QUANTITATION OF STRUCTURAL DISTORTION OF THE CERVICAL NEURAL FORAMINA IN GRADIENT-ECHO MR IMAGING

被引：22

作者：

TIEN, RD ^{[1
]}

BUXTON, RB ^{[1
]}

SCHWAIGHOFER, BW ^{[1
]}

CHU, PK ^{[1
]}

机构：

[1] UNIV CALIF SAN DIEGO,MED CTR,DEPT RADIOL,225 DICKINSON ST,SAN DIEGO,CA 92103

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1991年 / 1卷 / 06期

关键词：

ARTIFACT; PHANTOMS; PULSE SEQUENCES; SPINAL CANAL; MR STUDIES; SPINE;

D O I：

10.1002/jmri.1880010611

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：

Quantitative errors (due to magnetic susceptibility artifacts) in the measurement of the cervical spinal neural foramina with fast gradient-echo (GRE) magnetic resonance imaging were assessed. Cylindric phantoms of different materials were used to demonstrate the nature of magnetic susceptibility artifacts, emphasizing the dependence of the artifact on tissue geometry. Neural foramina diameters measured on thin, sagittal GRE and spin-echo (SE) images through the neural foramina of a fresh human cervical spine specimen were then compared with direct measurements with calipers. The GRE images showed more apparent narrowing than did the SE images. The absolute distortion of seven neural foramina was rather constant (less than two pixels) on the GRE images; therefore, the relative distortion was inversely proportional to the size of the neural foramen, ranging up to 10% in the upper cervical region at a short TE. The absolute and relative distortion increased as TE increased. At a constant TE, the structural distortion did not change with different TRs or flip angles. The shortest possible TE is recommended in evaluation of the cervical spine.

引用

页码：683 / 687

页数：5

共 10 条

[1]

Tsuruda JS, Norman D, Dillon W, Et al., Three‐dimensional gradient recalled MR imaging as a screening tool for the diagnosis of cervical radiculopathy, AJNR, 10, pp. 1263-1271, (1989)

[2]

Yousem DM, Atlas SW, Goldberg HI, Grossman RI, Degenerative narrowing of the cervical spine neural foramina: evaluation with high‐resolution 3DFT gradient‐echo MR imaging, AJNR, 12, pp. 229-236, (1991)

[3]

Czervionke LF, Daniels DL, Wehrli FW, Et al., Magnetic susceptibility artifacts in gradient‐recalled echo MR imaging, AJNR, 9, pp. 1149-1155, (1988)

[4]

Tsuruda JS, Remley K, Effects of magnetic susceptibility artifacts and motion in evaluating the cervical neural foramina on 3DFT gradient‐echo MR imaging, AJNR, 12, pp. 237-241, (1991)

[5]

Luedeke KM, Roeschmann P, Tischler R, Susceptibility artifacts in NMR imaging, Magnetic Resonance Imaging, 3, pp. 329-343, (1985)

[6]

Wehrli FW, Fast‐scan magnetic resonance, Magn Reson Q, 6, pp. 165-236, (1990)

[7]

Haacke EM, Tkach JA, Parrish TB, Reduction of T2* dephasing in gradient field‐echo imaging, Radiology, 170, pp. 457-462, (1989)

[8]

Edelman RR, Johnson K, Buxton R, Et al., MR of hemorrhage: a new approach, AJNR, 7, pp. 751-756, (1986)

[9]

Young IR, Khenia S, Thomas DGT, Et al., Clinical magnetic susceptibility mapping of the brain, J Comput Assist Tomogr, 11, pp. 2-6, (1987)

[10]

Young IR, Cox IJ, Bryant DJ, Bydder GM, The benefits of increasing spatial resolution as a means of reducing artifacts due to field inhomogeneities, Magn Reson Imaging, 6, pp. 585-590, (1988)

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