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Abstract

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

W Kucharczyk and R M Henkelman
American Journal of Neuroradiology June 1994, 15 (6) 1145-1148;
W Kucharczyk
Department of Radiology, University of Toronto, Ontario, Canada.
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R M Henkelman
Department of Radiology, University of Toronto, Ontario, Canada.
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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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American Journal of Neuroradiology
Vol. 15, Issue 6
1 Jun 1994
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Visibility of calcium on MR and CT: can MR show calcium that CT cannot?
W Kucharczyk, R M Henkelman
American Journal of Neuroradiology Jun 1994, 15 (6) 1145-1148;

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Visibility of calcium on MR and CT: can MR show calcium that CT cannot?
W Kucharczyk, R M Henkelman
American Journal of Neuroradiology Jun 1994, 15 (6) 1145-1148;
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