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[Quantitative cardiac computed tomography].

M Thelen, C Düber, P Wolff

    Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
    |June 1, 1985
    PubMed
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    Quantitative cardiac CT shows promise for estimating left ventricular muscle mass, correlating well with anatomical findings. However, it systematically underestimates end-diastolic volume in cardiomyopathies, suggesting limitations for this specific measurement.

    Area of Science:

    • Cardiovascular imaging
    • Medical physics
    • Diagnostic radiology

    Background:

    • Computed tomography (CT) is increasingly used for cardiac imaging.
    • Accurate measurement of cardiac structures is crucial for diagnosing and managing heart conditions.
    • Previous studies have explored the utility of CT for cardiac assessment.

    Purpose of the Study:

    • To evaluate the scope and limitations of quantitative cardiac CT.
    • To assess the accuracy of CT in estimating left ventricular muscle mass and end-diastolic volume.
    • To compare CT-derived measurements with anatomical findings and angiography.

    Main Methods:

    • Experimental studies in 19 dogs to estimate left ventricular muscle mass using volumetric methods, two-axis, two-plane measurements, and reference volume.

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  • Clinical studies in 22 patients with cardiomyopathies to estimate left ventricular end-diastolic volume using CT.
  • Comparison of CT measurements with anatomical findings (in dogs) and angiography (in patients).

    • Main Results:

    • CT demonstrated good correlation with anatomical findings for estimating left ventricular muscle mass in dogs.
    • CT systematically underestimated left ventricular end-diastolic volume in patients with cardiomyopathies when compared to angiography.
    • ECG-triggered magnetic resonance tomography showed improved visualization and potential for enhanced cardiac morphology measurements.

    Conclusions:

    • Quantitative cardiac CT is valuable for estimating left ventricular muscle mass but has limitations for end-diastolic volume assessment in cardiomyopathies.
    • Angiography remains a reference for end-diastolic volume, though CT shows systematic underestimation.
    • ECG-triggered MRI offers potential advantages for cardiac morphology measurements.