Scholarly Activity
Division of Medical Physics


2023

Focused Tomography”; Olson T, Leon S; Patent; Number 11,801,017; Granted Oct 31, 2023.

Monte Carlo-based Dosimetry of Fluoroscopy and Cone-Beam CT Imaging Studies for Yttrium-90 Radioembolization Patients” Moretti T, Leon S, Roa D, Olguin E, Paucar O, Gonzalez A; Lecture; Radiological Society of North America; Chicago, IL; Nov 26 – Nov 30, 2023.

Reproducibility of Hounsfield Unit Measurements Across Varying CT Acquisition and Reconstruction Parameters in Postmortem Subject”; Heshmat A, Leon S, Wymer D, Wymer D; Poster; American Association of Physicists in Medicine Annual Meeting; Houston, TX; July 23 July 27, 2023.

A Phantom-Based Monte Carlo Comparison of Lung Shunt Fraction Imaging Techniques”; Moretti T, Leon S, Mojabi Z, Schaeffer C, Arreola A; Poster; American Association of Physicists in Medicine Annual Meeting; Houston, TX; July 23 July 27, 2023.

Comparison of AGD from ‘Combo Mode’ vs ‘Synthetic Mode’” Mammography as a Function of Image-Specific Parameters; Heshmat A, Akerele M, Leon S;Poster; American Association of Physicists in Medicine Annual Meeting; Houston, TX; July 23 July 27, 2023.

Feasibility of Helical CTDIvol Measurement for Accurate Dose Estimation”; Akerele M, Barreto I, Leon S; Lecture; American Association of Physicists in Medicine Spring Clinical Meeting; Orlando, FL; Apr 1, 2023 – Apr 4, 2023.

Comparison of a Mobile Gamma Camera to a SPECT/CT System for Calculation of Lung Shunt Fraction: A Phantom Study”; Moretti T, Leon S, Schaeffer C, Mojabi Z, Arreola, M; Lecture; American Association of Physicists in Medicine Spring Clinical Meeting; Orlando, FL; Apr 1, 2023 – Apr 4, 2023.

Use of Effective Atomic Number and Electron Density Measurements in Dual-Energy Computed Tomography for Differentiating Iodine and Blood in Stroke Patients”; Schaeffer C, Leon S, Arreola M; Lecture; American Association of Physicists in Medicine Spring Clinical Meeting; Orlando, FL; Apr 1, 2023 – Apr 4, 2023.

Evaluation of a Simple Method to Obtain Quantitative Spatial Resolution Measurements from Extrinsic Gamma Camera Bar Pattern Images”; Leon S; American Association of Physicists in Medicine Spring Clinical Meeting; Orlando, FL; 4/1-4/4/23.

MRI-based nomograms and radiomics in presurgical prediction of extraprostatic extension in prostate cancer: a systematic review“; Calimano-Ramirez LF, Virarkar MK, Hernandez M, Ozdemir S, Kumar S, Gopireddy DR, Lall C, Balaji KC, Mete M, Gumus KZ; Abdom Radiol (NY) 2023; 48(7):2379-2400.

Deep Learning Algorithms for Multi-Region Bladder Cancer Segmentation“; Nicolas Julien, Gumus K et al.; Poster Presentation; American Urological Association; Chicago; 2023

Proposed priorities for low-dose radiation research and their relevance to the practice of radiology“; Mahesh M, Frush D, Gros S, Dauer L, Barreto I, Ansari A; Radiology 2023; 309:2.

Medical Physics Leadership Academy Journal Club (Leadership Club) Program – Two-Year Review in Building a Community of Leaders“; Cetnar A, Hall K, Hirata E, Wang D, Collins C, Barreto I, Edward S, Kapadia A, Wells M, Wilson J, Xu Y, Johnson J; J Appl Clin Med Phys 2023; 24:e14164.

Global Representatives’ Initiative of the American Association of Physicists in Medicine“; Lief E, Weygand J, Parker SA, Della Biancia C, Barreto I, Njeh C, Ngwa W; Med Phys International 2023;11(1)

Dual imaging agent for magnetic particle imaging and computed tomography“; Liu S, Heshmat A, Andrew J, Barreto I, Rinaldi-Ramos CM; Nanoscale Advances 2023;  Accepted, In Print.

Contrast Thresholds for Detection of Various Iodine Concentrations in Subtraction CT and Dual Energy CT Systems“; Heshmat A. Barreto I, Rill L, Liu S, Patel R, Arreola M; J Appl Clin Med Phys 2023;24(1):e13834

Women in Medical Physics. A Panel Session“; Barreto I; Oral Presentation; Annual Meeting of the Society of Directors of Academic Medical Physics Programs (SDAMPP); Houston, TX; July 2023.

How a Medical Physicist Can Use the ACR CT DIR To Solve Problems“; Barreto I;Oral Presentation. Annual Meeting of the AAPM; Houston, TX; July 2023.

Helical Estimation of the CTDIvol“; Barreto I; Oral Presentation; Annual Meeting of the AAPM; Houston, TX; July 2023.

Women in Medical Physics. A Panel Session“; Barreto I;Oral Presentation. Florida Chapter of the AAPM. Orlando, FL. April 2023

Assessment of a New CT Detector and Filtration Technology: Beam Characterization, Dosimetry, and Image Quality in Phantoms, Cadavers, and Patients“; Barreto, I, Correa N, Stoddard GJ, Heshmat A, Pressram A, Tuna I, Massini T, Moser P, Rill LN, Arreola MM; Oral Presentation; Annual Meeting of the AAPM; Houston, TX; July 2023

The Hidden Hemorrhage: Visualizing Brain Bleeds“; Pressram A, Barreto IL; Oral Presentation; Med Phys Slam Competition at the Annual Meeting of the AAPM; Houston, TX. July 2023;1st Place Winner.

