English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Model-based reconstruction for real-time phase-contrast flow MRI: Improved spatiotemporal accuracy.

Tan, Z., Roeloffs, V. B., Voit, D., Joseph, A. A., Untenberger, M., Merboldt, K. D., et al. (2017). Model-based reconstruction for real-time phase-contrast flow MRI: Improved spatiotemporal accuracy. Magnetic Resonance in Medicine, 77(3), 1082-1093. doi:10.1002/mrm.26192.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-8446-A Version Permalink: http://hdl.handle.net/21.11116/0000-0001-51DE-A
Genre: Journal Article

Files

show Files
hide Files
:
2351084.pdf (Publisher version), 2MB
 
File Permalink:
-
Name:
2351084.pdf
Description:
-
Visibility:
Restricted (Max Planck Institute for Biophysical Chemistry (Karl Friedrich Bonhoeffer Institute), Göttingen; )
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-
:
2351084_Suppl_1.avi (Supplementary material), 761KB
Name:
2351084_Suppl_1.avi
Description:
-
Visibility:
Public
MIME-Type / Checksum:
video/x-msvideo / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-
:
2351084_Suppl_2.avi (Supplementary material), 490KB
Name:
2351084_Suppl_2.avi
Description:
-
Visibility:
Public
MIME-Type / Checksum:
video/x-msvideo / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-
:
2351084_Suppl_3.avi (Supplementary material), 893KB
Name:
2351084_Suppl_3.avi
Description:
-
Visibility:
Public
MIME-Type / Checksum:
video/x-msvideo / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-
:
2351084_Suppl_4.avi (Supplementary material), 443KB
Name:
2351084_Suppl_4.avi
Description:
-
Visibility:
Public
MIME-Type / Checksum:
video/x-msvideo / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-
:
2351084_Suppl_5.avi (Supplementary material), 2MB
Name:
2351084_Suppl_5.avi
Description:
-
Visibility:
Public
MIME-Type / Checksum:
video/x-msvideo / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-
:
2351084_Suppl_6.avi (Supplementary material), 525KB
Name:
2351084_Suppl_6.avi
Description:
-
Visibility:
Public
MIME-Type / Checksum:
video/x-msvideo / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Tan, Z.1, Author              
Roeloffs, V. B.1, Author              
Voit, D.1, Author              
Joseph, A. A.1, Author              
Untenberger, M.1, Author              
Merboldt, K. D.1, Author              
Frahm, J.1, Author              
Affiliations:
1Biomedical NMR Research GmbH, MPI for Biophysical Chemistry, Max Planck Society, ou_578634              

Content

show
hide
Free keywords: nonlinear inverse reconstruction; model-based reconstruction; cardiovascular blood flow; phase-contrast flow MRI; radial MRI; real-time MRI
 Abstract: PURPOSE: To develop a model-based reconstruction technique for real-time phase-contrast flow MRI with improved spatiotemporal accuracy in comparison to methods using phase differences of two separately reconstructed images with differential flow encodings. METHODS: The proposed method jointly computes a common image, a phase-contrast map, and a set of coil sensitivities from every pair of flow-compensated and flow-encoded datasets obtained by highly undersampled radial FLASH. Real-time acquisitions with five and seven radial spokes per image resulted in 25.6 and 35.7 ms measuring time per phase-contrast map, respectively. The signal model for phase-contrast flow MRI requires the solution of a nonlinear inverse problem, which is accomplished by an iteratively regularized Gauss-Newton method. Aspects of regularization and scaling are discussed. The model-based reconstruction was validated for a numerical and experimental flow phantom and applied to real-time phase-contrast MRI of the human aorta for 10 healthy subjects and 2 patients. RESULTS: Under all conditions, and compared with a previously developed real-time flow MRI method, the proposed method yields quantitatively accurate phase-contrast maps (i.e., flow velocities) with improved spatial acuity, reduced phase noise and reduced streaking artifacts. CONCLUSION: This novel model-based reconstruction technique may become a new tool for clinical flow MRI in real time.

Details

show
hide
Language(s): eng - English
 Dates: 2016-03-072017-03
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1002/mrm.26192
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Magnetic Resonance in Medicine
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 77 (3) Sequence Number: - Start / End Page: 1082 - 1093 Identifier: -