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Comparative Study
. 1994 Jun;15(6):1145-8.

Visibility of calcium on MR and CT: can MR show calcium that CT cannot?

W Kucharczyk  1 , R M Henkelman
Affiliations
Comparative Study

Visibility of calcium on MR and CT: can MR show calcium that CT cannot?

W Kucharczyk et al. AJNR Am J Neuroradiol. 1994 Jun.

Abstract

Purpose: To test the hypothesis that calcium can be visible on MR images without being visible on CT.

Methods: Five different calcium salts ranging in concentration from 0 to 0.45 g/mL were suspended in 2% agarose gel and studied using T2-weighted MR, T1-weighted MR, and CT. MR signal intensity, CT attenuation, and image noise were measured. Relative visibility was determined from these measurements.

Results: CT was shown to be more than 10 times as sensitive as T2-weighted MR or T1-weighted MR for the detection of calcium.

Conclusion: MR cannot show calcium that is occult on CT.

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