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National Conference on Dose Reduction in CT, with an Emphasis on Pediatric Patients

Otha W. Linton1 and Fred A. Mettler, Jr.2

1 National Council on Radiation Protection and Measurements, Ste. 400, 7910 Woodmont Ave., Bethesda, MD 20814-3095.
2 University of New Mexico Health Sciences Center, 915 Camino de Salud, N.E., Albuquerque, NM 87131-0001.



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Fig. 1. —Illustration of CT system geometry shows intersection of X-ray beam with dosimetry phantom. Insert indicates idealized dose profile measured along line AB. (Courtesy of Shope TB, Food and Drug Administration's Center for Devices and Radiological Health, Gaithersburg, MD)

 


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Fig. 2. —Illustration of multiple scan dose profile shows results from series of 14 scans with increment equal to slice thickness (T). Multiple scan average dose (MSAD) is given by CT dose index (CTDI) indicated at central portion of multiple scan dose profile. (Courtesy of Shope TB, Food and Drug Administration's Center for Devices and Radiological Health, Gaithersburg, MD)

 

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