### NCRP Report No. 160 Section 3 Pie Chart

### NCRP Report No. 160 Section 4 Pie Charts

**Fig. 4.2.**Percent contribution of various CT categories to total number of scans (67 million) (left) and*S*(440,000 person-Sv) (right) for 2006. The percent values have been rounded to the nearest 1 % [see Table 4.6 for the number of scans and the values for*S*(person-sievert)].**Fig. 4.3.**Percent contribution of various subcategories of conventional radiographic and fluoroscopic procedures to number of procedures (293 million) (left) and*S*(100,000 person-Sv) (right) for 2006. The percent values have been rounded to the nearest 1 %, except for those <1 % [see Table 4.7 for the number of procedures and the values for*S*(person- sievert)].**Fig. 4.4.**Percent contribution of various groups of interventional-fluoroscopic procedures to number of procedures (16,700,000) (left) and*S*(128,000 person-Sv) (right) for 2006. The percent values have been rounded to the nearest 1 % [see Table 4.9 for the number of procedures and the values for*S*(person-sievert)].**Fig. 4.10.**Percent contribution of various subcategories of nuclear- medicine procedures to number of patient visits (17,220,000) (left) and to*S*(220,500 person-Sv) (right) for 2005. The “other” subcategory includes thyroid, renal, brain and infection. Estimates for 2006 for number of procedures and*S*were projected from these data (Table 4.16). The percent values have been rounded to the nearest 1 % [see Table D.4 for the number of patient visits and see Table 4.15 for the values for*S*(person- sievert)].**Fig. 4.12.**Comparison of collective dose values for CT, conventional radiography and fluoroscopy, interventional fluoroscopy, and nuclear medicine (as percent of total collective dose) as reported for the early 1980s (123,700 person-Sv) (left) (NCRP, 1989a) and for 2006 (this Report) (899,000 person-Sv) (right). For*E*_{US}, the same percentages apply. Collective dose quantities are*S*for 2006 and collective HE for NCRP (1989a) [see Table 4.19 for values of the collective dose quantities (person-sievert) and*E*_{US}(millisievert) for each period].

### NCRP Report No. 160 Section 5 Pie Chart

### NCRP Report No. 160 Section 6 Pie Chart

### NCRP Report No. 160 Section 7 Pie Charts

**Fig. 7.3.**Percent contribution of various sources to*S*for occupational exposure (1,400 person-Sv) for 2006. Percent values have been rounded to the nearest 1 % [see Table 7.3 for the values of*S*(person-sievert)].**Fig. 7.6.**Contribution of the various subcategories to*S*(percent and person-sievert) for the medical category of occupational exposure for 2006. Total for*S*is 550 person-Sv. Percent values have been rounded to the nearest 1 %.**Fig. 7.8.**Contribution of the various subcategories to*S*(percent and person-sievert) for the industry and commerce category of occupational exposure for 2006. Total for*S*is 110 person-Sv. Percent values have been rounded to the nearest 1 %.**Fig. 7.12.**Contribution of the various subcategories to*S*(percent) for the government, DOE and military category of occupational exposure for 2006. Total for*S*is 39 person-Sv. Percent values have been rounded to the nearest 1 % [see Tables 7.6, 7.7, and 7.8 for the individual values of*S*(person-sievert)].

### NCRP Report No. 160 Section 8 Pie Charts

**Fig. 8.1.**Distribution of*S*or*E*_{US}for the categories of exposure for 2006. The percent values have been rounded to the nearest 1 %, except those <1 %. The total for*S*is 1,870,000 person-Sv and the total for*E*_{US}is 6.2 mSv, using a U.S. population of 300 million for 2006 [see Table 8.1 for the values of*S*(person-sievert) and*E*_{US}(millisievert)].**Fig. 8.2.**Distribution of*S*or*E*_{US}for the major sources of exposure for 2006. The percent values have been rounded to the nearest 1 %. The total for*S*is 1,870,000 person-Sv and the total for*E*_{US}is 6.2 mSv, using a U.S. population of 300 million for 2006. The other background category consists of the external (space and terrestrial) and internal subcategories [see Table 8.1 for the values of*S*(person-sievert) and*E*_{US}(millisievert)].**Fig. 8.3.**Distribution of*S*or*E*_{US}for the categories of exposure for the early 1980s (NCRP, 1987a). The percent values have been rounded to the nearest 1 %, except those <1 %. The total for*S*is 835,000 person-Sv and the total for*E*_{US}is 3.6 mSv, using a U.S. population of 230 million for the early 1980s [see Table 8.2 for the values of*S*(person-sievert) and*E*_{US}(millisievert)].**Fig. 8.4.**Distribution of*S*or*E*US for the major sources of exposure for the early 1980s (NCRP, 1987a). The percent values have been rounded to the nearest 1 %. The total for*S*is 835,000 person-Sv and the total for*E*_{US}is 3.6 mSv, using a U.S. population of 230 million for 1980 [see Table 8.2 for the values of*S*(person-sievert) and*E*_{US}(millisievert)].