Comparative study of regional cerebral blood flow images by SPECT using xenon-133, iodine-123 IMP, and technetium-99m HM-PAO.
Regional cerebral blood flow (rCBF) was measured by single photon emission computed tomography (SPECT) using 133Xe, N-isopropyl-p-[123I]iodoamphetamine ([123I]IMP) and [99mTc] hexamethylpropyleneamine oxime ([99mTc]HM-PAO) in 24 patients with cerebrovascular diseases. The greatest advantage of 133Xe SPECT was to be able to provide absolute rCBF values without arterial sampling. However, its image quality was very poor. Iodine-123 IMP SPECT provided rCBF images of higher quality and it had good correlation to 133Xe SPECT. Iodine-123 IMP SPECT provided the best images to detect mild ischemic lesions. It could detect obstructive or stenotic changes of large cerebral arteries very well except for a moderate stenosis of internal carotid artery. Technetium-99m HM-PAO SPECT also provided very good rCBF images and it had good correlation to 133Xe SPECT. However, the count-density ratios for the ischemic lesions to the contralateral presumed normal areas of [99mTc] HM-PAO SPECT were significantly higher than those of [123I]IMP SPECT.
Nakano
S
S
Department of Neurosurgery, Miyazaki Medical College, Japan.
Kinoshita
K
K
Jinnouchi
S
S
Hoshi
H
H
Watanabe
K
K
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000662:Amphetamines; D002560:Cerebrovascular Circulation; D002561:Cerebrovascular Disorders / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D007457:Iodine Radioisotopes; D020367:Iofetamine; D008297:Male; D008875:Middle Aged; D009942:Organometallic Compounds; D010091:Oximes; D013667:Technetium; D019690:Technetium Tc 99m Exametazime; D014055:Tomography, Emission-Computed; D014980:Xenon Radioisotopes
D000662:Amphetamines; D007457:Iodine Radioisotopes; D009942:Organometallic Compounds; D010091:Oximes; D014980:Xenon Radioisotopes; D019690:Technetium Tc 99m Exametazime; D013667:Technetium; D020367:Iofetamine