APPENDIX 1

Exposure Doses in Head Region According to MIRD Method

Organ	¹¹¹In-diethylenetriaminepentaacetic acid	N-isopropyl-4-iodoamphetamine(¹²³I) hydrochloride	¹²³I-iomazenil	^99mTc-ethyl cysteinate dimer
Brain	41	0.84	0.44	0.0051
Body	1.5	0.38	0.17	0.001

Organ-absorbed doses are given in mGy/37 MBq, except for ^99mTc-ethyl cysteinate dimer, which is given in mGy/Bq.