Geometric determination of left ventricular volume from gated blood-pool studies using a slant-hole collimator
A geometric method of measuring absolute left ventricular volumes from gated blood-pool studies obtained in a single-plane modified left anterior oblique view was evaluated prospectively in 30 patients who also underwent single-plane contrast ventriculography. The gated studies used a 30 degrees straight-bore slant-hole collimator with the holes slanted caudally. Left ventricular end-diastolic volume was calculated using the area-length method, with semiautomatic definition of the left ventricular region of interest and the maximum length of the left ventricle. Ejection fraction was determined from the left ventricular time/activity curve. The left ventricular end-systolic volume was derived using the end-diastolic volume and ejection fraction. Correlation coefficients between the two methods were 0.93 for end-diastolic volume, 0.95 for end-systolic volume, and 0.91 for ejection fraction. This method provided accurate and highly reproducible measurements of actual left ventricular volumes and was easily applicable in routine clinical studies.
- Research Organization:
- Department of Nuclear Medicine, Royal Prince Alfred Hospital, Camperdown, N.S.W., Australia
- OSTI ID:
- 5855682
- Journal Information:
- Radiology; (United States), Journal Name: Radiology; (United States) Vol. 147:2; ISSN RADLA
- Country of Publication:
- United States
- Language:
- English
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