Nuclear Cardiology: Nuclear Cardiology:

Chapter 14 / Artifacts and Technical Problems in Cardiac Imaging 231%Fig. 14-100. Computer screen display of processed data of the ERNA studyshown in Fig. 14-99. The bottom panel at the left shows the end diastolic (ED)and end systolic (ES) regions of interest for calculation of ejection fraction (EF),as well as the crescent-shaped background region to the right of the left ventricularlateral wall. At the top in the same panel functional images are shown thatmay be used as guides for processing. The top panel on the left shows the countbasedleft ventricular volume curve. The curve has an appropriate physiologicshape. Diastolic filling appears to be relatively slow. The top right panel showscalculated parameters. EF is calculated to be low normal, 49%. Early peakfilling rate (EPFR) is 1.19 ED volume/s. The counts in the ED frame (FRM) are16,922 counts, ensuring good statistical reliability. The ED volume is enlargedat 198 mL. The bottom right panel shows values for regional ejection fraction(REF). Overall, this study shows normal right ventricular function. Slightlyenlarged left ventricle with preserved low normal EF and decreased diastolicfunction.