Cortical thickness difference across the central sulcus visualized in the presence of vasogenic edema.
OBJECTIVE
To confirm the cortical thickness difference across the central sulcus (CS) visualized in the presence of vasogenic edema on MRI.


METHODS
T2-weighted images of 70 cerebral hemispheres showing vasogenic edema infiltrating into subcortical white matter around the CS were studied retrospectively. Two neuroradiologists measured the cortical thickness of the anterior and posterior banks of the CS, precentral sulci (PrCS), and postcentral sulci (PoCS). Additionally, we compared the cortical thickness of the anterior and posterior banks of each sulcus visually using a grading scale.


RESULTS
On T2-weighted images, the cerebral cortex was highlighted by a high signal-intensity vasogenic edema in the adjacent white matter, and its thickness was readily measurable. The unique cortical thickness difference between the anterior and posterior banks of the CS were confirmed with measurements of 2.67 and 1.48 mm (p<0.0001). The cortical measurements across other cerebral sulci were 2.04 and 1.95 mm (NS) for the PrCS, and 1.67 and 1.77 mm (NS) for the PoCS. The cortical thickness ratios were 1.86 for the CS, 1.05 for the PrCS, and 0.96 for the PoCS. On visual evaluation, the anterior bank of the CS was thicker than the posterior bank in 93% (65/70). For the PrCS and PoCS, the thickness of the anterior and posterior banks appeared to be equal in over 70% of the patients.


CONCLUSIONS
A prominent cortical thickness difference across the CS in the presence of vasogenic edema was confirmed. This finding is considered to facilitate the identification of the CS in patients with brain tumors.
Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan. togao@dr.hosp.kyushu-u.ac.jp
Osamu
O
Togao
Takashi
T
Yoshiura
Futoshi
F
Mihara
Tomoyuki
T
Noguchi
Akio
A
Hiwatashi
Koji
K
Yamashita
Tadamasa
T
Yoshitake
Hiroshi
H
Honda
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001929:Brain Edema / Q000473:pathology*; D002540:Cerebral Cortex / Q000473:pathology*; D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D015173:Supratentorial Neoplasms / Q000473:pathology*
D003287:Contrast Media; D019786:Gadolinium DTPA