Table 1:

Doses measured for all protocols on 64-row scanner (Toshiba Aquilion 64)

Organ	W (T)	Noncontrast Head CT		Perfusion		CTA
		Dose (mGy)	Weighted Dose (mSv)	Dose (mGy)	Weighted Dose (mSv)	Dose (mGy)	Weighted Dose (mSv)
Hemispheres	0.01	33.31	0.33	66.22	0.66	24.34	0.24
Skin (within scan area)		33.17		75.41		26.27
Skin (total)	0.01	17.43	0.17	37.9	0.38	13.87	0.14
Eye lenses		41.69		6.74		14.86
Pituitary gland		33.7		14.26		20.07
Bone marrow (scan area)		8.4		4.1		22.05
Bone marrow (total)	0.12	4.6	0.56	2.36	0.28	11.88	1.43
Thyroid gland	0.04	1.49	0.06	1.04	0.04	39.17	1.57
Lung	0.12	0.8	0.1	0.48	0.06	2.99	0.36
Esophagus	0.04	0.36	0.01	0.55	0.02	2.78	0.11
Breast	0.12	1.69	0.2	0.39	0.05	1.47	0.18
Liver	0.05	0.37	0.02	0.28	0.01	0.94	0.05
Stomach	0.12	0.53	0.06	0.44	0.05	0.92	0.11
Ovaries	0.08	0.28	0.02	0.33	0.03	0.35	0.03
Lower colon	0.12	0.74	0.09	0.28	0.03	0.24	0.03
Bladder	0.04	0.73	0.03	0.34	0.01	0.57	0.02
Testes	0.08	0.31	0.02	0.27	0.02	0.28	0.02
Effective dose (women)			1.65		1.62		4.27
Effective dose (men)			1.65		1.61		4.26