Synthesized MR images: comparison with acquired images.
Published
Journal Article
Synthesized and directly acquired spin-echo images were compared in order to assess the validity of magnetic resonance (MR) image synthesis as a method enabling retrospective formation of images by interactive manipulation of scan parameters. Synthetic images subjectively compared favorably in both accuracy and precision with acquired images when formed for the same values of echo (TE) and repetition times (TR) and for interpolated and extrapolated values of both TE and TR. Plots of synthetic and acquired signals within the same pixel sectors quantitatively showed comparable values for several regions of interest in the brain. Percent error and noise-normalized differences between acquired and synthetic images were tested as a quantitative measure of accuracy. Percent error was consistently less than 5% for brain parenchyma, and synthetic signals were accurate to within four times the noise level at acquisition. The apparent signal-to-noise ratio of synthetic images was comparable, superior, or inferior to similar acquired images, depending on the values of TE and TR. Total acquisition time required for synthetic formation of images for arbitrary values of TE and TR was equivalent to that of a single direct acquisition with a TR of 2,500 msec.
Full Text
Cited Authors
- Bobman, SA; Riederer, SJ; Lee, JN; Suddarth, SA; Wang, HZ; MacFall, JR
Published Date
- June 1, 1985
Published In
Volume / Issue
- 155 / 3
Start / End Page
- 731 - 738
PubMed ID
- 4001377
Pubmed Central ID
- 4001377
Electronic International Standard Serial Number (EISSN)
- 1527-1315
International Standard Serial Number (ISSN)
- 0033-8419
Digital Object Identifier (DOI)
- 10.1148/radiology.155.3.4001377
Language
- eng