Clinical Modalities
Division of Medical Physics

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Computed Tomography (CT)

The Division of Clinical Radiological Physics has been conducting nationally-recognized research on patient dosimetry and clinical image quality in CT utilizing post-mortem subjects. Our outstanding PhD graduates have established this research under the direction of Dr Arreola and with the assistance of Dr Rill, along with the invaluable contributions by Dr Sharat Bidari, and Brian Cormack, CT technologist.

The foundation work, using optically-stimulated luminescent dosimeters (OSLDs) and anthropomorphic phantoms, was completed by Medical Physics graduates Drs Lindsey Berkowitz (now at Tufts Hospital) and Monica Ghita (now at Virginia Commonwealth University). This was immediately followed by the development of the post-mortem dosimetry method by Medical Physics graduate Dr Thomas Griglock (now at the Oregon Health Sciences University), and the development of a mathematical basis to calculate organ doses by Medical Physics graduate Dr Lindsay DeWeese (now at Oregon Health Sciences University).

The first-ever evaluation of dose and image quality of the Toshiba AIDR Iterative Reconstruction algorithm was completed by Medical Physics graduate Dr Anna Mench (now at Salem Hospital, Oregon).

Medical Physics graduates Drs Rebecca Lamoureaux and Izabella Barreto led additional research on the Impact of table height and positioning on patient doses in CT (funded by Canon).

Our graduates, and now faculty members, Drs Barreto and Leon continue conducting various research projects in CT, including a group of projects funded by Canon Medical Systems on Dual-Energy CT, including, among others:

  • Evaluation of metal artifact reduction algorithms with single- and dual energy CT (funded by Canon)
  • Experimental validation of the size-specific dose estimate (SSDE) formalism
  • Development of a task-based methodology for observer studies of image quality (with assistance from other divisions including Thoracic Imaging, Pediatric Radiology, Abdominal Imaging and Musculoskeletal Radiology)
  • Development of low-dose chest protocols for CT lung screening (with Dr Mohammed)
  • Investigation of dose and image quality of pediatric head CT studies (with Dr Rajderkar)
  • Evaluation of Canon’s new iterative reconstruction algorithm, FIRST
  • Evaluation of Canon’s new detector PUREVision

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Interventional Radiology (IR) and Fluoroscopy

Work in assessment of skin doses from interventional procedures is being led by Drs Rill and Schwarz. A particularly unique project on direct measurement of skin and lens of the eye dose resulting from interventional neurosurgical procedures has been led by Drs Rill and Arreola, in collaboration with Dr Chris Fox in Neurosurgery.

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Magnetic Resonance Imaging (MRI)

Novel work in the determination of protein concentrations using MR Imaging is being coordinated by Drs Arreola and Schwarz.