MOSFET dosimetry for radiation dose assessment of bismuth shielding of the eye in children.
OBJECTIVE
The purpose of our study was to measure radiation dose to the orbit during pediatric cranial CT with and without bismuth shielding using a novel dosimetry system. Cranial CT was performed on a pediatric anthropomorphic phantom, with and without bismuth eye shields. A solid-state metal oxide semiconductor field effect transistor (MOSFET) dosimeter was used to obtain real-time dose measurements.


CONCLUSIONS
Bismuth shielding reduced radiation dose to the eye by up to 42%; shield artifact fell outside the diagnostic area of interest.
Mukundan
Srinivasan
S
Department of Radiology, Duke University Medical Center, DUMC Box 3808, Durham, NC 27705, USA.
Wang
Page Inman
PI
Frush
Donald P
DP
Yoshizumi
Terry
T
Marcus
Jeffrey
J
Kloeblen
Emily
E
Moore
Meredith
M
D001729:Bismuth; D001822:Body Burden; D002675:Child, Preschool; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005123:Eye / Q000000981:diagnostic imaging*; D006801:Humans; D011829:Radiation Dosage; D011835:Radiation Protection / Q000295:instrumentation* / Q000379:methods*; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D012062:Relative Biological Effectiveness; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed; D014173:Transistors, Electronic
D001729:Bismuth