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U.S. Department of Energy
Office of Scientific and Technical Information

Quantifying the size of ischemic, infarcted, healing and/or scarred myocardium. Annual report, 30 Jun 1975--15 Apr 1976

Technical Report ·
OSTI ID:7312188
A portable gamma camera was procured, made operational and outfitted with a digital tape storage and retrieval system compatible with an IBM 370 computer for image enhancement and image subtraction. Preliminary results on processed tapes are very encouraging. Cyclotron production of Thallium-201 has progressed as anticipated and current yields of medically useful radiopharmaceutical average 22 mCi per week. Dual isotope imaging using Thallium-201 followed by (99m)Tc-diphosphonate or pyrophosphate has been performed in 35 patients with acute myocardial infarction. Image quality is excellent. Studies in dogs have shown advantages in use of (99m)Tc pyrophosphate compared to diphosphonate; that regional hypoxic myocardium simulates myocardial infarction with Thallium-201 but not with (99m)Tc diphosphonate or pyrophosphate; and that differences in image quality between (201)Tl and (99m)Tc EHDP may be explained in part by the severity and extent of cellular damage and the degree of perfusion abnormality in the microcirculation.
Research Organization:
Cincinnati Univ., OH (USA). Coll. of Medicine
OSTI ID:
7312188
Report Number(s):
PB-262335
Country of Publication:
United States
Language:
English