Agreement between Dual-Energy Computed Tomography (DECT) and MRI after Stroke Intervention“; Pressram A, Barreto IL, DeJesus R, Khanna A, Carrasco-Rojas NE, Arreola MM; Oral Presentation; Annual Meeting of the AAPM; Houston, TX; July 2023.

An Overview of the Results of a Medical Physics Needs Assessment Survey in Low-to-Middle-Income Countries from the Perspective of Radiology and Radiotherapy Institutional Leaders“; Parker SA, Jackson AM, Ngwa WF, Barreto IL, Bernat BG, Sandwall PA, Weygand J, Mawlawi OR, Yorke AA, Khan R, Njeh CF, Hao Y, Lief EP, Huq MS, Al-Basheer AK, Biancia CD, Swanson WJ; Oral Presentation; Annual Meeting of the AAPM; Houston, TX; July 2023.

Towards Operational Performance: Measurements of MTF and NPS“; Stoddard GJ, Barreto IL. Poster Presentation; Annual Meeting of the AAPM; Houston, TX; July 2023.

Agreement between Dual-Energy Computed Tomography (DECT) and MRI after Stroke Intervention“; Pressram A, Carrasco-Rojas NE, DeJesus R, Khanna A, Barreto IL; Oral Presentation; Florida Chapter of the AAPM; Orlando, FL; April 2023. 1st Place Winner.

A Primer on the Value of MTF and NPS Measurements for Optimizing Clinical Protocols“; Stoddard GJ, Pressram A, Barreto IL; Poster Presentation; Florida Chapter of the AAPM; Orlando, FL; April 2023.

Agreement between Dual-Energy Computed Tomography (DECT) and MRI after Stroke Intervention“; Pressram A, Carrasco-Rojas NE, DeJesus R, Khanna A, Barreto IL; Oral Presentation’ Young Investigator Symposium of the Spring Clinical Meeting of the AAPM; Orlando, FL; March 2023; 1st Place Winner.

A Primer on the Value of MTF and NPS Measurements for Optimizing Clinical Protocols“; Stoddard GJ, Pressram A, Barreto IL; Poster Presentation at the Best Poster Competition; Spring Clinical Meeting of the AAPM; Orlando, FL; March 2023.

2022

Characterization of time of flight and resolution modeling on image quality in positron emission tomography”; Moretti T, Leon S, Schaeffer C, Arreola M; 2022; Journal of Applied Clinical Medical Physics; 23(10):e13751; 8 pp.

Low-dose radiotherapy to the lungs using an interventional radiology C-arm fluoroscope: Monte Carlo treatment planning and dose measurements in a postmortem subject”; Leon S, Paucar O, Correa N, Glassell M, Gonzales A, Olguin E, Shankar A, Moskvin V, Schwarz B, Alva-Sanchez M, Moyses H, Hamrick B, Sarria G, Li B, Tajima T, Necas A, Guzman C, Challco R, Montoya M, Meza Z, Zapata M, Gonzales A, Marquina J, Quispe K, Chavez T, Castilla, L., Moscoso Carrasco, J., Ramirez, J., Marquez, F., Neira, R., Vilca, W., Mendez, J., Hernandez J, Roa D;  2022; Biomedical Physics and Engineering Express; 8:065004; 13 pp.

Exploring generalizability of estimating CTDIvol using helical measurements”; Gress D, Barreto I, Schwarz B, Leon S, Kobistek R, Tomlinson J, Dillon C, Hernandez D, Mahesh M; Lecture;  Radiological Society of North America; Chicago, IL; Nov 27, 2022 – Dec 1, 2022.

Automated AI Pipeline for Brain Lesion Classification using Dual-Energy Computed Tomography”;  Schaeffer C, Leon S, Arreola M; Poster; Radiological Society of North America; Chicago, IL; Nov 27, 2022 – Dec 1, 2022.

Characterization of Time-of-Flight and Resolution Recovery on Image Quality in PET”; Moretti T, Leon S, Schaeffer C, Arreola M;  Poster; Society of Nuclear Medicine and Molecular Imaging; Feb 25, 2022 – Feb 27, 2022.

A Health System’s Response to the Ongoing Global Shortage of Iodinated Contrast Media”; Barreto I, Grajo JR, Brock DE, Magnelli L, Patel P, Hochhegger B; Am J Roentgenol 2022; 219(6):974-79.

PIMA-CT: Physical Model-Aware Cyclic Simulation and Denoising for Ultra-low-dose CT Restoration”; Liu, P, Xu, L, Fullerton G, Xiao Y, Nguyen JB, Li Z, Barreto I, Olguin C, Fang R; Frontiers in Radiology 2022; 2(904601):1-7

Advances in CT Imaging”; Barreto I; Oral Presentation {Presentation in Spanish};  4th Symposium of Clinical Medical Physics; Mexico City, Mexico; November 2022.

Women in Medical Physics. A Panel Session”; Barreto I; Oral Presentation {Presentation in Spanish};  4th Symposium of Clinical Medical Physics; Mexico City, Mexico; November 2022.

Advances in CT Imaging”; Barreto I, Oral Presentation. {Presentation in Portuguese} Invited Seminar at the College of Medicine of the University of Sao Paulo, October 2022.

Results of the International Council’s Medical Physics Needs Assessment Survey in Latin America”; Barreto, I; Oral Presentation {Presentation in Portuguese}; AAPM International Council’s Latin American Symposium: Medical Physics Education, Training and Professional Development in Latin America; Washington DC; July 2022.

