English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Real-time phase-contrast MRI of cardiovascular blood flow using undersampled radial fast low-angle shot and nonlinear inverse reconstruction.

Joseph, A. A., Merboldt, K. D., Voit, D., Zhang, S., Uecker, M., Lotz, J., et al. (2012). Real-time phase-contrast MRI of cardiovascular blood flow using undersampled radial fast low-angle shot and nonlinear inverse reconstruction. NMR in Biomedicine, 25(7), 917-924. doi:10.1002/nbm.1812.

Item is

Files

show Files
hide Files
:
1479547.pdf (Publisher version), 441KB
Name:
1479547.pdf
Description:
-
OA-Status:
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-
:
1479547_suppl_movie1.avi (Supplementary material), 13MB
Name:
1479547_suppl_movie1.avi
Description:
-
OA-Status:
Visibility:
Public
MIME-Type / Checksum:
video/x-msvideo / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-
:
1479547_suppl_movie2.mpg (Supplementary material), 15MB
Name:
1479547_suppl_movie2.mpg
Description:
-
OA-Status:
Visibility:
Public
MIME-Type / Checksum:
video/mpeg / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show
hide
Description:
-
OA-Status:

Creators

show
hide
 Creators:
Joseph, A. A.1, Author           
Merboldt, K. D.1, Author           
Voit, D.1, Author           
Zhang, S.1, Author           
Uecker, M.1, Author           
Lotz, J., Author
Frahm, J.1, Author           
Affiliations:
1Biomedical NMR Research GmbH, MPI for biophysical chemistry, Max Planck Society, ou_578634              

Content

show
hide
Free keywords: Cardiovascular MRI; flow imaging; heart function; nonlinear inverse reconstruction; phase-contrast imaging; real-time imaging
 Abstract: Velocity-encoded phase-contrast MRI of cardiovascular blood flow commonly relies on electrocardiogram-synchronized cine acquisitions of multiple heartbeats to quantitatively determine the flow of an averaged cardiac cycle. Here, we present a new method for real-time phase-contrast MRI that combines flow-encoding gradients with highly undersampled radial fast low-angle shot acquisitions and phase-sensitive image reconstructions by regularized nonlinear inversion. Apart from calibration studies using steady and pulsatile flow, preliminary in vivo applications focused on through-plane flow in the ascending aorta of healthy subjects. With bipolar velocity-encoding gradients of alternating polarity that overlap the slice-refocusing gradient, the method yields flow-encoded images with an in-plane resolution of 1.8 mm, section thickness of 6 mm and measuring time at 3 T of 24 ms (TR/TE = 3.44/2.76 ms; flip angle, 10º; seven radial spokes per image). Accordingly, phase-contrast maps and corresponding velocity profiles achieve a temporal resolution of 48 ms. The evaluated peak velocities, stroke volumes, flow rates and respective variances over at least 20 consecutive heartbeats are in general agreement with literature data.

Details

show
hide
Language(s): eng - English
 Dates: 2011-12-192012-07
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/nbm.1812
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: NMR in Biomedicine
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 25 (7) Sequence Number: - Start / End Page: 917 - 924 Identifier: ISSN: 0952-3480
CoNE: https://pure.mpg.de/cone/journals/resource/954925574973