TY - JOUR
T1 - Detection of hepatic metastases with MR imaging
T2 - Spin-echo vs phase-contrast pulse sequences at 0.6 T
AU - Rummeny, E.
AU - Saini, S.
AU - Stark, D. D.
AU - Weissleder, R.
AU - Compton, C. C.
AU - Ferrucci, J. T.
PY - 1989
Y1 - 1989
N2 - The purpose of this study was to compare the sensitivity of T1-weighted and T2-weighted spin-echo (SE) pulse sequences with T2-weighted phase-contrast (PC) imaging techniques for the detection of hepatic metastases. Pulse-sequence performance was evaluated in 52 consecutive patients with 88 hepatic metastases who underwent MR imaging at 0.6 T. Lesion-liver contrast-to-noise ratios (CNR) on SE 260/14 (-12.4 ± 6.7) and PC 2350/60 (+10.8 ± 4.2) images were significantly (p < .05) greater than on SE 2350/60 (+7.8 ± 3.9), SE 2350/120 (+8.1 ± 4.8), SE 2350/180 (+7.9 ± 4.5), and PC 2350/30 (+4.6 ± 2.9) images. Sensitivity for detection of 88 individual metastases was comparable on SE 260/14 (78 of 88 patients) and PC 2350/60 (81 of 88 patients) images and was significantly (p < .05) greater than on in-phase T2-weighted SE images (TE = 60, 70 of 88 patients; TE = 120, 69 of 88 patients; TE = 180, 65 of 88 patients). Histologic analysis of tumor-free liver showed fatty change in 11 of 13 specimens available for pathologic evaluation. In all 11 of those patients, PC images increased tumor-liver contrast in comparison with the in-phase SE images. This analysis suggests that for detection of hepatic metastases at midfield strengths, the T1-weighted, short TR/short TE (SE 260/14) and the T2-weighted, phase-contrast (PC 2350/60) pulse sequences offer comparable performance.
AB - The purpose of this study was to compare the sensitivity of T1-weighted and T2-weighted spin-echo (SE) pulse sequences with T2-weighted phase-contrast (PC) imaging techniques for the detection of hepatic metastases. Pulse-sequence performance was evaluated in 52 consecutive patients with 88 hepatic metastases who underwent MR imaging at 0.6 T. Lesion-liver contrast-to-noise ratios (CNR) on SE 260/14 (-12.4 ± 6.7) and PC 2350/60 (+10.8 ± 4.2) images were significantly (p < .05) greater than on SE 2350/60 (+7.8 ± 3.9), SE 2350/120 (+8.1 ± 4.8), SE 2350/180 (+7.9 ± 4.5), and PC 2350/30 (+4.6 ± 2.9) images. Sensitivity for detection of 88 individual metastases was comparable on SE 260/14 (78 of 88 patients) and PC 2350/60 (81 of 88 patients) images and was significantly (p < .05) greater than on in-phase T2-weighted SE images (TE = 60, 70 of 88 patients; TE = 120, 69 of 88 patients; TE = 180, 65 of 88 patients). Histologic analysis of tumor-free liver showed fatty change in 11 of 13 specimens available for pathologic evaluation. In all 11 of those patients, PC images increased tumor-liver contrast in comparison with the in-phase SE images. This analysis suggests that for detection of hepatic metastases at midfield strengths, the T1-weighted, short TR/short TE (SE 260/14) and the T2-weighted, phase-contrast (PC 2350/60) pulse sequences offer comparable performance.
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U2 - 10.2214/ajr.153.6.1207
DO - 10.2214/ajr.153.6.1207
M3 - Article
C2 - 2683677
AN - SCOPUS:0024358051
SN - 0361-803X
VL - 153
SP - 1207
EP - 1211
JO - American Journal of Roentgenology
JF - American Journal of Roentgenology
IS - 6
ER -