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Medical Physics Seminar – Monday, February 18, 2013

Intensity Modulated CT?

Timothy Szczykutowicz, PhD (student of Dr. Charles Mistretta)
Research Assistant, Department of Medical Physics, UW-School of Medicine & Public Health, Madison, WI - USA –

"Realizing that all of x-ray imaging could benefit from a finer level of patient specific dose modulation, we developed a digitial beam attenuation (DBA) system that allows for modulation of x-ray dose within the fan angle. Our system allows for dose distributions to be tailored in a never before available level of control, which keeps the dose down while in many cases simultaneously improving image quality. Our technology can also be used to implement volume of interest (VOI) imaging, in which only a small volume of the patient is fully irradiated, the rest of the patient receives a much smaller dose. The implications of this work, if successfully translated to the clinic, would be lower doses, less noise induced streaking artifacts, and the possibility of new and improved imaging acquisition techniques like VOI and photon counting imaging.

This talk will cover the complete development of the first prototype and show the first experimental results taken with the system. Dose reductions of up to 3.6 times compared to conventional CT imaging will be presented. In addition, results highlighting the application of the DBA to volume of interest imaging will also be presented."

Location: 1335 (HSLC) Health Sciences Learning Center, 750 Highland Avenue, Madison, WI

Time: 4:00pm-5:00pm



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