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THE DIAGNOSTIC EVALUATION OF THE CIRCULAR SCINTITOMOGRAPHY ON THE CASE SUSPECTED BRAIN TUMORS Yutaka Maki 1 , Tadao Nose 1 , Yoshihiko Yoshii 1 , Noboru Arimizu 2 , Eizo Yabumoto 2 1Department of Neurological Surgery, School of Medicine 2National Radiological Institute pp.775-782
Published Date 1974/8/1
DOI https://doi.org/10.11477/mf.1406203578
  • Abstract
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The diagnostic evaluation of the circular scinti-tomography was done 50 cases suspected brain tumors, chiefly located in the cranial floor.

We used a circular scintitomography developed by Arimizu (1970) attached Toshiba's scintillation camera, having a Nal crystal of 15 inch in diameter and 1/2 inch thick. The collimator contains 2,300 parallel round holes each inclined 30° to the face of gamma carmera crystal The rotating collimatorcan be attached and detached from the detector head as with any other collimator. Phantom studies with carmera have shown this procedure to be effective in resolving structures at various depths.

In this study, we have compared the results of scintitomogram and regular scintigrams in order to detarmine (A) whether the size and position of lesion could be defined more precisely by scintitomogra-phy. (B) whether questionable lesions and unusual anatomical variations seen on regular scintigrams could be explained by scintitomogram. (C) whether scintitomography could reveal lesions not seen in regular scintigrams.

Consequently, the scintitomography has the fol-lowing additional diagnostic aids compared with regular scintigraphy. 1) The size and site of the lesion could be more precisely discernible. 2) In the evaluation of the midline lesions, scintiomogra-phy is very useful whether the lesion is supraten-trorial or infratentorial. 3) It is very effective in the separation of the overlapping images of the extracerebral structures, which often seen in the temporal region. 4) May be helpful in the differ-enciation between the recurrence of the tumor and the radiation necrosis. 5) In a strict sense, there are no tumors which were not demonstrated in the regular scintigram but was proved to exist in thescintitomogram.


Copyright © 1974, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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