[Clinical application of left ventricular volume and ejection fraction derived from gated SPECT data].
Left ventricular (LV) volume and ejection fraction (LVEF) derived from ECG-gated myocardial SPECT data are reproducible and objective. Those quantitative values, however, interacted according to varied factors such as a frame number per R-R interval, tracers, and processing-algorisms. A decrease of frame number per R-R interval yields underestimation of end-diastolic volume and overestimation of end-systolic volume, resulting in underestimation of LVEF. Thus, it is important to change a frame number per R-R interval by the examination purpose. A good correlation of LVEF is usually obtained, independent of a combination of tracer and processing-algorism. On the other hand, LV volume does not always show linearity between combinations of tracer and processing-algorism. An extraction of myocardial edge using QGS program is deteriorating in patients with small LV below 20 ml. It is crucial to assess LV functional values derived from ECG-gated SPECT data as clinical indices, taking the varied effects into consideration.
Cho
Keiichi
K
Kumita
Shin-ichiro
S
D000465:Algorithms; D002306:Cardiac Volume / Q000502:physiology*; D015637:Gated Blood-Pool Imaging; D006801:Humans; D009203:Myocardial Infarction / Q000000981:diagnostic imaging / Q000503:physiopathology; D009943:Organophosphorus Compounds; D015609:Organotechnetium Compounds; D019275:Radiopharmaceuticals; D013318:Stroke Volume / Q000502:physiology*; D015899:Tomography, Emission-Computed, Single-Photon; D016277:Ventricular Function, Left
D009943:Organophosphorus Compounds; D015609:Organotechnetium Compounds; D019275:Radiopharmaceuticals; C078700:technetium tc-99m tetrofosmin