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MO‐F‐211‐04: Fast Phase Contrast MR Angiography with Simplified Skipped Phase Encoding and Edge Deghosting with Array Coil Enhancement (S‐ SPEED‐ACE)

Publication ,  Conference
Chang, Z; Xiang, Q; Yin, F
Published in: Medical Physics
January 1, 2011

Purpose: The aim of this work is to investigate the feasibility of accelerating phase contrast MR angiography by the fast imaging method of Simplified Skipped Phase Encoding and Edge Deghosting with Array Coil Enhancement (S‐SPEED‐ACE). Methods: The parallel imaging method of Skipped Phase Encoding and Edge Deghosting with Array Coil Enhancement (SPEED‐ACE) has been simplified with enhanced acceleration for imaging sparse objects and is termed S‐SPEED‐ACE. As demonstrated previously with a computer simulated study, S‐SPEED‐ACE partially samples k‐space with multiple coils in parallel and yields a deghosted image based on a least‐square‐error solution. Without differential filtering and full central k‐space sampling, S‐SPEED‐ACE uses more straightforward reconstruction and achieves further scan time reduction as compared with SPEED‐ACE. In this work, S‐SPEED‐ACE is further developed to accelerate real human 3D phase‐contrast MR angiography. The proposed method was tested with a 3D head PC‐MRA scan, which was acquired using a clinical 1.5T scanner on a healthy volunteer Results: Images are reconstructed by S‐SPEED‐ACE to achieve an undersampling factor of up to 8.3 with four receiver coils. The reconstructed images generally have comparable quality as that of the reference images reconstructed from full k‐space data. Maximum‐intensity‐projection (MIP) images generated from the reconstructed images also demonstrated to be consistent as those from the reference images. Conclusions: By taking advantage of signal sparsity naturally existing in the data, SPEED‐ACE was simplified and its efficiency was improved. In this work, the previously proposed parallel imaging method named S‐SPEED‐ACE has been further developed to accelerate a 3D head PC‐MRA scan. © 2011, American Association of Physicists in Medicine. All rights reserved.

Duke Scholars

Published In

Medical Physics

DOI

ISSN

0094-2405

Publication Date

January 1, 2011

Volume

38

Issue

6

Start / End Page

3730

Related Subject Headings

  • Nuclear Medicine & Medical Imaging
  • 5105 Medical and biological physics
  • 4003 Biomedical engineering
  • 1112 Oncology and Carcinogenesis
  • 0903 Biomedical Engineering
  • 0299 Other Physical Sciences
 

Published In

Medical Physics

DOI

ISSN

0094-2405

Publication Date

January 1, 2011

Volume

38

Issue

6

Start / End Page

3730

Related Subject Headings

  • Nuclear Medicine & Medical Imaging
  • 5105 Medical and biological physics
  • 4003 Biomedical engineering
  • 1112 Oncology and Carcinogenesis
  • 0903 Biomedical Engineering
  • 0299 Other Physical Sciences