Continuing Education. Investigating Estimation of CTDIvol Using Helical Technique”; Barreto, I; Oral Presentation; Annual Meeting of the AAPM; ACR Updates Including the New Stereotactic Breast Biopsy QC Manual; Washington DC; July 2022.

Continuing Education. Conference Participation as a Way of Promoting Collaboration With LMIC. AAPM International Council Symposium: Addressing Global Needs in Medical Physics Support”; Barreto, I; Oral Presentation; Annual Meeting of the AAPM; Washington DC; July 2022.

Principles and Clinical Applications of Dual Energy CT”; Barreto, I; Oral Presentation {Presentation in Portuguese}; 26th Brazilian Congress and 9th Latin American Congress of Medical Physics; Fortaleza, Brazil; June 2022.

“Methods for Reducing Metal Artifacts in CT Imaging”. Barreto, I; Oral Presentation {Presentation in Portuguese}; 26th Brazilian Congress and 9th Latin American Congress of Medical Physics; Fortaleza, Brazil; June 2022.

Local Diagnostic Reference Levels in Digital Radiography Examinations Based on Patient Thickness and Age”; M Akerele, B Schwarz, L Rill; Oral presentation; AAPM Annual Meeting; Washington, DC; July 2022.

Direct Dose Measurements Comparing Single-Energy and Dual-Energy Head CT Scans”; N Correa, M Glassell, C Schaeffer, I Barreto, M Arreola; Poster presentation; AAPM Annual Meeting; Washington, DC; July 2022.

The Effect of Beam Overlapping in Dual-Energy Volume CT Scans and Single-Energy Helical Scans”; N Correa, I Barreto, M Arreola; Poster presentation; AAPM Annual Meeting; Washington, DC; July 2022

Determining the Contribution of CT to Total Skin Dose for Procedures in a Hybrid CT/Angiography Suite”; M Glassell, B Schwarz, L Rill, M Arreola; Oral presentation. AAPM Annual Meeting; Washington, DC; July 2022.

Contrast Thresholds for Detection of Various Iodine Concentrations in Subtraction CT and Dual Energy CT Systems”; A Heshmat, I Barreto, L Rill, M Arreola; Poster presentation; AAPM Annual Meeting; Washington, DC; July 2022

Use of Automation in Image Quality Analysis in PET”; T Moretti, S Leon, C Schaeffer, M Arreola; Oral presentation; AAPM Annual Meeting; Washington, DC; July 2022.

Gd-Doped Gel Phantom Recipe Calculator for 3T MRI”; Z Razi, A Bumin, H Gao, Z Zhang, M Arreola; Poster presentation; AAPM Annual Meeting; Washington, DC; July 2022.

A novel methodology for assessing material differentiation in dual-energy computed tomography”; C Schaeffer, S Leon, M Arreola; Oral presentation; AAPM Annual Meeting; Washington, DC; July 2022.

Pediatric craniosynostosis computed tomography: an institutional experience in reducing radiation dose while maintaining diagnostic image quality“; I L Barreto, I S Tuna, D A Rajderkar, J A Ching, L S Governale; Pediatric Radiology; January 2022.

Monte Carlo simulations and phantom validation of low-dose radiotherapy to the lungs using an interventional radiology C-arm“; D Roa, S Leon, O Paucar, A Gonzales, B Schwarz, E Olguin, V Moskvin, M Alva-Sanchez, M Glassell, N Correa, H Moyses, A Shankar, B Hamrick, G R Sarria, B Li, T Tajima, A Necas, C Guzman, R Challco, M Montoya, Z Meza, M Zapata, A Gonzales, F Marquez, R Neira, W Vilca, J Mendez, J Hernandez; Physica Medica; February 2022; Volume 94, Pages 24-34

2021

Comparison of CT image quality between the AIDR 3D and FIRST iterative reconstruction algorithms: an assessment based on phantom measurements and clinical images”; Leon S, Olguin E, Schaeffer C, Olguin C, Verma N, Mohammed T, Grajo J, Arreola M. Phys Med Biol; 66(12); 2021; 125002.

Accuracy and reproducibility of effective atomic number and electron density measurements from sequential dual energy CT”; Schaeffer C, Leon S, Olguin C, Arreola M; Med Phys. 48(7); 2021; 3525-3539.

Dose Simulations of an Early 20th Century Kilovoltage Pneumonia Radiotherapy Technique Performed with a Modern Fluoroscope”; Roa D, Moyses H, Leon S, Hamrick B, Sarria G, Li B, Tajima T, Necas A, Guzman C, Paucer O, Gonzales A, Challco R, Montoya M, Arqque Z, Gonzales A, Hernandez J, Drake J, Villane R, Lea J; Medical Dosimetry; 46; 2021; 74-79.

Letter to the Editor: Rationale for using a C-arm fluoroscope to deliver a kilovoltage radiotherapy treatment to COVID-19 patients”; Roa D, Moyses H, Leon S, Hamrick B, Sarria G, Li B, Tajima T, Necas A, Guzman C, Paucer O, Gonzales A, Challco R, Montoya M, Arqque Z, Gonzales A, Hernandez J; Medical Dosimetry; 46, 2021. 1-2.

Comparison of CT Image Quality Between AIDR 3D and FIRST Iterative Reconstruction Algorithms: An Assessment Based On Clinical Images”; Olguin C, Leon S, Verma N, Mohammed T, Grajo J, Arreola M; American Association of Physicists in Medicine Spring Clinical Meeting; Virtual Meeting; Apr 17, 2021 – Apr 20, 2021.

