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MR of focal liver lesions: Comparison of breath‐hold and non‐breath‐hold hybrid rare and conventional spin‐echo T2‐weighted pulse sequences
Author(s) -
Carpenter Kenneth D.,
Macaulay Shane E.,
Schulte Scott J.,
Obregon Richard G.,
Nelson Rendon C.,
Simon Howard E.,
Schmiedl Udo P.
Publication year - 1996
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1880060407
Subject(s) - medicine , sequence (biology) , pulse sequence , lesion , spin echo , nuclear medicine , t2 relaxation , radiology , nuclear magnetic resonance , magnetic resonance imaging , pathology , chemistry , physics , biochemistry
To compare liver lesion detection rates, tissue signal and noise data, and qualitative parameters for breathhold (BH) and non‐breath‐hold (NBH) hybrid rapid acquisition with relaxation enhancement (RARE) and conventional spin‐echo (CSE) T2‐weighted (CSE‐T2) MR sequences, 20 patients were imaged using all three sequences. Lesion detection rates were 73.5% for the CSE‐T2 sequence and 81.1% and 88.6% for the BH‐RARE and NBH‐RARE sequences, respectively ( P = .027). Mean lesion‐to‐liver signal‐difference‐to‐noise ratio for the NBH‐RARE sequence was 14.0 ± 11.5, significantly greater than 9.8 ± 7.8 obtained for the BH‐RARE sequence ( P = .050) and 9.0 ± 6.2 obtained for the CSE‐T2 sequence ( P = .015). The NBH‐RARE sequence demonstrated fewer artifacts and greater overall image quality compared to the CSE‐T2 sequence. The NBH‐RARE sequence is a useful alternative to the CSE‐T2 sequence providing a higher mean lesion‐to‐liver signal‐difference‐to‐noise ratio and lesion detection rate and better overall image quality.