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Medical Biophysics

Anthropomorphic phantom

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In-Vivo Ct Dosimetry During Virtual Colonoscopy, Jonathon W. Mueller Aug 2011

In-Vivo Ct Dosimetry During Virtual Colonoscopy, Jonathon W. Mueller

UT GSBS Dissertations and Theses (Open Access)

Virtual colonoscopy (VC) is a minimally invasive means for identifying colorectal polyps and colorectal lesions by insufflating a patient’s bowel, applying contrast agent via rectal catheter, and performing multi-detector computed tomography (MDCT) scans. The technique is recommended for colonic health screening by the American Cancer Society but not funded by the Centers for Medicare and Medicaid Services (CMS) partially because of potential risks from radiation exposure. To date, no in‐vivo organ dose measurements have been performed for MDCT scans; thus, the accuracy of any current dose estimates is currently unknown.

In this study, two TLDs were affixed to ...