Flow ghost artifact in slice-encoding direction mimicking vestibular schwannoma in contrast-enhanced 3D spoiled gradient-echo sequence.
The value of MR imaging by post-contrast T1-weighted 3D spoiled gradient-echo (3D SPGR) is well established for the detection of small vestibular schwannomas in the cerebellopontine angle region. We describe a case in which a flow ghost artifact in the slice-encoding direction mimicked a vestibular schwannoma and heavily T2-weighted MR cisternography and multiplanar reconstruction images helped us to reach the correct diagnosis. In addition, we conducted a volunteer study to demonstrate that changing the k-space trajectory can reduce this artifact in post-contrast 3D SPGR images.
Department of Radiology, Nagoya University School of Medicine, 65 Tsurumai-cho, Shouwa-ku, 466-8550 Nagoya, Japan. naganawa@med.nagoya-u.ac.jp
Shinji
S
Naganawa
Tokiko
T
Koshikawa
Hiroshi
H
Fukatsu
Takeo
T
Ishigaki
Ikuo
I
Aoki
D000328:Adult; D016477:Artifacts; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D009442:Neurilemmoma / Q000473:pathology*; D015837:Vestibular Diseases / Q000473:pathology*