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논문 기본 정보

자료유형
학술저널
저자정보
강진화 (서울대학교 의과대학 진단방사선과학교실)
저널정보
대한영상의학회 대한방사선의학회지 대한방사선의학회지 제24권 제6호
발행연도
1988.1
수록면
963 - 973 (11page)

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Recently computed tomography(CT) has been rapidly replaced by magnetic resonance imaging(MRI) in diagnosis of majority of intracranial diseases. But MRI still has come limitation one of which is its inferiority in detecting calcification. MRI of intracranial calcification has been known to be variable in signal intensity. We retrospectively analized the MRI of 26 patients with intracranial calcified lesions in order to evaluate the MR intensity of calcification and to assess the capability of MRI in detecting calcification in various intracranial lesions. All the MRI were obtained using routine T1-and T2-weighted spin eco pulse sequences on 2.0T super-conducting system. The 26 patients consisted of 13 brain tumors(4 oligodendrogliomas 2 caraniopharyngiomas 2 astrocytomas 1 germ cell tumor 1 medulloblastoma 1 ependymoma and pathologically uncofirmed 2 cases) 11 infectious diseases (1 paragonimiasis 1 sparganosis 2 cysticercoses 3 tuberculosis and 4 unknown cases) and 2 undetermined pathologies. Eighty-two percent (9/11) of infections disease and 50% (1/2) of undetermined group showed signal diminu-tion or signal viod on both T1-and t2-weighted image (T1W1, T2W1) Twenty-four percent (3/13) of brain tumors showed signal diminution on both T1W1 and T2W1. In 46% (6/13) and 61%(8/13) of brain tumors the signal intensities were isointense on T1W1 and T2W1 respectively. Unexpectedly 3 oligodendrogliomas showed high signal intensity on T1W1 two of which showed com plexed signal intensitymixed with high iso and low singnal intensities on T2W1. In remained cases (18% (2/11) of infectious diseases and 50% (1/2) of undetermined group) the signal intensities were mixed. With simultaneous review of CT and MRI in each case the calcification (at least one in cases showing multi-ple ones) was dientifiable on MRI in 62% (8/13) of tumors 82%(9/11) of infectious disease and 100%(2/2) in undetermined group In 36% (4/11) of infectious diseases fewer number of calcific nodules were identification of calcification of intracranial calcification on <RI seemed to be due to multiple factors including small size (less than 3mm) location (within CSF space) and the signal intensity identical to the lesion adjacent to it. It is sug-gested that new pulse sequence (i.e.gradient echo etc) may well be used as adjunctive method for detecting more calcifications and CT is still needed to detect the intracranial calcification.

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