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MOSFET Dosimetry for Radiation Dose Assessment of Bismuth Shielding of the Eye in Children

Srinivasan Mukundan, Jr.1, Page Inman Wang, Donald P. Frush, Terry Yoshizumi, Jeffrey Marcus, Emily Kloeblen and Meredith Moore

1 All authors: Department of Radiology, Duke University Medical Center, DUMC Box 3808, Durham, NC 27705.


Figure 1
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  		Fig. 1 —Photograph of pediatric anthropomorphic phantom with bismuth eye shield and metal oxide semiconductor field effect transistor (MOSFET) dosimeters deployed.

 

Figure 2
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  		Fig. 2 —Bar graph shows radiation dose (cGy) to eye globe and lens versus energy (kVp). Vertical lines represent SDs.

 

Figure 3
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  		Fig. 3A —CT images of pediatric anthropomorphic phantom. Axial bone window setting image of bismuth shield (high density, ventral to orbits) and of step-off pad (intermediate density, ventral to orbits).

 

Figure 4
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  		Fig. 3B —CT images of pediatric anthropomorphic phantom. Because significant artifact was not present using conventional bone window setting (A), windows were artificially widened to show artifact (arrows). Bismuth shield with step-off pad successfully deflected artifact away from regions of anatomic interest.

 

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