VISIBILITY OF CALCIUM ON MR AND CT - CAN MR SHOW CALCIUM THAT CT CANNOT

Authors
KUCHARCZYK W HENKELMAN RM
Citation
W. Kucharczyk et Rm. Henkelman, VISIBILITY OF CALCIUM ON MR AND CT - CAN MR SHOW CALCIUM THAT CT CANNOT, American journal of neuroradiology, 15(6), 1994, pp. 1145-1148
Citations number
8
Categorie Soggetti
Neurosciences,"Radiology,Nuclear Medicine & Medical Imaging
Journal title
American journal of neuroradiology → ACNP
ISSN journal
01956108
Volume
15
Issue
6
Year of publication
1994
Pages
1145 - 1148
Database
ISI
SICI code
0195-6108(1994)15:6<1145:VOCOMA>2.0.ZU;2-U
Abstract
PURPOSE: To test the hypothesis that calcium can be visible on MR imag es without being visible on CT. METHODS: Five different calcium salts ranging in concentration from 0 to 0.45 g/mL were suspended in 2% agar ose gel and studied using T2-weighted MR, T1-weighted MR, and CT. MR signal intensity, CT attenuation, and image noise were measured. Relat ive visibility was determined from these measurements. RESULTS: CT was shown to be more than 10 times as sensitive as T2-weighted MR or TI- weighted MR for the detection of calcium. CONCLUSION: MR cannot show c alcium that is occult on CT.