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J Korean Neurol Assoc. 2009;27(2):158-162.
- CT and MR Imaging Analysis of Calcification Suspensions of Different Types and Concentrations
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Young-Chil Choi
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Department of Radiology and Neurologya, School of Medicine, Konkuk University, Chungju, Korea
- 석회화의 종류와 농도에 따른 CT와 MRI 분석
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최영칠, 신현준 최진영a
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건국대학교 의학전문대학원 영상의학교실, 신경과학교실a
- Abstract
- Background
High-density calcifications on CT images can appear as high signals on T1-weighted MR images, but
with differing extents and degrees. This study investigated CT and MR images of calcifications of various types and
concentrations.
Methods
We analyzed CT and MR images of two cases of bilateral basal ganglia calcifications and experimental
suspensions of calcifications of different types and concentrations.
Results
The density of CT calcifications increased in proportion to their concentration regardless of their type. However,
the MR signals differed with the types and concentrations of calcification. A high signal was one of the most noticeable
signs on T1-weighted MR images for calcium phosphate, and it increased for concentrations up to 0.2 g/mL before
leveling off. The signal for all types of calcification decreased on T2-weighted and especially fluid-attenuated inversion
recovery (FLAIR) images.
Conclusions
High signals are characteristic of calcification on T1-weighted MR images, and are often stronger than
those on CT images. A low signal appears consistently on FLAIR MR images regardless of the calcification type. These
findings might be helpful in evaluating calcifications apparent in MR images. Key Words: Brain, Calcification, Computed tomography, Magnetic resonance
Keywords :
- 초록
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