title: Three-dimensional spiral CT for neurosurgical planning.
abstract: We carried out 22 examinations to determine the value of three-dimensional (3D) volumetric CT (spiral CT) for planning neurosurgical procedures. All examinations were carried out on a of the first generation spiral CT. A tube model was used to investigate the influence of different parameter settings. Bolus injection of nonionic contrast medium was used when vessels or strongly enhancing tumours were to be delineated. 3D reconstructions were carried out using the integrated 3D software of the scanner. We found a table feed of 3 mm/s with a slice thickness of 2 mm and an increment of 1 mm to be suitable for most purposes. For larger regions of interest a table feed of 5 mm was the maximum which could be used without blurring of the 3D images. Particular advantages of 3D reconstructed spiral scanning were seen in the planning of approaches to the lower clivus, acquired or congenital bony abnormalities and when the relationship between vessels, tumour and bone was important.
authors.affiliation: Department of Neurosurgery, Technical University, Aachen, Germany.
authors.forename: H M
authors.initials: HM
authors.lastname: Klein
authors.forename: H
authors.initials: H
authors.lastname: Bertalanffy
authors.forename: L
authors.initials: L
authors.lastname: Mayfrank
authors.forename: A
authors.initials: A
authors.lastname: Thron
authors.forename: R W
authors.initials: RW
authors.lastname: Günther
authors.forename: J M
authors.initials: JM
authors.lastname: Gilsbach
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001927:Brain Diseases / Q000000981:diagnostic imaging* / Q000601:surgery; D003198:Computer Simulation; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008875:Middle Aged; D011857:Radiographic Image Interpretation, Computer-Assisted; D012888:Skull Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery; D013118:Spinal Cord Diseases / Q000000981:diagnostic imaging* / Q000601:surgery; D013120:Spinal Cord Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery; D013122:Spinal Diseases / Q000000981:diagnostic imaging* / Q000601:surgery; D013125:Spinal Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery; D013238:Stereotaxic Techniques; D014057:Tomography, X-Ray Computed / Q000379:methods*