Measurement of left ventricular volumes and function with O-15-labeled carbon monoxide gated positron emission tomography: comparison with magnetic resonance imaging.
BACKGROUND
Positron emission tomography (PET) with inhaled oxygen 15-labeled carbon monoxide (CO) is used as a marker of myocardial blood pool. Only a limited number of studies with small numbers of patients have reported on the assessment of left ventricular (LV) volumes by use of O-15-labeled CO. The aim of this study was to compare LV volumes and function as measured by routinely acquired blood pool images by use of gated O-15-labeled CO PET with the reference technique, cardiovascular magnetic resonance imaging (MRI).


RESULTS
Thirty-four subjects with a varying degree of LV function were studied. LV end-diastolic volume (LVEDV), LV end-systolic volume (LVESV), and LV ejection fraction (LVEF) were determined by both MRI and gated PET by use of O-15-labeled CO. Volumes were comparable with respect to LVEDV (196 +/- 83 and 192 +/- 91 mL, respectively; P = not significant). LVESV, however, was slightly overestimated by PET (119 +/- 85 and 136 +/- 94 mL, respectively; P < .05), resulting in a significant underestimation of LVEF (44% +/- 19% and 35% +/- 18%, respectively; P < .05). Observed correlations for LVEDV, LVESV, and LVEF were 0.90, 0.96, and 0.86, respectively (all P < .01).


CONCLUSIONS
Gated O-15-labeled CO PET measurements of LVEDV, LVESV, and LVEF show good correlation with MRI over a wide range of LV volumes during routinely acquired blood pool images. LVEF, however, may be underestimated compared with MRI.
Hofman
Hadassa A
HA
Department of Cardiology, VU University Medical Center, Amsterdam, The Netherlands.
Knaapen
Paul
P
Boellaard
Ronald
R
Bondarenko
Olga
O
Götte
Marco J W
MJ
van Dockum
Willem G
WG
Visser
Cees A
CA
van Rossum
Albert C
AC
Lammertsma
Adriaan A
AA
Visser
Frans C
FC
D000328:Adult; D002248:Carbon Monoxide; D002311:Cardiomyopathy, Dilated / Q000150:complications / Q000000981:diagnostic imaging; D003324:Coronary Artery Disease / Q000150:complications / Q000000981:diagnostic imaging; D005260:Female; D015637:Gated Blood-Pool Imaging / Q000379:methods*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D010104:Oxygen Radioisotopes; D049268:Positron-Emission Tomography / Q000379:methods*; D019275:Radiopharmaceuticals; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013318:Stroke Volume; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging* / Q000209:etiology
D010104:Oxygen Radioisotopes; D019275:Radiopharmaceuticals; D002248:Carbon Monoxide