Journal of nuclear medicine : official publication, Society of Nuclear Medicine
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Comparative Study
Peak rate of left-ventricular ejection by a gated radionuclide technique: correlation with contrast angiography.
Gated radionuclide cardiac blood-pool imaging can produce reliable estimates of left-ventricular (LV) volume and ejection fraction. The ventricular volume curve can be used to develop normalized ejection rates, since count volumes and framing times are known. ⋯ The mean intraobserver variation was (plus or minus 12%) and the mean interobserver variation plus or minus 0.33 end-diastolic volumes per sec (plus or minus 13%). We conclude that maximum dv/dt may be derived from gated blood images, with reasonable accuracy and modest variability.
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Case Reports
Computerized double-tracer subtraction scanning with gallium-67 citrate in inflammatory diseases.
A gallium-67/technetium-99m subtraction technique was used with a variable weighting factor. That is, each image was separately set to 100%. ⋯ Thirty of these patients had abnormal Tc-99m pyrophosphate bone scans, while 20 had abnormal radiogallium abdominal foci; 45 had defects in liver, spleen, or kidney images. The subtraction technique with variable weighting was highly successful in enhancing hot-spot visibility, and in providing information as to the anatomic location of the defect.
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Case Reports
Persistent dural cerebrospinal fluid leak shown by retrograde radionuclide myelography: case report.
Following inadvertent spinal anesthesia for delivery, a patient developed incapacitating post-lumbar puncture headache that persisted for 9 weeks. Scintigrams of the lumbar region, obtained after injection of 99mTC-human serum albumin into the cisterna magna, showed the cerebrospinal fluid leak. ⋯ Because of subsequent atypical headaches, a second cisternogram was done by the same technique. This study confirmed that there was no further dural leak, and other evidence indicated that the recurrent headache was related to functional problems.