I. Imaoka et al., OVARIAN CYSTIC TERATOMAS - VALUE OF CHEMICAL FAT-SATURATION MAGNETIC-RESONANCE-IMAGING, British journal of radiology, 66(791), 1993, pp. 994-997
Chemical fat saturation (FS) magnetic resonance imaging (MRI) for the
characterization of ovarian cystic teratoma was evaluated in 19 patien
ts with 22 lesions. The tumour was evaluated for signal intensity, loc
ation and size; the presence of chemical shift artefact, debris and fa
t-fluid level. Ovarian cystic teratoma was diagnosed prospectively if
the mass contained fat and/or more than one type of internal pattern o
n (1) SE T1-, T2-, (2) SE T1-, T2-, FS T1-weighted images. A correct d
iagnosis was reached in 17 of 22 tumours on conventional T1- and T2-we
ighted images, and in 21 of 22 tumours when fat-saturation images were
added. When fat-saturation images were added, four of five tumours mi
sdiagnosed on conventional images were then correctly diagnosed. These
tumours contained only small amounts of fat. Fat-saturation images co
uld detect smaller amounts of fat than conventional images. However, o
ne tumour did not show decreased intensity on fat saturation images, a
nd was not diagnosed even when fat-saturation images were added. Fat s
aturation images have been shown to be of value in diagnosing cystic t
eratomas.