PHASE-CONTRAST MR ANGIOGRAPHY WITH REDUCED ACQUISITION TIME - NEW CONCEPTS IN SEQUENCE DESIGN

被引：53

作者：

HAUSMANN, R

LEWIN, JS

LAUB, G

机构：

[1] Siemens Medical Engineering Group, Erlangen, D-8520

[2] Department of Radiology, University Hospitals of Cleveland, Case Western Reserve University, Cleveland

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1991年 / 1卷 / 04期

关键词：

BLOOD VESSELS; MR STUDIES; IMAGE DISPLAY; IMAGE PROCESSING; PHASE-CONTRAST IMAGING; PHYSICS; PULSE SEQUENCES; 3-DIMENSIONAL IMAGING; VASCULAR STUDIES;

D O I：

10.1002/jmri.1880010405

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 new acquisition scheme for three-dimensional (3D) phase-contrast MR angiography reduces by 33% the measurement time for a data set sensitive to flow in all three orthogonal directions. Background suppression is achieved by acquiring a flow-compensated data set and three data sets flow encoded in the three orthogonal directions, with subsequent complex subtraction. The data are acquired in an interleaved fashion, eliminating misregistration artifacts due to patient motion between measurements sensitive to different flow directions. A standard maximum intensity projection algorithm is applied to the combined 3D data set to obtain angiographic projections sensitive to all three orthogonal flow directions. The theory and implementation of the method are described and examples of its application to the intracranial and abdominal circulation are provided.

引用

页码：415 / 422

页数：8

共 14 条

[1]

Axel L, Blood flow effects in magnetic resonance imaging, AJR, 143, pp. 1157-1166, (1984)

[2]

Ruggieri PM, Laub GA, Masaryk TJ, Modic MT, Intracranial circulation: pulse‐sequence considerations in threedimensional (volume) MR angiography, Radiology, 171, pp. 785-791, (1989)

[3]

Masaryk TJ, Modic MT, Ross JS, Et al., Intracranial circulation: preliminary clinical results with three‐dimensional (volume) MR angiography, Radiology, 171, pp. 793-799, (1989)

[4]

Carr HY, Purcell EM, Effects of diffusion on free precession in NMR experiments, Phys Rev, 94, pp. 630-638, (1954)

[5]

Moran PR, A flow velocity zeugmatographic interlace for NMR imaging in humans, Magn Reson Imaging, 1, pp. 197-203, (1982)

[6]

Dumoulin CL, Hart HR, Magnetic resonance angiography, Radiology, 161, pp. 717-720, (1986)

[7]

Dumoulin CL, Souza SP, Walker MF, Wagle W, Three‐dimensional phase contrast angiography, Magn Reson Med, 9, pp. 139-149, (1989)

[8]

Hausmann R, Lewin JL, Laub G, Reduction of scan time with a modified phase‐contrast acquisition scheme (abstr), Book of abstracts: Society of Magnetic Resonance in Medicine 1990, (1990)

[9]

Pelc NJ, Bernstein MA, Shimakawa A, Glover GH, Encoding strategies for three‐direction phase‐contrast MR imaging of flow, JMRI, 1, pp. 405-413, (1991)

[10]

Axel L, Morton D, A method for imaging blood vessels by phase compensated/uncompensated difference images, J Comput Assist Tomogr, 11, pp. 31-34, (1987)

← 1 2 →