Myocardial Oxygen Extraction Fraction Measured Using Bolus Inhalation of 15O-Oxygen Gas and Dynamic PET
نویسندگان
چکیده
منابع مشابه
Shorter examination method for the diagnosis of misery perfusion with count-based oxygen extraction fraction elevation in 15O-Gas PET.
UNLABELLED (15)O-Gas PET is useful for evaluating hemodynamic status in patients with ischemic cerebrovascular disease. To reduce examination time and exposure to radioactive gas, we assessed a count-based method with shorter continuous (15)O(2) gas inhalation. METHODS Twenty-five patients (66 +/- 13 [mean +/- SD] y old) with unilateral cerebrovascular stenoocclusive disease were examined by ...
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A new approach to the assessment of regional myocardial blood flow and fractional oxygen extraction has been developed using 15O-water (H2-15O) and 15O-hemoglobin (15O-Hb). Bolus doses (1 mCi) of H2-15O and 15O-Hb were injected 10 minutes apart into the left main coronary artery of 12 normal dogs. Sequential images of regional myocardial tracer clearance were obtained over 5 minutes with a posi...
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Use of 15O labeled oxygen (15O2) and positron emission tomography (PET) allows quantitative assessment of the regional metabolic rate of oxygen (CMRO2) in vivo, which is essential to understanding the pathological status of patients with cerebral vascular and neurological disorders. The method has, however, been challenging, when a 3D PET scanner is employed, largely attributed to the presence ...
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A patient with migraine who had a permanent visual field defect was studied by angiography and CT scan. He also had a tomographic study of cerebral blood flow (CBF) and oxygen extraction fraction (EO2) using the non-invasive continuous oxygen-15 (15O) inhalation technique. Angiography was normal. CT scan revealed an area of decreased density with contrast enhancement suggestive of a recent infa...
متن کاملQuantitative evaluation of oxygen metabolism in the intratumoral hypoxia: 18F-fluoromisonidazole and 15O-labelled gases inhalation PET
BACKGROUND Intratumoral hypoxia is one of the resistant factors in radiotherapy and chemotherapy for cancer. Although it is detected by 18F-fluoromisonidazole (FMISO) PET, the relationship between intratumoral hypoxia and oxygen metabolism has not been studied. The purpose of this study was to evaluate the intratumoral perfusion and oxygen metabolism in hypoxic regions using the rat xenograft m...
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ژورنال
عنوان ژورنال: Journal of Nuclear Medicine
سال: 2010
ISSN: 0161-5505,2159-662X
DOI: 10.2967/jnumed.110.080408