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Projection reconstruction balanced fast field echo for interactive real‐time cardiac imaging
Author(s) -
Schaeffter Tobias,
Weiss Steffen,
Eggers Holger,
Rasche Volker
Publication year - 2001
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1322
Subject(s) - undersampling , computer science , artificial intelligence , precession , projection (relational algebra) , computer vision , iterative reconstruction , temporal resolution , fourier transform , cardiac imaging , contrast (vision) , algorithm , mathematics , physics , optics , medicine , mathematical analysis , astronomy , cardiology
A balanced fast field echo (FFE) sequence (also referred to as true fast imaging with steady precession (true FISP)), based on projection reconstruction (PR) is evaluated in combination with real‐time reconstruction and interactive scanning capabilities for cardiac function studies. Cardiac image sequences obtained with the balanced PR‐FFE method are compared with images obtained with a spin‐warp (2D Fourier transform (2DFT)) technique. In particular, the representation of motion artifacts in both techniques is investigated. Balanced PR‐FFE provides a similar contrast to spin‐warp‐related techniques, but is less sensitive to motion artifacts. The use of angular undersampling within balanced PR‐FFE is examined as a means to increase temporal resolution while causing only minor artifacts. Furthermore, a modification of the profile order allows the reconstruction of PR images at different spatial and temporal resolution levels from the same data. This study shows that balanced PR‐FFE is a robust tool for cardiac function studies. Magn Reson Med 46:1238–1241, 2001. © 2001 Wiley‐Liss, Inc.