Multisegmental image reconstruction for MSCT significantly improved agreement with MR imaging for left ventricular volumes and ejection fraction compared to standard reconstruction.
Cross-Sectional (n=15)
Does multisegmental image reconstruction improve the assessment of left ventricular function using MSCT compared to standard reconstruction and MRI?
Multisegmental image reconstruction improves the quantitative and qualitative assessment of left ventricular function using MSCT compared to standard reconstruction, showing better agreement with MRI.
PURPOSE: To assess the value of different image reconstruction algorithms for assessment of the left ventricular function using retrospectively ECG-gated multislice spiral computed tomography (MSCT) of the heart. MATERIAL AND METHODS: MSCT and cine magnetic resonance (MR) imaging of the heart were performed in 15 patients. For MSCT, standard and multisegmental image reconstruction with improved temporal resolution were used. Standardized multiplanar reformats in the short axis and long axis views were reconstructed from MSCT data. End-systolic (ESV) and end-diastolic volume (EDV), stroke volume (SV), ejection fraction (EF) and myocardial mass (MM) were calculated. Left ventricular wall motion was assessed qualitatively. RESULTS: MSCT was in acceptable agreement with MR imaging for quantification of the ventricular function. According to the Bland-Altman approach the mean differences for the left ventricular volumes (ESV, EDV, SV) ranged from -9.6 ml to 3.1 ml with standard image reconstruction and from -0.6 ml to 1.9 ml utilizing multisegmental image reconstruction with limits of agreement ranging from -26.6 ml to 12.5 ml and -15.6 ml to 15.0 ml, respectively. Applying the multisegmental image reconstruction algorithm, a significantly improved agreement with the MR data was found for EDV, SV and EF. For wall motion analysis, standard image reconstruction showed a significant difference to MR imaging with a correspondence in 83.75% of the 240 assessed segments, while multisegmental image reconstruction agreed with MR imaging in 92.5% of the segments. CONCLUSION: Multisegmental image reconstruction improves the quantitative assessment of left ventricular function when compared to standard image reconstruction. Multisegmental image reconstruction allows qualitative wall motion analysis.
Mahnken et al. (2003) conducted a cross-sectional in Left ventricular function assessment (n=15). MSCT with multisegmental image reconstruction vs. MSCT with standard image reconstruction and cine MR imaging was evaluated on Left ventricular volumes (ESV, EDV, SV), ejection fraction, myocardial mass, and wall motion. Multisegmental image reconstruction for MSCT significantly improved agreement with MR imaging for left ventricular volumes and ejection fraction compared to standard reconstruction.