Assessment of regional left ventricular function by dual source computed tomography: interobserver variability and...

Area of Science:

• Cardiology
• Radiology
• Medical Imaging

Background:

• Left ventricular function assessment is crucial but can be hindered by motion artifacts in cardiac CT.
• Dual Source Computed Tomography (DSCT) offers high temporal resolution to minimize motion artifacts.

Purpose of the Study:

• To evaluate the accuracy of DSCT in detecting regional left ventricular wall motion abnormalities.
• To compare DSCT findings with invasive cine angiocardiography.

Main Methods:

• DSCT datasets from 50 patients were analyzed for regional wall motion abnormalities.
• Data were reconstructed at 10 time instants and assessed by two independent readers.
• DSCT findings were validated against cine ventriculography using a 7-segment model.

Main Results:

• DSCT demonstrated high agreement between observers (97% per segment, 96% per patient).
• For patient-based detection of abnormalities, DSCT achieved 95% sensitivity and 96% specificity.
• For segment-based detection, DSCT showed 88% sensitivity and 98% specificity.

Conclusions:

• DSCT is a highly accurate method for detecting regional left ventricular wall motion abnormalities.
• The technique offers high interobserver agreement, sensitivity, and specificity.
• Per-patient analysis yielded higher sensitivity and positive predictive value than per-segment analysis.