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Related Experiment Videos

Two-dimensional versus three-dimensional CT scan for aortic measurement.

Ellen D Dillavou1, David G Buck, Satish C Muluk

  • 1Divisions of Vascular Surgery, University of Pittsburgh Medical Center, Pittsburgh Pennsylvania 15213, USA.

Journal of Endovascular Therapy : an Official Journal of the International Society of Endovascular Specialists
|August 23, 2003
PubMed
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Three-dimensional (3D) CT reconstructions offer similar aortic diameter measurements to standard 2D CT scans. Minor axis measurements from 2D computed tomography (CT) scans are reliable for most clinical uses.

Area of Science:

  • Radiology
  • Medical Imaging
  • Cardiovascular Imaging

Background:

  • Accurate measurement of aortic diameter is crucial for diagnosing and managing aortic aneurysms.
  • Computed tomography (CT) is a primary imaging modality for aortic assessment.
  • Three-dimensional (3D) reconstructions offer potential for improved visualization and measurement accuracy compared to traditional 2D axial views.

Purpose of the Study:

  • To evaluate if 3D CT reconstructions improve aortic diameter measurement accuracy compared to standard 2D axial CT.
  • To compare measurements of the aortic neck, sac, and iliac arteries using both 2D and 3D CT techniques.

Main Methods:

  • Two blinded observers measured aortic diameters on 40 2D CT scans and corresponding 3D reconstructions from 31 patients.
  • Measurements included minor and major axes for the aortic neck, sac, and iliac arteries.

Related Experiment Videos

  • Comparison used intraclass correlation coefficients (ICC) and Bland-Altman analysis.

    • Main Results:

    • High correlation was found between 2D minor axis measurements and 3D reconstructions for the aortic neck (ICC=0.9282) and sac (ICC=0.8956).
    • Average variation between 3D and 2D minor axis measurements was low (0.51 mm).
    • Interobserver agreement was highest for sac measurements in 3D (ICC=0.9518).

    Conclusions:

    • Standard 2D CT minor axis measurements provide comparable accuracy to 3D reconstructions for most clinical applications.
    • 3D reconstructions may not offer significant advantages over 2D CT for routine aortic diameter measurements.