MAGNETIC-RESONANCE ARTIFACT IN THE POSTOPERATIVE CERVICAL-SPINE - A POTENTIAL PITFALL

被引：12

作者：

PETERMAN, SB

HOFFMAN, JC

MALKO, JA

机构：

[1] Emory University School of Medicine, Department of Radiology Section of Neuroradiology, Atlanta, GA

来源：

SPINE | 1991年 / 16卷 / 07期

关键词：

Anterior cervical surgery; Magnetic resonance image artifact; Surgical drill;

D O I：

10.1097/00007632-199107000-00005

中图分类号：

R74 [神经病学与精神病学];

学科分类号：

摘要：

An magnetic resonance imaging artifact that simulates hypertrophic bone formation is described in patients who have had an anterior cervical discectomy. The magnetic resonance images of 26 patients with anterior cervical discectomy were retrospectively reviewed. Comparison was made to the available concurrent computed tomographic scans, computed tomographic myelograms, and operative reports. A bovine spine was drilled with a drill only at one level and with a metal suction tip in close proximity to the drill at another level, and magnetic resonance images were obtained. Artifact was present in 12 patients and absent in 14; this was confirmed in the 8 patients with comparison studies. Close correlation was seen with the prospective reading of the presence of artifact and operative drill use and the absence of artifact and no operative drill use in the seven patients with available operative reports. The bovine spine model showed no artifact at the drill-only level and significant artifact at the level where the metal suction tip was positioned next to the drill. Small metal flecks were seen grossly at the second level, but not on plain roentgenograms. The metallic magnetic resonance artifact seen in postoperative cervical spines is probably from small bits of metal from the metal suction tip as it occasionally hits the drill. Bone abnormalities seen on magnetic resonance imaging at the level of a previous anterior cervical discectomy may need a cervical computed tomogram to confirm the findings.

引用

页码：721 / 725

页数：5

共 12 条

[1]

Bradley W.G., Newton T.H., Crooks L.E., Physical principles of nuclear magnetic resonance, Advanced Imaging Techniques, 2, 3, pp. 15-61, (1983)

[2]

Brown B.M., Schwartz R.H., Frank E., Blank N.K., Preoperative evaluation of cervical radiculopathy and myelopathy by surface-coil MR imaging, AJNR 9:859-866, 1988

[3]

AJR, 151, pp. 1205-1212, (1988)

[4]

Enzmann D.R., Rubin J.B., Cervical spine: MR imaging with a partial flip angle, gradient-refocused pulse sequence. Part I. General considerations and disk disease, Radiology, 166, pp. 467-472, (1988)

[5]

Hedberg M.C., Draycr B.P., Flom R.A., Hodak J.A., Bird C.R., Gradient echo (GRASS) MR imaging in cervical radiculopathy, AJNR 9:145-151, 1988

[6]

AJR, 150, pp. 683-689, (1988)

[7]

Heindel W., Friedmann G., Bunke J., Et al., Artifacts in MR imaging after surgical intervention, J Comput Assist Tomogr, 10, pp. 596-599, (1986)

[8]

Karnaze M.G., Gado M.H., Sartor K.J., Hodges F.J., Comparison of MR and CT myelography in imaging the cervical and thoracic spine, AJNR 8:983-989, 1987

[9]

AJR, 150, pp. 397-403, (1988)

[10]

Norfray J.F., Echoes T.J., Simplified. AJNR, 10, pp. 209-210, (1989)

← 1 2 →