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Journal of Korean Neurosurgical Society 2001;30(10): 1182-1186.
Clinical Usefulness of MR FLAIR Image in Mild Head Injuries.
Sei Yoon Kim, Kum Whang, Hun Joo Kim, Myoung Sup Lee
1Department of Neurosurgery, Wonju College of Medicine, Yonsei University, Wonju, Korea.
2Department of Diagnostic Radiology, Wonju College of Medicine, Yonsei University, Wonju, Korea.
ABSTRACT
OBJECTIVE
S: MR fluid-attenuated inversion recovery(FLAIR) image uses paired long inversion time and relaxation time that nulls the signal from CSF. With nulling of the CSF long echo time readout could be used to increase T2-weighting, hence improving the conspicuousness of most tissue lesions without the deleterious effects of CSF artifact seen on T2 weighted sequence. We examed the usefulness of FALIR image in the diagnosis of mild head injury.
METHODS
A total of 38 patients with mild head injury were examined by FLAIR image. We compared those images with CT scan and T1, T2-weighted images. Careful observation of MR images were done by two well-trained neuroradiologists. Each image was compared for conspicuousness and detectability of traumatic lesions might have shown abnormal signal intensities. The Wilcoxon signed ranks test was used for statistical evaluation.
RESULTS
The FLAIR image was significantly more sensitive than those of other images(p<0.001). T2 FFE(Fast Field Echo) image was more useful for detection of small petechial hemorrhages.
CONCLUSION
FLAIR image is considered to be more sensitive than those of conventional MR images in the evaluation of mild head injuries.
Key Words: MR FLAIR image; Mild head injury; Diagnosis
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