Delivery of low-dose radiotherapy to the lungs using fluoroscopy equipment: simulation and phantom validation”; Leon S; Sociedad Mexicana de Irradiacion y Dosimetria, International Symposium on Solid State Dosimetry; Virtual; Sept 27, 2021 – Oct 1, 2021.

Implementing TG-126 PET/CT Acceptance and QA”; Leon S; American Association of Physicists in Medicine Spring Clinical Meeting; Virtual; 4/17-4/20/21.

Protocol for the measurement of the absorbed dose rate to water for a planar 32P emitting brachytherapy source: A multi-institutional validation“. L Mulet, I Barreto, G N Cohen, A Damato, T Mauceri, J Pursley, C Deufel; Brachytherapy. October 2021.

“‘Focused’ CT: A Reconstruction Algorithm Permitting Radiation Dose Reduction for Region-of-Interest Viewing”; Leon S; AAPM Annual Meeting; Virtual; 2021.

Career Preparation for Graduate Students: Preliminary Evaluation of an Introductory Course of the Profession of Medical Physics“; Leon S; AAPM Annual Meeting; Virtual; 2021.

Your Technical Skills Won’t Get You There: Identifying Vital Skills to Thrive in Your Career“; Barreto, I; AAPM Annual Meeting – Medical Physics Leadership Academy Professional Symposium; Virtual; 2021.

It only took a pandemic: Engaging online students with active learning strategies“; Barreto, I; AAPM Annual Meeting – AAPM Education Council Symposia; Virtual. 2021

You Spin Me Right Round: Approaches to Measuring CT Dose in Helical Modes“; Barreto, I; AAPM Annual Meeting – SAM Imaging Educational Course; Virtual; 2021.

Low-dose CT in pediatric craniosynostosis: an institutional experience in reducing radiation while maintaining diagnostic image quality”; Barreto I, Tuna I, Rajderkar D, Ching J, Governale L. Pediatric Radiology. Accepted August 2021, in press.

A report on the inter-observer and inter-instrument variability of end-user calibrations of the RIC-100 32P beta emitting brachytherapy source”; Mulet L, Barreto I, Cohen G, Damato A, Pursley J, Deufel C. Brachytherapy. Accepted August 2021, in press.

Optimización de protocolos de tomografía computarizada”; Barreto, I; Pre-Symposium Course of Clinical Medical Physics and Imaging. Universidad Autonoma Metropolitana, Mexico City, Mexico. February 2021.

Metal artifacts in CT imaging: physics and methods to reduce them”; Barreto, I; International Symposium of Clinical Medical Physics at the Universidad Autonoma Metropolitana. Mexico City, Mexico. February 2021.

CT Protocol Optimization: Why it matters, what is required, and how to do it”; Barreto, I; Florida Chapter of the American Association of Physicists in Medicine (FL-AAPM). Virtual. February 2021

2020

Dual Energy CT Protocol Optimization for Increased Blood Detectability of Virtual Non-Contrast Images in a Single Source Dual Energy CT System: A Phantom Study”; Olguin C, Leon S, Barreto I, De Jesus R, Arreola M; Poster; American Association of Physicists in Medicine and Canadian Organization of Medical Physicists; Virtual Meeting; Jul 12, 2020 – Jul 16, 2020.

The Effect of Reconstruction Filters on Dual Energy CT Images From a Single-Source Sequential System”; Olguin C, Barreto I, Leon S, Schaeffer C, Heshmat A, Arreola M; Poster; American Association of Physicists in Medicine and Canadian Organization of Medical Physicists; Virtual Meeting; Jul 12, 2020 – Jul 16, 2020.

Evaluation of the Modulation Transfer Function From a Model-Based and a Statistical-Based Hybrid Iterative Reconstruction Algorithm Using Single-Energy and Dual-Energy CT”; Olguin E, Leon S, Olguin C, Arreola M; Lecture; American Association of Physicists in Medicine and Canadian Organization of Medical Physicists; Virtual Meeting; Jul 12, 2020 – Jul 16, 2020.

Raw-Data Effective Atomic Number and Electron Density Assessment Accuracy: A Phantom Study”; Schaeffer C, Leon S, Olguin C, Arreola M; Poster; American Association of Physicists in Medicine and Canadian Organization of Medical Physicists; Virtual Meeting; Jul 12, 2020 – Jul 16, 2020.

A Comparison of Noise Properties Between Statistical-Based Hybrid and Model-Base Iterative Reconstruction Algorithms in CT”; Schaeffer C, Leon S, Olguin E, Arreola M; Poster; American Association of Physicists in Medicine and Canadian Organization of Medical Physicists; Virtual Meeting; Jul 12, 2020 – Jul 16, 2020.

Reconstruction Kernel Effects on Iodine Maps from a Single-Source Dual Energy CT (DECT) System”; Olguin C, Barreto I, Leon S, Arreola M; Presentation; Florida Chapter, American Association of Physicists in Medicine; Orlando, FL; 2/27-2/29/20.

Raw-Data Effective Atomic Number (Zeff) and Electron Density (ED) Assessment Accuracy: A Phantom Study” Schaeffer C, Leon S, and Olguin C; Presentation; Florida Chapter, American Association of Physicists in Medicine; Orlando, FL; 2/27-2/29/20.

Implementation of the New ACR QC Program for Mammography and DBT”; Leon S; American Association of Physicists in Medicine Florida Chapter Meeting; Orlando, FL; 02/27-02/29/20.

The helically-acquired CTDIvol as an alternative to traditional methodology“; Leon S, Kobistek R, Olguin E, Zhang Z, Barreto I, Schwarz B; J Appl Clin Med Phys 2020; 21(8): 263-271.

