LIVER IMAGING AT 1.5 TESLA - PULSE SEQUENCE OPTIMIZATION BASED ON IMPROVED MEASUREMENT OF TISSUE RELAXATION-TIMES

被引：22

作者：

VANLOM, KJ ^{[1
]}

BROWN, JJ ^{[1
]}

PERMAN, WH ^{[1
]}

SANDSTROM, JC ^{[1
]}

LEE, JKT ^{[1
]}

机构：

[1] WASHINGTON UNIV,SCH MED,EDWARD MALLINCKRODT INST RADIOL,510 S KINGSHIGHWAY,ST LOUIS,MO 63110

来源：

MAGNETIC RESONANCE IMAGING | 1991年 / 9卷 / 02期

关键词：

LIVER; MR STUDIES; MAGNETIC RESONANCE (MR) PULSE SEQUENCES; LIVER NEOPLASMS;

D O I：

10.1016/0730-725X(91)90006-8

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

In order to predict the most sensitive MR imaging sequence for detecting liver metastases at 1.5 T, in vivo measurements of T1 and T2 relaxation times and proton density were obtained using multipoint techniques. Based on these measurements, two-dimensional contrast contour plots were constructed demonstrating signal intensity contrast between hepatic lesions and surrounding liver parenchyma for different pulse sequences and pulse timing parameters. The data predict that inversion recovery spin echo (IRSE) imaging should yield the greatest contrast between liver metastases and liver parenchyma at 1.5 T, followed by short tau inversion recovery (STIR) and spin-echo (SE) pulse sequences. T2-weighted SE images provided greater liver/lesion contrast than T1-weighted SE pulse sequences. Calculated T1, T2, and proton density values of the spleen were similar to those of hepatic metastatic lesions, indicating that the signal intensity of the spleen may be used as an internal standard to predict the signal intensity of hepatic metastases on T1- and T2-weighted images at 1.5 T.

引用

页码：165 / 171

页数：7

共 33 条

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