PELVIC IMAGING WITH PHASED-ARRAY COILS - QUANTITATIVE ASSESSMENT OF SIGNAL-TO-NOISE RATIO IMPROVEMENT

被引：45

作者：

HAYES, CE

DIETZ, MJ

KING, BF

EHMAN, RL

机构：

[1] Applied Science Laboratory, GE Medical Systems, Waukesha, Wisconsin

[2] Department of Radiology, Mayo Clinic, Rochester, Minnesota

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1992年 / 2卷 / 03期

关键词：

COIL ARRAYS; PELVIC ORGANS; MR; PELVIS; PHANTOM; TECHNOLOGY;

D O I：

10.1002/jmri.1880020312

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：

The signal-to-noise ratios (S/Ns) of two different pelvic magnetic resonance (MR) imaging phased arrays were compared with that of the body coil. Each array consisted of two coils placed anteriorly and two posteriorly, oriented transversely in one array and longitudinally in the other. SIN measurements were obtained in an adjustable water-filled phantom that simulated the shape and radio-frequency loading effects of various-size patients. Depending on the simulated anterior-posterior thickness of the patient, the SIN produced by the longitudinal army ranged from 2.3 to 3.1 times higher than that of the body coil. The S/N of the transverse array was 3.1 to 3.4 times higher. The increased coil sensitivity permits imaging with shorter acquisition times, smaller fields of view. finer resolution, and/or thinner sections. Two examples in patients demonstrate the enhanced imaging capability of the phased arrays.

引用

页码：321 / 326

页数：6

共 15 条

[1]

Hyde JS, Jesmanowicz A, Froncesz W, Kneeland JB, Grist TM, Campagna NF, Parallel image acquisition from noninteracting local coils, J Magn Reson, 70, pp. 512-517, (1986)

[2]

Roemer PB, Edelstein WA, Souza SP, Hayes CE, Mueller OM, Simultaneous multiple surface coil imaging (abstr), Book of abstracts: Society of Magnetic Resonance in Medicine 1988, (1988)

[3]

Roemer PB, Edelstein WA, Hayes CE, Souza SP, Mueller OM, The NMR phased array, Magn Reson Med, 16, pp. 192-225, (1990)

[4]

Hayes CE, Hattes N, Roemer PB, Volume imaging with MR phased arrays, Magn Reson Med, 18, pp. 309-319, (1991)

[5]

Hayes CE, King BF, Design of a longitudinal MR imaging multiple‐surface‐coil array straddling the lower central pelvic region (abstr), Radiology, 177, P, (1990)

[6]

Hoult DI, Lauterbur PC, The sensitivity of the zeugmatographic experiment involving human samples, J Magn Reson, 34, pp. 425-433, (1979)

[7]

Glover GH, Hayes CE, Pelc NJ, Et al., Comparison of linear and circular polarization for magnetic resonance imaging, J Magn Reson, 64, pp. 255-270, (1985)

[8]

Hayes CE, Axel L, Noise performance of surface coils for magnetic resonance imaging at 1.5 T, Med Phys, 12, pp. 604-607, (1985)

[9]

Hoult DI, Richards RE, The signal‐to‐noise ratio of the nuclear magnetic resonance experiment, J Magn Reson, 24, pp. 71-85, (1976)

[10]

Roeschman P, Radio‐frequency penetration and absorption in the human body: limitations to high‐field wholebody nuclear magnetic resonance imaging, Med Phys, 14, pp. 922-931, (1987)

← 1 2 →