Patient size matters: Effect of tube current modulation on size-specific dose estimates (SSDE) and image quality in low-dose lung cancer screening CT“; Barreto I, Verma N, Olguin C, Quails N, Correa N, Mohammed TL; J Appl Clin Med Phys 2020; 21(4): 87–94

Iodinated contrast extravasation on post-revascularization computed tomography mimics magnetic resonance hyperintense acute reperfusion marker: a case study“; De Prey J, Yu C, Echevarria FD, Barreto I, Rees JH, DeJesus RO, Simpkins AN; Journal of Stroke and Cerebrovascular Diseases; 2020.

Dose Simulations of an Early 20th Century Kilovoltage Pneumonia Radiotherapy Technique Performed with a Modern Fluoroscope“; Roa D, Moyses H, Leon S, Hamrick B, Sarria G, Li B, Tajima T, Necas A, Guzman C, Paucer O, Gonzales A, Challco R, Montoya M, Arqque Z, Gonzales A, Hernandez J, Drake J, Villane R, and Lea J; Medical Dosimetry; 2020. 

Letter to the Editor: Rationale for using a C-arm fluoroscope to deliver a kilovoltage radiotherapy treatment to COVID-19 patients“; Roa D, Moyses H, Leon S, Hamrick B, Sarria G, Li B, Tajima T, Necas A, Guzman C, Paucer O, Gonzales A, Challco R, Montoya M, Arqque Z, Gonzales A, and Hernandez J; Medical Dosimetry; Aug 30, 2020.

Specific absorbed fractions for a revised series of the UF/NCI pediatric reference phantoms: Internal electron sources.Schwarz, Bryan; Godwin, William; Wayson, Michael; Dewji, Shaheen; Jokisch, D; Lee, Choonsik; Bolch, Wesley; Phys Med Bio; 2020.

Specific absorbed fractions for a revised series of the UF/NCI pediatric reference phantoms: Internal photon sources.“; Schwarz, Bryan; Godwin, William; Wayson, Michael; Dewji, Shaheen; Jokisch, D; Lee, Choonsik; Bolch, Wesley; Phys Med Bio; 2020.

Comparison of Metal Artifact Reduction using Single-Energy CT and Dual-Energy CT with various metallic implants in cadavers“; Barreto, Izabella; Pepin, Eric; Davis, Ivan; Dean, Cooper; Massini. Tara; Rees, John; Olguin, Catherine; Quails, Nathan; Correa, Nathalie; Rill, Lynn; Arreola, Manuel; EJR; 2020.

A Phantom-Based Assessment of Low-Contrast Performance Comparing Iterative Reconstruction Algorithms in CT”; Leon, S; AAPM Annual Meeting. July 2020.


2019

Material Differentiation in Virtual Non-Contrast Images and Iodine Maps of a Dual Energy CT (DECT) System”; Olguin C, Schaeffer C, Correa N, Heshmat A, Quails N, Rill L, Arreola M, Barreto I, Leon S; Poster; American Association of Physicists in Medicine Spring Clinical Meeting; Kissimmee, FL; 3/30-4/2/19.

Stroke Protocol Optimization with Dual Energy CT: Virtual Monochromatic Energy Image Selection with Enhancement of Residual Iodine Contrast and Hemorrhagic Transformations”; Olguin C, Leon S, Barreto I, and Schaeffer C; Poster; Radiological Society of North America; Chicago, IL; 11/29-12/4/19.

AAPM Online Learning Services”; Leon S; American Association of Physicists in Medicine Florida Chapter Meeting; Daytona Beach Shores, FL; 02/28-03/02/19.

Education and Mentoring of New Medical Physicists”; Leon S; American Association of Physicists in Medicine Annual Meeting; San Antonio, TX; 7/14-7/18/19.

“Impact of patient centering in CT on organ dose and the effect of using a positioning compensation system: Evidence from OSLD Measurements in postmortem subjects”; Barreto I, Lamoureux R, Olguin C, Quails N, Rill L, Arreola M; J Appl Clin Med Phys. 2019 Jun;20(6):141-151. doi: 10.1002/acm2.12594. Epub 2019 May 2.

Is measurement of CTDIvol with a helical scan an acceptable alternative to the standard single-slice methodology?”; Leon S, Kobistek R, Barreto I, Schwarz B, Zhang Z, Olguin E; AAPM Spring Clinical Meeting. Orlando, FL. April 2019.

Accuracy of the helically acquired CTDIvol as an alternative to traditional methodology?”; Leon S, Kobistek R, Zhang Z, Olguin E, Barreto I, Schwarz B; AAPM Annual Meeting. San Antonio, TX. July 2019.

Material Differentiation in Virtual Non-Contrast Images and Iodine Maps of a Dual Energy CT (DECT) System“. Olguin C(g), Schaeffer C(g), Correa N, Heshmat A, Quails N, Arreola M, Barreto I, Leon S. 2019. J Appl Clin Med Phys.  46/6: e94-e670.

Characterizing the Impact of Beam Hardening Conditions on Iodine Maps and Virtual non-Contrast Images on a Dual Energy CT Scanner“. Olguin, C(g), Leon, S, Barreto, I.  2019. J Appl Clin Med Phys. 25/6.


2018

“Image Quality and Patient-Specific Organ Doses in Stone Protocol CT: A Comparison of Traditional CT to Low Dose CT with Iterative Reconstruction”; Pai R, Modh R, Lamoureux RH, Deitte L, Wymer DC, Mench A, Lipnharski I, Henriksen C, Arreola M, Canales BK; Biomed Res Int. 2018 Sep 27;2018:5120974. doi: 10.1155/2018/5120974. eCollection 2018.

