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KMID : 0359720090270020158
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Journal of the Korean Neurological Association
2009 Volume.27 No. 2 p.158 ~ p.162
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CT and MR Imaging Analysis of Calcification Suspensions of Different Types and Concentrations
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Choi Young-Chil
Shin Hyun-Joon
Choi Jin-Yong
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Abstract
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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.
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KEYWORD
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Brain, Calcification, Computed tomography, Magnetic resonance
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