Clinical application and quantitative evaluation of generator-produced copper-62-PTSM as a brain perfusion tracer for PET.
J Nucl Med
; 35(12): 1910-5, 1994 Dec.
Article
em En
| MEDLINE
| ID: mdl-7989968
ABSTRACT
UNLABELLED Copper-62-pyruvaldehyde bis(N4-methylthiosemicarbazone) copper II (62Cu-PTSM) has been proposed as a generator-produced positron-emitting tracer for perfusion imaging. To evaluate the characteristics of 62Cu-PTSM as a cerebral perfusion tracer, brain PET images of 62Cu-PTSM were compared with cerebral blood flow (CBF). METHODS:
Following an intravenous injection of 62Cu-PTSM, a serial dynamic PET scan was performed for 10 min with arterial sampling in 10 subjects. CBF was measured by 15O-labeled water before the 62Cu-PTSM study.RESULTS:
Dynamic PET scan with octanol-extracted arterial input function indicated the presence of significant back-diffusion of 62Cu-PTSM from the brain within 3 min after injection, followed by stable activity from 3 to 10 min. Comparison with 15O-water PET demonstrated less contrast between high- and low-flow regions in 62Cu-PTSM image and a nonlinear relationship of flow and 62Cu-PTSM uptake, which suggests the underestimation of CBF in high-flow regions due to the existence of back-diffusion.CONCLUSION:
Although 62Cu-PTSM can be used widely for evaluation of brain perfusion with PET, kinetic analysis and correction may be needed to quantify regional CBF.
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Base de dados:
MEDLINE
Assunto principal:
Compostos Organometálicos
/
Tiossemicarbazonas
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Radioisótopos de Cobre
/
Tomografia Computadorizada de Emissão
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Circulação Cerebrovascular
Limite:
Adolescent
/
Adult
/
Aged
/
Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
J Nucl Med
Ano de publicação:
1994
Tipo de documento:
Article
País de afiliação:
Japão