title: [Availability of normal database by single photon emission computed tomography system with use of 3 dimensional-stereotactic surface projections].
abstract: OBJECTIVE
  The present study aims to quantitatively investigate a normal database (NDB) created under the same acquisition and reconstruction conditions for three gamma camera systems (four types of collimator systems) with use of three-dimensional stereotactic surface projections (3D-SSP). We rebuilt a NDB with use of the N-isopropyl-p-(123)I-iodoamphetamine ((123)I-IMP) SPECT data derived from 30 healthy individuals at 20 institutions nationwide. We standardized the acquisition and reconstruction conditions, evaluated Z scores using patient data (PD) and examined each compensation effect.
  
  
  RESULTS
  Z scores determined using the advanced NDB were the same value. Artifacts were often generated in Z score maps derived from the conventional NDB (CONDB). The Z score of the own site NDB (OWNDB) was 70% of that calculated based on the CONDB. The combinatorial difference in compensation (scatter and attenuation) resulted in many artifacts being generated in Z score map images.
  
  
  CONCLUSIONS
  More artifacts were generated in Z score map images using the novel NDB compared with the CONDB. The novel NDB was comparable to the performance of OWNB. The accuracy of brain function image analysis can be improved the reconstruction conditions and correcting for scatter and attenuation on both the novel NDB and PD.
authors.affiliation: Prefectual University of Hiroshima Graduate School of Comprehensive Scientific Research.
authors.forename: Hideo
authors.initials: H
authors.lastname: Onishi
authors.forename: Jun
authors.initials: J
authors.lastname: Hatazawa
authors.forename: Jyoji
authors.initials: J
authors.lastname: Nakagawara
authors.forename: Kengo
authors.initials: K
authors.lastname: Ito
authors.forename: Sang Kil
authors.initials: SK
authors.lastname: Ha-Kawa
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Masuda
authors.forename: Keiichi
authors.initials: K
authors.lastname: Sugibayashi
authors.forename: Masaaki
authors.initials: M
authors.lastname: Takahashi
authors.forename: Kei
authors.initials: K
authors.lastname: Kikuchi
authors.forename: Noboru
authors.initials: N
authors.lastname: Katsuta
mesh_terms: D000368:Aged; D016477:Artifacts; D001921:Brain / Q000098:blood supply / Q000000981:diagnostic imaging*; D002560:Cerebrovascular Circulation; D019992:Databases as Topic; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D007457:Iodine Radioisotopes; D020367:Iofetamine; D008297:Male; D008875:Middle Aged; D019275:Radiopharmaceuticals; D013238:Stereotaxic Techniques; D015899:Tomography, Emission-Computed, Single-Photon / Q000295:instrumentation*
chemical_list: D007457:Iodine Radioisotopes; D019275:Radiopharmaceuticals; D020367:Iofetamine