“Comparison of skin dose measurement using nanoDot® dosimeter and machine readings of radiation dose during cardiac catheterization in children”; Balaguru D, Rodriguez M, Leon S, Wagner LK, Beasley CW, Sultzer A, Numan MT; Ann Pediatr Cardiol. 2018 Jan-Apr;11(1):12-16. doi: 10.4103/apc.APC_86_17.

“Low-dose Lung Cancer Screening at an Academic Medical Center: Initial Experience and Dose Reduction Strategies”; Ahmed A, Verma N, Barreto I, Mohammed TL; Acad Radiol. 2018 Aug;25(8):1025-1030. doi: 10.1016/j.acra.2017.12.023. Epub 2018 Feb 1.

“Low-dose Lung Cancer Screening at an Academic Medical Center”; Ahmed A, Verma N, Barreto I, Mohammed T; Academic Radiology, DOI: 10.1016/j.acra.2017.12.023.

Characterization of Optically Stimulated Luminescent Dosimeters in a Simulated Fluoroscopy Beam“. Quails, N, Correa, N, Barreto, I, Carranza, C, Rill, L, Arreola, M. 2018. J Appl Clin Med Phys. 45/6: e120-e706.

Size-Specific Dose Estimates (SSDE) for Patients Examined with Low-Dose Lung Cancer Screening Using Different CT Manufacturers“. Lipnharski, I, Quails, N, Carranza, C, Correa, N, Rill, L, Arreola, M. 2018. J Appl Clin Med Phys. 45/6: 3600.

The Effect of Tube Current Modulation on Patient Dose and Image Quality in Patients Examined with Low-Dose Lung Cancer Screening CT“. Barreto, I, Verma, N, Carranza, C, Quails, N, Correa, N, Mohammed, T.  2018. J Appl Clin Med Phys. 45/6: e691.

Current state of practice regarding digital radiography exposure indicators and deviation indices: Report of AAPM Imaging Physics Committee Task Group 232“. Dave JK, Jones AK, Fisher R, Hulme K, Rill L, Zamora D, Woodward A, Brady S, MacDougall RD, Goldman L, Lang S, Peck D, Apgar B, Shepard SJ, Uzenoff R, Willis C.Med Phys 2018: 45(11); e1146-60.


2017

“The Patient Size Setting: A Novel Dose Reduction Strategy in Cerebral Endovascular Neurosurgery Using Biplane Fluoroscopy”; Corliss BM, Bennett J, Brennan MM, Rosemaram A, Hartman C, Stetler WR, Polifka AJ, Hoh BL, Arreola MM, Fox WC; World Neurosurg. 2018 Feb;110:e636-e641. doi: 10.1016/j.wneu.2017.11.056. Epub 2017 Nov 24.

“Assessment of volumetric absorbed dose for mobile fluoroscopic 3D image acquisition”; Leon S; J Appl Clin Med Phys. 2017 Jul;18(4):230-236. doi: 10.1002/acm2.12108. Epub 2017 Jun 6.

“Optimizing Dose Reduction in Pediatric Head CT Protocols While Maintaining Image Quality in Postmortem Head Scans”; Barreto I, Quails N, Carranza C, Correa N, Rajderkar D, Rill L, Arreola M; Conference: American Association of Physicists in Medicine – Spring Clinical Meeting, New Orleans, Louisiana, 2017

“Should We Utilize Tube Current Modulation in Head CT Exams? An Assessment of Image Quality and Direct Dosimetry with OSLDs”; Barreto I, Carranza C, Quails N, Correa N, Rajderkar D, Rill L, Arreola M; Poster, April 2017.

What Is the Relative Radiation Dose Increase for an Obese Patient Undergoing Radiography, Fluoroscopy, and CT Examinations?“; Huo D, Rill L. Hallway Conversations in Physics: American Journal of Roentgenology 2017: 208: W56-7.


2016

Breast Tomosynthesis with Synthetic 2D Mammograms”; Leon S; American Association of Physicists in Medicine Southwest Chapter Meeting; New Orleans, LA; 03/31-04/02/16.

CT ArtifactsLeon S; Texas Radiological Society Annual Scientific Meeting; San Antonio, TX; 04/22-04/24/16. 

Breast Tomosynthesis with Synthetic 2D Mammograms”; Leon S; American Association of Physicists in Medicine Florida Chapter Meeting; Daytona Beach Shores, FL; 09/08-09/09/16.

“Radiation Safety and ALARA In The Emergency Department: Analysis Of Emergency Medicine Residents’ Awareness And Patient Dialogue”; Thornton L, Mohammed T, Barreto I, Verma N; Florida Radiological Society, Tampa, FL January 2016.

“Clinical Optimization of CT Protocols Using Post-Mortem Subjects”; Barreto I; Florida Chapter of the American Association of Physicists in Medicine (AAPM), Orlando FL.

“In-Utero Dose Measurements Within Postmortem Subjects for Estimating Fetal Doses in Pregnant Patients Examined with Pulmonary Embolism, Trauma, and Appendicitis CT”; Barreto I, Quails N, Carranza C, Correa N, Bidari S, Bickelhaup M, Rill L, Arreola M; Medical Physics 43(6):3394-3395 June 2016. DOI: 10.1118/1.4955864.

“Direct Measurement of Organ Doses Resulting From Head and Cervical Spine Trauma CT Protocols”; Carranza C, Barreto I, Quails N, Correa N, Rill L, Arreola M; Medical Physics 43(6):3350-3351 June 2016 DOI: 10.1118/1.4955678.

