Automatic extraction of three-dimensional thoracic aorta geometric model from phase contrast MRI for morphometric and hemodynamic characterization

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
Paola VolonghiGiovanna Rizzo

Abstract

To propose and assess a new method that automatically extracts a three-dimensional (3D) geometric model of the thoracic aorta (TA) from 3D cine phase contrast MRI (PCMRI) acquisitions. The proposed method is composed of two steps: segmentation of the TA and creation of the 3D geometric model. The segmentation algorithm, based on Level Set, was set and applied to healthy subjects acquired in three different modalities (with and without SENSE reduction factors). Accuracy was evaluated using standard quality indices. The 3D model is characterized by the vessel surface mesh and its centerline; the comparison of models obtained from the three different datasets was also carried out in terms of radius of curvature (RC) and average tortuosity (AT). In all datasets, the segmentation quality indices confirmed very good agreement between manual and automatic contours (average symmetric distance < 1.44 mm, DICE Similarity Coefficient > 0.88). The 3D models extracted from the three datasets were found to be comparable, with differences of less than 10% for RC and 11% for AT. Our method was found effective on PCMRI data to provide a 3D geometric model of the TA, to support morphometric and hemodynamic characterization of the aorta.

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Citations

May 30, 2017·Computer Methods in Biomechanics and Biomedical Engineering·Silvia BozziGiuseppe Passoni
Nov 3, 2017·Annals of Biomedical Engineering·Zhenglun Alan WeiAjit Yoganathan
Dec 22, 2016·BMC Medical Imaging·Xingce WangMingquan Zhou
Jan 12, 2021·Journal of Magnetic Resonance Imaging : JMRI·Thomas DietenbeckNadjia Kachenoura

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