𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Combined MR imaging and CFD simulation of flow in the human descending aorta

✍ Scribed by Nigel B. Wood; Simon J. Weston; Philip J. Kilner; A. David Gosman; David N. Firmin

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
511 KB
Volume
13
Category
Article
ISSN
1053-1807

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A combined MR and computational fluid dynamics (CFD) study is made of flow in the upper descending thoracic aorta. The aim was to investigate further the potential of CFD simulations linked to in vivo MRI scans. The three‐dimensional (3D) geometrical images of the aorta and the 3D time‐resolved velocity images at the entry to the domain studied were used as boundary conditions for the CFD simulations of the flow. Despite some measurement uncertainties, comparisons between simulated and measured flow structures at the exit from the domain demonstrated encouraging levels of agreement. Moreover, the CFD simulation allowed the flow structure throughout the domain to be examined in more detail, in particular the flow separation region in the distal aortic arch and its influence on the downstream flow during late systole. Additional information such as relative pressure and wall shear stress, which could not be measured via MRI, were also extracted from the simulation. The results have encouraged further applications of the methods described. J. Magn. Reson. Imaging 2001;13:699–713. © 2001 Wiley‐Liss, Inc.

📜 SIMILAR VOLUMES

Flow pattern analysis in the abdominal a
Flow pattern analysis in the abdominal aorta with velocity-encoded cine MR imaging
✍ Gerhard H. Mostbeck; Matthias C. Dulce; Gary R. Caputo; Evelyn Proctor; Charles 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 952 KB

## Abstract The sites of deposition of atherosclerotic plaque on the aortic wall are considered to be influenced by secondary and retrograde flow patterns that cause regions of altered shear stress. To detect secondary flow patterns and areas of retrograde flow in the abdominal aorta, velocity‐enco

Fetal cardiac arrhythmias and their effe
Fetal cardiac arrhythmias and their effect on volume blood flow in descending aorta of human fetus
✍ H. M. Tonge; J. W. Wladimiroff; M. J. Noordam; P. A. Stewart 📂 Article 📅 1986 🏛 John Wiley and Sons 🌐 English ⚖ 455 KB

Using a two-dimensional linear array real-time and pulsed Doppler ultrasound system, volume blood flow measurements were made in 86 normal pregnancies, seven cases of fetal bradycardia, and seven cases of fetal tachycardia at the lower thoracic level of the fetal descending aorta. During fetal cardi

Reverse flow in the human fetal descendi
Reverse flow in the human fetal descending aorta as a sign of severe fetal asphyxia preceding intrauterine death
✍ Miklós Illyés; István Gáti 📂 Article 📅 1988 🏛 John Wiley and Sons 🌐 English ⚖ 606 KB

Flow velocity waveforms (FVW) in the descending part of the human fetal aorta were monitored in 35 cases of severe intrauterine growth retardation (IUGR) showing pathological intrauterine circulation (end-diastolic block). In 5 of the 35 fetuses, reversed aortic flow was observable during diastole a

Automatic vessel wall contour detection
Automatic vessel wall contour detection and quantification of wall thickness in in-vivo MR images of the human aorta
✍ Isabel M. Adame; Rob J. van der Geest; David A. Bluemke; João A.C. Lima; Johan H 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 706 KB

## Abstract ## Purpose To develop an automated technique to trace the contours of the lumen and outer boundary of the aortic wall, and measure aortic wall thickness in axial MR images. ## Materials and Methods The algorithm uses prior knowledge of vessel wall morphology. A geometrical model (ell