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). METHODS AND 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.
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). METHODS AND 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.
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Authors: Paul Knaapen; Mark Lubberink; Luuk J Rijzewijk; Rutger W van der Meer; Michiel Unger; Tjeerd Germans; Jeroen J Bax; Jan W A Smit; Hildo J Lamb; Albert C van Rossum; Michaela Diamant; Frans C Visser; Adriaan A Lammertsma Journal: J Nucl Cardiol Date: 2008 Mar-Apr Impact factor: 3.872