Table 5.

Estimated annual number of CT examinations for men (a) and for women (b) in Japan for each age range and anatomical locations scanned (*10⁶).

	Age range (yo)
CT examination	0-19	20-29	30-39	40-49	50-59	60-69	70-79	80-	Total
Head	0.10	0.17	0.23	0.29	0.50	0.73	1.14	1.34	4.50
Face	0.11	0.04	0.04	0.05	0.09	0.13	0.16	0.08	0.70
Neck	0.00	0.08	0.27	0.59	0.97	1.14	0.96	0.50	4.51
Chest	0.09	0.06	0.22	0.42	0.90	1.21	1.30	1.30	5.50
Upper abdomen	0.00	0.09	0.22	0.39	0.76	1.03	1.16	0.94	4.59
Lower abdomen	0.00	0.03	0.05	0.09	0.16	0.21	0.24	0.22	1.00
Total	0.30	0.47	1.03	1.83	3.38	4.45	4.96	4.38	20.80