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  4. Comparison of T2 Quantification Strategies in the Abdominal-Pelvic Region for Clinical Use
 
research article

Comparison of T2 Quantification Strategies in the Abdominal-Pelvic Region for Clinical Use

Draveny, Robin
•
Ambarki, Khalid
•
Han, Fei
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June 1, 2022
Investigative Radiology

Objectives The aim of the study was to compare different magnetic resonance imaging (MRI) acquisition strategies appropriate for T2 quantification in the abdominal-pelvic area. The different techniques targeted in the study were chosen according to 2 main considerations: performing T2 measurement in an acceptable time for clinical use and preventing/correcting respiratory motion. Materials and Methods Acquisitions were performed at 3 T. To select sequences for in vivo measurements, a phantom experiment was conducted, for which the T2 values obtained with the different techniques of interest were compared with the criterion standard (single-echo SE sequence, multiple acquisitions with varying echo time). Repeatability and temporal reproducibility studies for the different techniques were also conducted on the phantom. Finally, an in vivo study was conducted on 12 volunteers to compare the techniques that offer acceptable acquisition time for clinical use and either address or correct respiratory motion. Results For the phantom study, the DESS and T2-preparation techniques presented the lowest precision (rho(2) = 0.9504 and rho(2) = 0.9849 respectively), and showed a poor repeatability/reproducibility compared with the other techniques. The strategy relying on SE-EPI showed the best precision and accuracy (rho(2) = 0.9994 and C-b = 0.9995). GRAPPATINI exhibited a very good precision (rho(2) = 0.9984). For the technique relying on radial TSE, the precision was not as good as GRAPPATINI (rho(2) = 0.9872). The in vivo study demonstrated good respiratory motion management for all of the selected techniques. It also showed that T2 estimate ranges were different from one method to another. For GRAPPATINI and radial TSE techniques, there were significant differences between all the different types of organs of interest. Conclusions To perform T2 measurement in the abdominal-pelvic region, one should favor a technique with acceptable acquisition time for clinical use, with proper respiratory motion management, with good repeatability, reproducibility, and precision. In this study, the techniques relying respectively on SE-EPI, radial TSE, and GRAPPATINI appeared as good candidates.

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Type
research article
DOI
10.1097/RLI.0000000000000852
Web of Science ID

WOS:000790870500008

Author(s)
Draveny, Robin
Ambarki, Khalid
Han, Fei
Hilbert, Tom  
Laurent, Valerie
Morel, Olivier
Bertholdt, Charline
Beaumont, Marine
Date Issued

2022-06-01

Publisher

LIPPINCOTT WILLIAMS & WILKINS

Published in
Investigative Radiology
Volume

57

Issue

6

Start page

412

End page

421

Subjects

Radiology, Nuclear Medicine & Medical Imaging

•

mri

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quantification

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relaxation time

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transverse relaxation

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abdominal and pelvic imaging

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motion management

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clinical use

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spin-echo data

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k-space data

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relaxation-times

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transverse relaxometry

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image registration

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rapid estimation

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mouse model

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t-2

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reconstruction

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coefficient

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LTS5  
Available on Infoscience
May 23, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/188124
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