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Pediatric Body MDCT: A 5-Year Follow-Up Survey of Scanning Parameters Used by Pediatric Radiologists

Michael E. Arch1 and Donald P. Frush1

1 Both authors: Department of Radiology, Division of Pediatric Radiology, Duke University Medical Center, 1905 McGovern-Davison Children's Health Center, Box 3808 DUMC, Durham, NC 27710.


Figure 1
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  		Fig. 1 —Estimated number of pediatric patients (< 18 years) undergoing body CT (chest or abdomen [includes pelvis]) examinations per day. CT of chest and abdomen (or abdomen and pelvis) was considered two studies. Results of 2001 [8] and 2006 surveys are compared.

 

Figure 2
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  		Fig. 2 —Peak kilovoltage routinely used for pediatric chest MDCT. Amount used has decreased from 2001 [8] to 2006, with 100% of those indicating a value in 2006 survey selecting 120 kVp or less (p < 0.001).

 

Figure 3
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  		Fig. 3 —Peak kilovoltage routinely used for pediatric abdominal MDCT. Amount used has decreased from 2001 [8] to 2006, with 100% of those indicating a value in 2006 survey selecting 120 kVp or less (p < 0.001).

 

Figure 4
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  		Fig. 4 —Tube current routinely used for pediatric chest MDCT. Compared with 2001, there has been a trend to use less tube current in children ranging in age from 0 to 4 years. No respondents from current survey selected tube current value of 150 mA or more. Mean tube current between 2001 [8] and 2006 was significantly lower (p < 0.0001), as they were for abdominal MDCT in children 5–8 and 9–12 years old.

 

Figure 5
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  		Fig. 5 —Tube current routinely used for pediatric abdominal MDCT in children ranging in age from 0 to 4 years. Since prior survey [8], amount of tube current used has decreased. For example, 24% of respondents use less than 50 mA compared with 0% in 2001. Mean tube current between 2001 [8] and 2006 was significantly lower (p < 0.0001), as they were for abdominal MDCT in children 5–8 and 9–12 years old.

 

Figure 6
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  		Fig. 6 —Tube current routinely used for pediatric chest MDCT. Even in older children, trend was to use less tube current since 2001 [8]. For example, 71% of respondents selected tube current value less than 150 mA compared with 40% in 2001.

 

Figure 7
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  		Fig. 7 —Tube current routinely used for pediatric abdominal CT. Even in older children, trend was to use less tube current. For example, 57% of respondents selected tube current value less than 150 mA compared with 21% in 2001 [8].

 

Figure 8
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  		Fig. 8 —Mean tube current used by members of Society for Pediatric Radiology for pediatric chest MDCT over several age ranges compared with 2001 [8]. Mean tube current used decreased between 32 and 61 mA for each age range.

 

Figure 9
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  		Fig. 9 —Mean tube current used by members of Society for Pediatric Radiology for pediatric abdominal MDCT over several age ranges compared with 2001 [8]. Mean tube current decreased between 31 and 55 for each age range.

 

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