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Technical note: A new TLD-phantom measurement system for determining dose distribution levels in the right and left
Jeffery L Hall1, Jorge L Navarrete, Edgar Surprenant
1Department of Radiology, Martin Luther King/Drew Medical Center, 12021 South Wilmington Boulevard, Los Angeles, California 90059, USA. jehall@dhs.co.la.ca.us
Abstract:
Two specially designed plastic/aluminum phantoms positioned thermoluminescent dosimeters (TLDs) at the right and left breast location of an anthrophomorophic chest torso. Imaging was performed on a spiral CT for a Volume of the chest phantom through the breast area for a noncontiguous (pitch 1.5) helical chest scan. Conventional pencil beam ionization chamber measurements were made at the same operating parameters. The doses ranged from approximately 1 to 3 cGy. For both breast phantoms, the doses were highest for the medial inner quadrants near the mediastinum. The doses were lowest for the outer quadrants (lateral aspects) of both breasts.