“Optimizing Dose Reduction in Adult Head CT Protocols While Maintaining Image Quality in Postmortem Head Scans”; Barreto I, Carranza C, Quails N, Correa N, Rajderkar D, Bennett J, Rill L, Arreola M; Medical Physics 43(6):3397-3397 June 2016 DOI: 10.1118/1.4955874.

“Development of Proton Tissue Equivalent Materials for Calibration and Dosimetry Studies”; Olguin E, Flampouri S, Barreto I, Bolch W; Medical Physics 43(6):3336-3336 June 2016 DOI: 10.1118/1.4955623.

“Direct Measurement of Organ Doses Resulting From Head and Cervical Spine Trauma CT Protocols”; Carranza C, Barreto I, Quails N,Correa N, Rill L, Arreola M, Bidari S; Conference: American Association of Physicists in Medicine, Washington DC, July 2016.

“Implementation and optimization of a new low dose lung cancer screening CT program”; Barreto I; Conference: Florida Chapter of the American Association of Physicists in Medicine, Daytona Beach, FL, September 2016.

“Clinical optimization of CT protocols using cadavers”; Barreto I; Conference: International Symposium on Solid State Dosimetry, Chiapas, Mexico, September 2016.


2015

“Changing Default Fluoroscopy Equipment Settings Decreases Entrance Skin Dose in Patients”; Canales BK, Sinclair L, Kang D, Mench AM, Arreola M, Bird VG; J Urol. 2016 Apr;195(4 Pt 1):992-7. doi: 10.1016/j.juro.2015.10.088. Epub 2015 Oct 23.

“Determining Organ Doses from CT with Direct Measurements in Postmortem Subjects: Part 2 – Correlations with Patient-specific Parameters”. Sinclair L, Griglock TM, Mench A, Lamoureux R, Cormack B, Bidari S, Rill L, Arreola M; Radiology. 2015 Nov;277(2):471-6. doi: 10.1148/radiol.2015140971. Epub 2015 Jun 23.

“Determining Organ Doses from CT with Direct Measurements in Postmortem Subjects: Part 1 – Methodology and Validation”; Griglock TM, Sinclair L, Mench A, Cormack B, Bidari S, Rill L, Arreola M; Radiology. 2015 Nov;277(2):463-70. doi: 10.1148/radiol.2015140968. Epub 2015 Jun 4.

“Quantifying Organ Dose and Improving Image Quality in CT Exams of Subjects with Metal Implants Utilizing a Metal-Artifact Reduction Algorithm”; Lipinharski I, Carranza C, Mench A, Lamoureux R, Cormack B, Bidari S, Rill L, Arreola M; Conference: Spring Clinical Meeting of the AAPM, At St Louis, MO.

“Correlating Image Quality and Reduced Radiation Exposure From Low-Dose CT Scanning in a Lung Cancer Screening Program”; Lipnharski I, Mench A, Carranza C, Lamoureux R, Gyapong S, Rill L, Mohammed T, Arreola M; Conference: Spring Clinical Meeting of the AAPM, At St Louis, MO

“A Comparison of Calculated Absorbed Radiation Organ Doses and Image Quality for Iterative Reconstruction Versus Filtered Back Projection CT in Kidney Stone Patients”; Modh R, Mason J, Deitte L, Mench A, Barreto I, Lee Derek, Arreola M, Yamamoto A, Vorhis E, Monroe C, Lamoureux R, Batson J, Henriksen C, Canales B; The Journal of Urology 193(4):e87 April 2015 DOI: 10.1016/j.juro.2015.02.315.

“Introduction and Investigation of Effective Diameter Ratios as a New Patient Size Metric for Use in CT”; Lamoureux, Sinclair L, Mench A, Barreto I, Carranza C, Cormack B, Bidari S, Rill L, Arreola M; Medical Physics 42(6):3247 June 2015 DOI: 10.1118/1.4924025.

“Use of Postmortem Subjects for Subjective Image Quality Assessment in Abdominal CT Protocols with Iterative Reconstruction”; Mench A, Barreto I, Carranza C, Sinclair L, Lamoureux R, Sajdor LO, Cormack B, Mohammed T, Rill L, Arreola M; Medical Physics 42(6):3542 June 2015 DOI: 10.1118/1.4925246.

“Direct Organ Dose Measurements in a Human Cadaver Scanned with Pediatric CT Protocols”; Barreto I, Lamoureux R, Carranza C, Cormack B, Bidari S, Rill L, Arreola M; Medical Physics 42(67):3745 June 2015 DOI: 10.1118/1.4926311.

“Investigation of Effects of Adipose Tissue Shielding On Organ Doses and Equation Modeling in Post-Mortem Subjects for CT”; Lamoureux R, Barreto I, Carranza C, Mench A, Sinclair L, Cormack B, Bidari S, Rill L, Arreola M; Medical Physics 42(6): 3747 June 201`5 DOI: 10.1118/1.4926318. 

“Direct Organ Dose Measurements and Image Quality Analysis in Low Dose Lung Cancer Screening CT Scans”; Barreto I, Lamoureux R, Carranza C, Mench A, Gyapong S, Rill L, Verma N, Mohammed T, Arreola M; RSNA November 2015.


2014

“Characterization of scatter in digital mammography from use of Monte Carlo simulations and comparison to physical measurements”; Leon SM, Brateman LF, Wagner LK; Med Phys. 2014 Nov;41(11):111914. doi: 10.1118/1.4894808.

“Characterization of scatter in digital mammography from physical measurements”; Leon SM, Brateman LF, Wagner LK; Med Phys. 2014 Jun;41(6):061901. doi: 10.1118/1.4873321.

