ADVANCES IN CARDIAC APPLICATIONS OF SUBSECOND FLASH MRI

被引：29

作者：

CHIEN, D ^{[1
]}

MERBOLDT, KD ^{[1
]}

HANICKE, W ^{[1
]}

BRUHN, H ^{[1
]}

GYNGELL, ML ^{[1
]}

FRAHM, J ^{[1
]}

机构：

[1] MAX PLANCK INST BIOPHYS CHEM,POSTFACH 2841,W-3400 GOTTINGEN,GERMANY

来源：

MAGNETIC RESONANCE IMAGING | 1990年 / 8卷 / 06期

关键词：

Heart; anatomy; MR studies; ventricles; Magnetic resonance; physics; pulse sequence; technology; Myocardium;

D O I：

10.1016/0730-725X(90)90022-T

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：

Flow-suppressed, subsecond FLASH MR images of the normal human heart have been obtained from single cardiac cycles using a 2.0-T whole-body MRI MRS system (Siemens Magnetom) equipped with conventional 10 mT m-1 gradients. The present results demonstrate further technical improvements as compared to a previous report on the same subject (Magn. Reson. Med. 13:150-157; 1990). Measuring times of 139 msec and 209 msec were achieved by reducing the repetition time to TR = 4.36 msec (TE = 2.8 msec) and the spatial resolution to 32 × 128 or 48 × 128 measured data points, respectively. The flip angle was optimized to 12°. Spatial pre-saturation of 60 mm thick sections adjacent to the imaging plane resulted in a suppression of the blood signal and a clear delineation of the myocardium. Oblique rotation of the imaging slice provides convenient access to the anatomical long axis and short axis views of the heart. EKG-triggered images from separate heartbeats but at different cardiac phases demonstrate that the effective time resolution is considerably less than the actual imaging time. © 1990.

引用

页码：829 / 836

页数：8

共 17 条

[1]

Mansfield, Multi-planar image formation using NMR spin echoes, J. Phys. C.: Solid State Phys., 10, pp. L55-L58, (1977)

[2]

Mansfield, Pykett, Biological and medical imaging by NMR, J. Magn. Reson., 29, pp. 355-373, (1978)

[3]

Howseman, Stehling, Chapman, Coxon, Turner, Ordidge, Cawley, Glover, Mansfield, Coupland, Improvements in snap-shot NMR imaging, Br. J. Radiol., 61, pp. 822-828, (1988)

[4]

Stehling, Howseman, Ordidge, Chapman, Turner, Coxon, Glover, Mansfield, Coupland, Whole-body echo-lanar imaging at 0.5T, Radiology, 170, pp. 257-263, (1989)

[5]

Rzedzian, Pykett, Instant images of the human heart using a new, whole-body MR imaging system, Am. J. Roetgen., 149, pp. 245-250, (1987)

[6]

Pykett, Rzedzian, Instant images of the body by magnetic resonance, Magn. Reson. Med., 5, pp. 563-571, (1987)

[7]

Coxon, Mansifeld, EPI spatial distortion in nontransverse planes, 8th Annual Meeting, Society of Magnetic Resonance in Medicine, (1989)

[8]

Frahm, Merboldt, Bruhn, Gyngell, Hanicke, Chien, 0.3-second FLASH MRI of the human heart, Magn. Reson. Med., 13, pp. 150-157, (1990)

[9]

Haase, Frahm, Matthaei, Hanicke, Merboldt, FLASH imaging. Rapid NMR imaging using low flip-angle pulses, J. Magn. Reson., 67, pp. 258-266, (1986)

[10]

Frahm, Haase, Matthaei, Rapid NMR imaging of dynamic processes using the FLASH technique, Magn. Reson. Med., 3, pp. 321-327, (1986)

← 1 2 →