Resolution of homonymous visual field loss documented with functional magnetic resonance and diffusion tensor imaging.
A 68-year-old man developed right homonymous hemianopic paracentral scotomas from acute infarction of the left extrastriate area. He was studied over the ensuing 12 months with visual fields, conventional MRI, functional MRI (fMRI), and diffusion tensor imaging (DTI). As the visual field defect became smaller, fMRI demonstrated progressively larger areas of cortical activation. DTI initially showed that the lesioned posterior optic radiations were completely interrupted. This interruption lessened in time and had disappeared by one year after onset. fMRI and DTI are innovative measures to follow functional and structural recovery in the central nervous system. This is the first reported application of these imaging techniques to acute cerebral visual field disorders.
Yoshida
Masaki
M
Department of Radiology,Tokyo Metropolitan Ebara Hospital, Tokyo, Japan. masakiy@jikei.ac.jp
Ida
Masahiro
M
Nguyen
Thien Huong
TH
Iba-Zizen
Marie-Therese
MT
Bellinger
Luc
L
Stievenart
Jean Louis
JL
Nagao
Takehiko
T
Kikuchi
Shinsuke
S
Hara
Takaaki
T
Shiba
Takuya
T
Kitahara
Kenji
K
Cabanis
Emmanuel Alain
EA
D000368:Aged; D002544:Cerebral Infarction / Q000150:complications* / Q000175:diagnosis; D038524:Diffusion Magnetic Resonance Imaging / Q000379:methods*; D005500:Follow-Up Studies; D006423:Hemianopsia / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D006801:Humans; D008297:Male; D012075:Remission, Spontaneous; D014793:Visual Cortex / Q000098:blood supply*; D058609:Visual Field Tests; D014794:Visual Fields