Hisako Imanaga

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A new syndrome of 'pure agraphia for Kanji' is described in 3 Japanese subjects with lesions in the left posteroinferior temporal region. Kanji (ideogram or morphogram) can be compared with orthographically irregular or ambiguous words in some European languages, since it is impossible to write Kanji characters unless each one of them is learned and(More)
Two cases of Rathke's cleft cysts were reported. Case 1. A 57-year-old man was admitted to our hospital on Sep. 29th. 1982, complaining of visual field defect. Visual acuity was 0.7 in the left eye and 0.1 in the right eye. Visual field examination revealed upper temporal quadrantanopsia on the left side and incomplete temporal hemianopia on the right side.(More)
Thirty-nine cases of intracranial meningiomas were analyzed to identify factors causing brain edema. Edema was significantly correlated with tumor size and the destruction of the leptomeninges and cortex. Meningotheliomatous meningioma tended to have more peritumoral edema. There was no correlation between the presence of edema and location of the tumor or(More)
Forty supratentorial meningiomas were analyzed to identify factors causing peritumoral brain edema. Parasagittal, sphenoid ridge, and olfactory groove meningiomas induced edema more frequently than those in other locations. Meningothelial meningiomas were more invasive than other types and were associated with more peritumoral edema. Brain edema correlated(More)
A case of glioblastoma multiforme of spinal cord followed by intracranial dissemination was reported. A 20-year-old man was admitted on Sep. 22, 1981, with motor disturbance of both legs and loss of urinary control. Neurological examination showed spastic paraplegia with bilateral Babinski signs. Abdominal and cremaster reflexes were absent. There was no(More)
The aim of this report is to assess the possibility of digital processing of computed tomography for histological diagnosis of brain tumors. For this purpose, percent histograms of x-ray attenuation value of lesions were analysed in 113 cases of histologically verified hemispheric tumors. Sixteen histograms obtained from normal brain parenchyma served as(More)
Findings of computerized tomography (CT) in 183 cases of head injury in children were investigated with special reference to CT findings of mild head injury. As was expected, CT findings of mild head injury fell within the normal range, in almost all cases. However, abnormal findings were noticed in 4 out of 34 cases (12%) in acute stage and 7 out of 76(More)
In the previous reports, the theoretical background [corrected] and technical details of the Isocount scanning were described. Based on clinical experiences of various brain diseases, the newly developed scanning method was confirmed to be more useful than the conventional scintiscanning. Besides the new scanning method, a new display system was also(More)