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Journal of Korean Neurosurgical Society 1998;27(6): 808-814.
Clinical Applications of Cine MR.
Kwan Young Song, Young Il Ha, Dong Soo Kang, Jung Ha Park, Sun Wook Choi
Department of Neurosurgery, Kangnam General Hospital, Public Corporation, Seoul, Korea.
ABSTRACT
Evaluation of intracranial CSF flow was accomplished by the use of cine MR technique. In the cine MR, there were two methods of evaluation in CSF flow pattern. Qualitative and quantitative methods were called magnitude reconstruction and phase contrast mapping method, respectively. The image of magnitude reconstruction method can demonstrate areas of decreased CSF flow and help explain the cause of hydrocephalus. The image of phase contrast mapping method is more sensitive to fluid motion and may increase utility in the future for analysis of fluid flow. Cine MR is capable of showing both normal and abnormal intracranial CSF flow. Such a study can be easily added as an extra pulse sequence at the end of a routinely acquired MR examination. We evaluated 2 cases of the normal pattern of pulsatile flow within subarachnoid space and 3 cases of abnormal patterns of CSF flow(communicating hydrocephalus: 2 cases, arachnoid cyst in posterior fossa: 1 case). These observations were compared with pre- and post-operative CSF flow state. In conditions which result in alterations of flow, cine MR shows either obstruction or excessively turbulent flow within the CSF pathways. In our studies, the most distinctive pathological finding was bulk flow in the aqueduct of Sylvius. The authors suggest that this technique can be applied in a wide range of conditions where CSF pathway is altered including hydrocephalus, evaluation of the function of the shunt system and communication between arachnoid cyst and subarachnoid space . Moreover correct diagnosis is possible in patients with hydrocephalus, in whom the exact level of CSF obstruction can be determined. We believe that surgical decisions can be aided by careful analysis of these CSF cine MR studies. We discuss the normal and abnormal CSF flow findings and indications of cine MR CSF flow technique with literature review.
Key Words: Cine MR; Cerebrospinal fluid flow; Hydrocephalus; Shunt; Magnetic resonance imaging
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