Assessment of left ventricular function and mass by MR imaging: a stereological study based on the systematic slice...

Area of Science:

• Cardiovascular Imaging
• Medical Physics
• Quantitative Anatomy

Background:

• Accurate volumetric and functional analysis of the left ventricle (LV) is crucial for diagnosing and managing cardiac diseases.
• Traditional methods for LV analysis using cardiac magnetic resonance (MR) imaging can be time-consuming.

Purpose of the Study:

• To integrate stereological techniques with cardiac MR imaging for efficient LV volumetric and functional assessment.
• To evaluate the accuracy and repeatability of stereological estimations compared to reference methods.

Main Methods:

• Cardiac MR imaging was performed on 13 patients with suspected coronary artery disease.
• Stereology was employed to estimate LV end-diastolic volume (EDV), ejection fraction (EF), and mass using systematic sampling intensities (1/2 and 1/3) of MR slices.
• Stereological results were compared against manual delineations of endocardial and epicardial contours.

Main Results:

• Stereological EDV and EF estimations using a 1/3 sampling intensity differed significantly from manual delineations (P < .05).
• No significant differences were found between reference values and LV parameters estimated using the entire slice set or a 1/2 sampling intensity (P > .05).
• High correlation (r(2) = 0.80-0.93) and acceptable limits of agreement were observed between stereological methods (1/2 sampling) and the reference method, with reduced measurement time.

Conclusions:

• Stereological analysis using a 1/2 systematic sampling intensity of MR slices provides an efficient and rapid method for assessing LV volumes, function, and mass.
• This combined approach offers a clinically viable alternative for quantitative cardiac assessment.