title: Use of preoperative 3D CT/MR fusion images and intraoperative CT to detect lesions that spread onto the brain surface.
abstract: OBJECTIVE
  Preoperative 3D CT/MR fusion images were prepared for preoperative evaluations and intraoperative assistance for the following lesions: arteriovenous -malformations (AVMs), meningiomas, and metastatic tumors that spread onto the brain surface.
  
  
  METHODS
  We prepared 3D CT/MR fusion images for 4 AVMs, 13 meningiomas, and 7 metastatic tumors, and demonstrate representative cases. Data acquired from 16-slice multidetector CT and 1.5-T MRI were used. The volume rendering technique was used. During operations, mobile 16-slice multidetector CT was used to update information.
  
  
  RESULTS
  Even after opening the dura mater, the relationship between a brain surface lesion and the surrounding structures on the preoperative 3D fusion images corresponded to the patient's operation field. Updated information via intraoperative CT was useful because operation fields might change owing to the brain shift. These images made extirpations of lesions easier and less invasive.
  
  
  CONCLUSIONS
  Not only the preoperative 3D information, but also intraoperative CT information are beneficial for smooth and safe operations.
authors.affiliation: Department of Neurological Surgery, Katagi Neurosurgical Hospital, Ehime, Japan. shiro@kms.ac.jp
authors.forename: Shiro
authors.initials: S
authors.lastname: Yamashita
authors.forename: Mutsuo
authors.initials: M
authors.lastname: Fujisawa
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Kodama
authors.forename: Motonori
authors.initials: M
authors.lastname: Ishikawa
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Katagi
mesh_terms: D000368:Aged; D001165:Arteriovenous Malformations / Q000473:pathology / Q000601:surgery; D001921:Brain / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D001932:Brain Neoplasms / Q000473:pathology / Q000601:surgery; D003287:Contrast Media; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011300:Preoperative Care / Q000379:methods*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed
chemical_list: D003287:Contrast Media