SINGLE-SHOT MAGNETIC-RESONANCE-IMAGING - APPLICATIONS TO ANGIOGRAPHY

被引：4

作者：

CRAWLEY, AP ^{[1
]}

COHEN, MS ^{[1
]}

YUCEL, EK ^{[1
]}

PONCELET, B ^{[1
]}

BRADY, TJ ^{[1
]}

机构：

[1] MASSACHUSSETTS GEN HOSP,CTR NMR,BLDG 149,13TH ST,BOSTON,MA 02129

来源：

CARDIOVASCULAR AND INTERVENTIONAL RADIOLOGY | 1992年 / 15卷 / 01期

关键词：

MR ANGIOGRAPHY; INSTASCAN; ECHO PLANAR IMAGING;

D O I：

10.1007/BF02733897

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

Recently developed technologies that allow the collection of magnetic resonance imaging (MRI) in as little as 26 msec have been explored in their application to angiography. Advantages are demonstrated in scan time reduction, insensitivity to patient motion (especially in abdominal applications), flow quantification, and temporal resolution. We demonstrate that because such single-shot techniques are inherently resistant to flow dephasing during acquisition that allow for sustained high signal intensities to be achieved when images must be combined through the cardiac cycle. Such high temporal resolution scans may be utilized for the collection of time-resolved angiograms. With these techniques we demonstrate the collection of complete MR angiograms in the course of reasonable 10-25 sec breath holds. The relative simplicity of the technique, coupled with its overall short acquisition time, allows us to incorporate angiography into other imaging protocols without adding significant time burdens. Results to date are promising for further improvements in spatial resolution, without extension of scan time.

引用

页码：32 / 42

页数：11

共 33 条

[1]

Glover G., Pelc N., A rapid gated cine MRI technique, Magnetic resonance annual, pp. 299-333, (1988)

[2]

Belliveau J., Cohen M., Weisskoff R., Buchbinder B., Rosen B., Functional studies of the human brain using high-speed magnetic resonance imaging, J Neuroradiol, 1, 1, pp. 36-41, (1991)

[3]

Rosen B., Belliveau J., Chien D., Perfusion imaging by magnetic resonance, Magn Reson Q, 5, 4, pp. 226-281, (1990)

[4]

Bottomley P., Foster T., Argersinger R., Pfeiffer L., A review of normal tissue hydrogen NMR relaxation times and relaxation mechanisms from 1–100 MHz: Dependence on tissue type. NMR frequency, temperature, species, excision and age, Medical Phy, 11, (1984)

[5]

Mansfield P., Multi-planar image formation using NMR spin echoes, J Physics, 10 C, (1977)

[6]

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

[7]

Cohen M., Weisskoff R., Ultra-fast imaging, Magn Reson Imaging, 9, 1, pp. 1-37, (1991)

[8]

Twieg D., The k-trajectory formulation of the NMR imaging process with applications in analysis and synthesis of imaging methods, Med Physics, 10, pp. 610-621, (1983)

[9]

Hahn E., Spin echoes, Phys Rev, 80, 4, pp. 580-594, (1950)

[10]

Farzaneh F., Riederer S., Pelc N., Analysis of T2 limitations and off-resonance effects on spatial resolution and artifacts in echo-planar, Magn Reson Med, 14, pp. 123-139, (1990)

← 1 2 3 4 →