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Radiation Doses from Small-Bowel Follow-Through and Abdominopelvic MDCT in Crohn's Disease

Tracy A. Jaffe1, Ana Maria Gaca, Susan Delaney, Terry T. Yoshizumi, Greta Toncheva, Giao Nguyen and Donald P. Frush

1 All authors: Department of Radiology, Duke University Medical Center, Erwin Rd., Box 3808, Durham, NC 27710.


Figure 1
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  		Fig. 1A —Anthropomorphic female phantom (Model 702-D, CIRS) used in study. Photograph shows phantom with metal-oxide semiconductor field-effect transistor (MOSFET) dosimeters in place.

 

Figure 2
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  		Fig. 1B —Anthropomorphic female phantom (Model 702-D, CIRS) used in study. Cross-section photograph of phantom shows dosimeter locations.

 

Figure 3
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  		Fig. 1C —Anthropomorphic female phantom (Model 702-D, CIRS) used in study. Photograph shows phantom on fluoroscopy table in preparation for fluoroscopic portion of examination.

 

Figure 4
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  		Fig. 1D —Anthropomorphic female phantom (Model 702-D, CIRS) used in study. Fluoroscopic image of phantom shows MOSFET dosimeters.

 

Figure 5
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  		Fig. 2 —CT scout image of phantom shows metaloxide semiconductor field-effect transistor (MOSFET) dosimeters in place.

 

Figure 6
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  		Fig. 3 —Bar graph shows distribution of imaging of 373 patients with Crohn's disease referred for small-bowel follow-through (SBFT) or CT in 10-year period. One patient underwent 34 CT examinations. Gray bars = SBFT, black bars = CT.

 

Figure 7
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  		Fig. 4 —Bar graph shows estimated effective dose from both small-bowel follow-through (SBFT) and CT examinations in patients with Crohn's disease. Cumulative effective dose for 10 CT examinations reaches 140 mSv. Gray bars = SBFT, black bars = CT.

 

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