Technical note: A new TLD-phantom measurement system for determining dose distribution levels in the right and left breast from spiral CT chest imaging.
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.
Hall
Jeffery L
JL
Department of Radiology, Martin Luther King/Drew Medical Center, 12021 South Wilmington Boulevard, Los Angeles, California 90059, USA. jehall@dhs.co.la.ca.us
Navarrete
Jorge L
JL
Surprenant
Edgar
E
Sklansky
Jack
J
Eisenman
Jack I
JI
D001940:Breast / Q000528:radiation effects*; D005260:Female; D006801:Humans; D016011:Normal Distribution; D019047:Phantoms, Imaging; D011879:Radiotherapy Dosage; D013819:Thermoluminescent Dosimetry / Q000379:methods; D036542:Tomography, Spiral Computed / Q000295:instrumentation* / Q000379:methods*