FAST SPIN-ECHO STUDIES OF CONTRAST AND SMALL-LESION DEFINITION IN A LIVER-METASTASIS PHANTOM

被引：15

作者：

CHIEN, D ^{[1
]}

MULKERN, RV ^{[1
]}

机构：

[1] VET ADM MED CTR,DEPT RADIOL,SAN FRANCISCO,CA 94121

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1992年 / 2卷 / 04期

关键词：

LIVER NEOPLASMS; PHANTOMS; PHASE-ENCODING ORDER; PULSE SEQUENCES; RAPID IMAGING;

D O I：

10.1002/jmri.1880020419

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：

A liver-metastasis model was used to study the ability of fast spin-echo (FSE) imaging to show small lesions (1 pixel in diameter) relative to conventional spin-echo imaging. FSE images of the liver-metastasis phantom were acquired with various phase-encode reordering schemes to manipulate T2 contrast. The imaging time for multisection acquisitions was 27 seconds for FSE imaging and 6 minutes 48 seconds for conventional spin-echo imaging. Computer simulations were performed to determine how the point spread function varies with the different phase-encoding orders in FSE imaging. Contrast-to-noise ratios and signal profiles of the lesions were measured as a function of the effective TE and lesion size. Experimental results and theoretical simulations showed that T2-weighted FSE imaging provides high contrast and good edge definition even for small lesions. The results indicate that FSE imaging may become a powerful method for the early detection of liver metastases.

引用

页码：483 / 487

页数：5

共 12 条

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