Are hepatic and muscle T2 values different at 0.5 and 1.5 Tesla?

Published

Journal Article

In an effort to determine whether T2 values of liver and muscle change with increasing field strength, 144 abdominal MR examinations were retrospectively evaluated. These patients were evaluated with a dual echo T2-weighted spin-echo sequence. Eighty-two of the examinations were performed at 0.5 Tesla and 72 at 1.5 Tesla (T). Eleven of the patients were evaluated with both MR systems with the same sequences. T2 values were also obtained from a Fe NH4(SO4)2 12H2O phantom. The T2 values of liver decreased from 57.8 +/- 11.3 at 0.5 T to 43.7 +/- 8.3 at 1.5 T. The T2 values of muscle decreased from 44.2 +/- 9 at 0.5 T to 35.4 +/- 7.2 at 1.5 T. Patients who were examined on both systems also demonstrated a decrease in both liver and muscle T2 values. For concentrations in the range of hepatic T2's, the phantom demonstrated a decrease in T2 values from 0.5 to 1.5 T ranging from 20.3 to 23.4%. All the T2 changes were statistically significant (p less than .05). The findings suggest that T2 values may depend on field strength, or may vary due to other hardware-related differences.

Full Text

Duke Authors

Cited Authors

  • Bernardino, ME; Chaloupka, JC; Malko, JA; Chezmar, JL; Nelson, RC

Published Date

  • July 1, 1989

Published In

Volume / Issue

  • 7 / 4

Start / End Page

  • 363 - 367

PubMed ID

  • 2811617

Pubmed Central ID

  • 2811617

International Standard Serial Number (ISSN)

  • 0730-725X

Language

  • eng

Conference Location

  • Netherlands