“The Use of New Instrumentation in Digital Mammography Measurements”; Brateman L, Heintz P; CIRMS Medical Session, National Institute of Standards and Technology. Gaithersburg, MD. March 2014.

“Obtaining Intersocietal Accreditation Commision Accreditation for Dental Cone Beam CT”. Wayson M, Arreola M; AAPM Spring Clinical Meeting. Denver, CO. March 2014.

“Communicating Risk”; McCullough C, Wagner L, Kofler J, Brateman L; AAPM Annual Meeting. Austin, TX. July 2014.


2013

“The Impact of Mammography Physics Instrumentation on Entrance Air Kerma and Mean Glandular Dose”; Brateman L, Heintz P; AAPM Annual Meeting. Indianapolis, IN. August 2013.

“Comparisons and Limitations of Physics Instrumentation in Mammography”; Brateman L, Heintz P; AAPM Annual Meeting. Indianapolis, IN. August 2013.

“Use of CT-based intraoperative spinal navigation: management of radiation exposure to operator, staff, and patients”; Bandela JR, Jacob RP, Arreola M, Griglock TM, Bova F, Yang M; World Neurosurg. 2013 Feb;79(2):390-4. doi: 10.1016/j.wneu.2011.05.019. Epub 2011 Nov 7.


2011

“Resident education in the radiological sciences: what now?”; Wagner LK, Beasley CW, Oldham S, Leon S, Ferguson E; AJR Am J Roentgenol. 2011 Jan;196(1):152-6. doi: 10.2214/AJR.10.4929.


2010

“Workflow efficiency comparison of a new CR system with traditional CR and DR systems in an orthopedic setting”; Hartmann B; Rill LN; Arreola M; J Digit Imaging. 2010 Dec;23(6):666-73. doi: 10.1007/s10278-009-9213-9. Epub 2009 May 23.


2009

“Comparison of two commercial CAD systems for digital mammography”; Leon S, Brateman L, Honeyman-Buck J, Marshall J; J Digit Imaging. 2009 Aug;22(4):421-3. doi: 10.1007/s10278-008-9144-x. Epub 2008 Aug 13.


2007

The Transition to Digital Mammography in an Outpatient Setting”; Brateman L, Leon S; American Association of Physicists in Medicine Florida Chapter Meeting;  Orlando, FL; 05/10-05/12/07.

“Organ and effective doses in pediatric patients undergoing helical multislice computed tomography examination”; Lee C, Lee C, Staton RJ, Hintenlang DE, Arreola MM, Williams JL, Bolch WE; Med Phys. 2007 May;34(5):1858-73.

“Organ and effective doses in infants undergoing upper gastrointestinal (UGI) fluoroscopic examination”; Staton RJ, Williams JL, Arreola MM, Hintenlang DE, Bolch WE; Med Phys. 2007 Feb;34(2):703-10.

“Organ and effective doses in newborns and infants undergoing voiding cystourethrograms (VCUG): a comparison of stylized and tomographic phantoms”; Pazik FD, Staton RJ, Williams JL, Arreola MM, Hintenlang DE, Bolch WE; Med Phys. 2007 Jan;34(1):294-306.


2006

“A tomographic physical phantom of the newborn child with real-time dosimetry. II. Scaling factors for calculation of mean organ dose in pediatric radiography”; Staton RJ, Jones AK, Lee C, Hintenlang DE, Arreola MM, Williams JL, Bolch WE; Med Phys. 2006 Sep;33(9):3283-9.

“Organ and effective doses in newborn patients during helical multislice computed tomography examination”; Staton RJ, Lee C, Lee C, Williams MD, Hintenlang DE, Arreola MM, Williams JL, Bolch WE; Phys Med Biol. 2006 Oct 21;51(20):5151-66. Epub 2006 Sep 22.


2005

“Radiation exposure with use of the mini-C-arm for routine orthopaedic imaging procedures”; Badman BL, Rill L, Butkovich B, Arreola M, Griend RA; J Bone Joint Surg Am. 2005 Jan;87(1):13-7.


2004

“Management of pediatric radiation dose using Canon digital radiography”; Arreola M; Rill L; Pediatr Radiol. 2004 Oct;34 Suppl 3:S221-6; discussion S234-41.


2003

“Evaluating radiographic parameters for mobile chest computed radiography: phantoms, image quality and effective dose”; Rill LN; Brateman L; Arreola M; Med Phys. 2003 Oct;30(10):2727-35.

“Enterprise-wide CR implementation: the Shands Healthcare System experience”; Arreola M; Rill LN; J Digit Imaging. 2003 Jun;16(2):173-9. Epub 2003 Sep 11.

“A video analysis technique for organ dose assessment in pediatric fluoroscopy: applications to voiding cystourethrograms (VCUG)”; Bolch WE, Pomije BD, Sessions JB, Arreola MM, Williams JL, Pazik FD; Med Phys. 2003 Apr;30(4):667-80.


2002

“Comparisons of point and average organ dose within an anthropomorphic physical phantom and a computational model of the newborn patient”; Sessions JB, Roshau JN, Tressler MA, Hintenlang DE, Arreola MM, Williams JL, Bouchet LG, Bolch WE; Med Phys. 2002 Jun;29(6):1080-9.


1999

“View box luminance measurements and their effect on reader performance”; Rill LN, Huda W, Gkanatsios NA; Acad Radiol. 1999 Sep;6(9):521-9.


1997

“Comparison of a photostimulable phosphor system with film for dental radiology”; Huda W, Rill LN, Benn DK, Pettigrew JC; Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1997 Jun;83(6):725-31.