Table 3.

Summary of mean organ doses per hospital for each CT examination

	Mean organ doses per hospital (mGy)
Selected organ	AGKH	BMC	KCMC	MMH	MNH	RMC	SHMH	TMJH
(a) Head
RBM a	$2.4\pm 1.0$	$3.9\pm 1.5$	$3.4\pm 1.1$	$5.8\pm 1.7$	$3.3\pm 0.5$	$2.1\pm 0.3$	$2.9\pm 0.5$	$4.5\pm 1.1$
brain	$37.5\pm 16.1$	$62.6\pm 23.4$	$52.0\pm 1.0$	$84.4\pm 22.6$	$51.2\pm 9.5$	$32.5\pm 4.8$	$48.4\pm 8.5$	$72.1\pm 16.5$
eye lens	$41.0\pm 21.0$	$75.0\pm 28.1$	$57.0\pm 10.1$	$110.3\pm 35.2$	$53.6\pm 11.1$	$40.2\pm 6.3$	$92.8\pm 9.6$	$92.5\pm 21.0$
Thyroid	$1.6\pm 0.8$	$2.4\pm 1.0$	$2.5\pm 1.0$	$4.7\pm 1.5$	$2.3\pm 0.4$	$1.5\pm 0.4$	$2.3\pm 1.1$	$3.0\pm 1.0$
(b) Chest
RBM a	$7.8\pm 3.2$	$12.4\pm 4.4$	$7.0\pm 0.5$	$10.7\pm 6.0$	$10.3\pm 2.6$	$7.9\pm 0.1$	$11.4\pm 0.8$	$11.6\pm 1.0$
lung	$20.1\pm 6.3$	$44.0\pm 7.9$	$24.0\pm 0.0$	$25.3\pm 10.1$	$34.6\pm 12.7$	$31.5\pm 3.5$	$36.0\pm 5.7$	$38.9\pm 2.1$
breast	$14.8\pm 0.0$	$36.0\pm 8.1$	$20.0\pm 0.0$	$21.0\pm 8.1$	$29.6\pm 17.1$	$29.5\pm 0.7$	$31.0\pm 1.4$	$33.1\pm 1.0$
Thyroid	$21.5\pm 0.0$	$9.0\pm 2.7$	$4.9\pm 0.0$	$4.6\pm 0.0$	$8.7\pm 2.1$	$3.5\pm 1.9$	$12.1\pm 1.0$	$9.3\pm 1.2$
esophagus	$23.3\pm 0.0$	$50.0\pm 5.5$	$27.0\pm 0.0$	$27.0\pm 0.0$	$52.0\pm 5.5$	$42.5\pm 0.7$	$68.0\pm 0.0$	$43.6\pm 0.8$
(c) Abdomen
liver	$26.1\pm 10.1$	$42.8\pm 5.2$	$21.0\pm 1.4$	$28.0\pm 4.2$	$41.6\pm 6.2$	$33.0\pm 1.4$	$40.5\pm 10.2$	$30.7\pm 6.5$
stomach	$28.5\pm 10.9$	$46.4\pm 6.0$	$22.5\pm 0.7$	$28.0\pm 3.5$	$42.4\pm 6.5$	$36.0\pm 0.0$	$42.7\pm 11.6$	$32.3\pm 6.9$
pancreas	$24.9\pm 9.8$	$39.6\pm 4.9$	$18.5\pm 0.7$	$26.0\pm 6.0$	$37.9\pm 5.5$	$31.0\pm 1.4$	$44.7\pm 13.5$	$28.7\pm 6.2$
spleen	$26.8\pm 10.4$	$42.1\pm 5.3$	$20.5\pm 0.7$	$28.0\pm 1.9$	$41.5\pm 6.0$	$33.0\pm 2.3$	$37.9\pm 9.4$	$30.5\pm 6.2$
kidney	$32.0\pm 12.6$	$51.6\pm 7.5$	$25.0\pm 0.5$	$30.0\pm 5.0$	$44.6\pm 7.2$	$39.0\pm 1.7$	$47.3\pm 13.6$	$47.3\pm 7.2$
adrenal	$26.4\pm 10.4$	$40.1\pm 5.2$	$18.5\pm 0.7$	$26.0\pm 2.8$	$40.3\pm 5.6$	$32.0\pm 1.4$	$49.4\pm 14.3$	$29.7\pm 6.1$
gland
(d) Lumbar spine
large	$32.4\pm 2.4$	$29.0\pm 9.2$	$9.6\pm 3.0$	$21.1\pm 1.1$	$9.4\pm 3.8$	$11.5\pm 0.5$	$17.9\pm 0.0$	$17.4\pm 7.3$
intestine
small	$32.9\pm 3.5$	$28.0\pm 6.2$	$10.5\pm 2.7$	$22.4\pm 1.3$	$11.9\pm 3.9$	$11.5\pm 0.7$	18.1 ±0.0	$18.0\pm 6.2$
intestine
colon	$17.8\pm 4.6$	$8.8\pm 3.2$	$8.3\pm 2.3$	$18.3\pm 1.4$	$8.5\pm 2.3$	$5.2\pm 0.6$	$9.3\pm 3.4$	$12.0\pm 2.8$
gonads	$8.2\pm 10.8$	$7.4\pm 2.6$	$11.7\pm 6.9$	$11.5\pm 11.2$	$8.1\pm 5.7$	$9.0\pm 1.8$	$2.6\pm 3.1$	$12.6\pm 10.4$
uterus	$28.6\pm 7.3$	$6.2\pm 2.1$	$15.6\pm 8.2$	$27.3\pm 2.8$	$11.9\pm 5.9$	$8.7\pm 3.1$	$14.4\pm 6.5$	$19.0\pm 5.8$
(e) Pelvis
ovaries	$21.0\pm 1.0$	$23.0\pm 0.0$	$16.4\pm 5.1$	$21.8\pm 0.0$	32.2 ±0.0	—	—	$39.7\pm 16.2$
bladder	$26.0\pm 13.5$	$26.0\pm 0.0$	$19.5\pm 6.4$	$25.0\pm 0.0$	$38.0\pm 0.0$	—	—	$38.6\pm 24.7$
uterus	$23.4\pm 11.8$	$26.0\pm 0.0$	$17.5\pm 4.9$	$23.0\pm 0.0$	$34.0\pm 0.0$	—	—	$42.7\pm 18.1$
Testis	$11.2\pm 16.0$	$5.0\pm 0.0$	—	$7.6\pm 0.0$	$7.0\pm 0.0$	—	—	$16.7\pm 11.4$

^a $\text{RBM}=\text{red}\hspace{0.17em}\text{bone}\hspace{0.17em}\text{marrow}$.