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4 results for “Iomazenil”
Data from: Increase in extraction of I-123 iomazenil in patients with chronic cerebral ischemia
Background: Cerebral extraction of diffusively distributed substances like oxygen has been suggested to change according to the cerebral blood flow (CBF) and status of the microvasculature. The relationships between the cerebral extraction of diffusively distributed lipophilic tracers and the severity of cerebral ischemia has not yet been clarified. In the present study, we attempted to elucidate the association between the extraction fraction of the lipophilic tracer I-123 iomazenil (IMZ) (IMZ-EF) and the oxygen extraction fraction (OEF) derived from O-15 PET in patients with chronic steno-occlusive disease of internal carotid artery (ICA) or middle cerebral artery (MCA). Methods: Seven patients with unilateral chronic severe stenosis or occlusion of the middle cerebral/internal cerebral artery were prospectively recruited for this study. All the patients underwent both O-15 PET and quantitative I-123 IMZ SPECT. Parametric images derived from the PET and SPECT scans were anatomically normalized and evaluated by automated image analysis based on the volume-of-interest template. Results: The asymmetry index (AI) of IMZ-EF was shown to significantly correlated with the AI of OEF (r = 0.562, P < 0.001) in the internal carotid artery perfusion area. Strong and significant correlation between the AI of the influx rate constant K1 of IMZ and the AI of the cerebral metabolic rate of oxygen (r = 0.552, P = 0.001) was clarified. Conclusions: Our results suggested that the transportation efficiency of I-123 IMZ into the brain tissue was an indicator for evaluating severity of cerebral ischemia in patients with chronic steno-occlusive disease of ICA or MCA. Cerebral metabolic state can possibly be estimated by I-123 IMZ SPECT without cyclotron.
Data from: Increase in extraction of I-123 iomazenil in patients with chronic cerebral ischemia
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Ability of Partial Inverse Agonist, Iomazenil, to Block Ethanol Effects in Humans
ClinicalTrials.gov study NCT01590277. IPD Sharing: NO. Countries: 1. Publications: 0.
Effects of Delta-9-THC and Iomazenil in Healthy Humans
ClinicalTrials.gov study NCT00982982. IPD Sharing: Not stated. Countries: 1. Publications: 0.
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