Radiology, Vol 157, 103-106, Copyright © 1985 by Radiological Society of North America
Brain tumors: detection and typing by use of CPMG sequences and in vivo T2 measurements
PA Rinck, S Meindl, HP Higer, EU Bieler and P Pfannenstiel
A spin-echo sequence with 24 echoes (Carr-Purcell-Meiboom-Gill sequence)
was evaluated to determine the usefulness of magnetic resonance (MR) in
detecting and typing brain tumors. The TEs in these examinations were
between 28 and 346 msec, and the TR was 860, 1260, or 1660 msec. The
results of the MR examination of 32 histopathologically proved tumors are
presented. All but one tumor could be detected by MR. Tumors generally were
obvious on MR due to the higher contrast enhancement of these lesions,
especially with a TE longer than 100 msec. T2 values calculated from an
eight-point fit, however, did not allow discrimination of different tumors,
nor did they allow differentiation between tumor, inflammatory tissue, and
demyelination.
