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Measuring the aortic root with coronary computed tomography angiography: Concordance with transthoracic

G Burcet1, A Aubanell2, A Roque3

  • 1Sección de Imagen Cardiotorácica, Servicio de Radiodiagnóstico, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Spain.

Radiologia
|July 4, 2026
PubMed

Insights

Anteroposterior diameter (APD) measured by cardiac computed tomography angiography (CCTA) closely matches transthoracic echocardiography (TTE) measurements for aortic root (AoR) dilatation. This finding suggests APD may become a standard for comparing imaging techniques.

Area of Science:

  • Cardiovascular Imaging
  • Radiology
  • Medical Diagnostics

Background:

  • Aortic root (AoR) dilatation requires monitoring via serial imaging for treatment decisions.
  • Discrepancies exist between transthoracic echocardiography (TTE) and cross-sectional imaging for AoR measurements.

Purpose of the Study:

  • To identify which aortic root (AoR) measurement using cardiac computed tomography angiography (CCTA) best correlates with standard TTE measurements.
  • To evaluate CCTA measurements in patients with tricuspid aortic valves.

Main Methods:

  • Retrospective analysis of 110 patients with both CCTA and TTE within six months.
  • Measured AoR parameters on CCTA: cusp-to-commissure, cusp-to-cusp, area, area-derived diameter (ADD), and anteroposterior diameter (APD).
  • Compared CCTA measurements against TTE standards.

Main Results:

  • CCTA measurements showed excellent correlation with TTE (p < 0.001).
  • Highest agreement was observed for ADD and APD (p < 0.001).
  • APD measurements by CCTA did not significantly differ from TTE (overall p = 0.451).

Conclusions:

  • Anteroposterior diameter (APD) measured by CCTA is equivalent to TTE measurements.
  • APD is easy to perform and highly reproducible.
  • APD may serve as a reference standard for comparing TTE and CCTA AoR measurements.
Abstract

Keywords:
Angio-TC cardíacoAnteroposterior diameterAortic rootCardiac CT angiographyDilatation measurementDistancia anteroposteriorMedición dilataciónRaíz aórtica

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