title: [The smart-scan procedure of spiral computed tomography. A new method for dose reduction].
abstract: OBJECTIVE
  In this article a new method - the Smart-Scan-Technique - for dose reduction during spiral computed tomography is described. This technique allows a dynamical adaptation of the tube current according to the measured local density structure form and absorption values of the object of interest. Its clinical applicability for dose reduction is investigated. In addition, changes in image quality are evaluated.
  
  
  METHODS
  Specially designed, water filled plexiglas-phantoms, an Alderson-Rando phantom, and 20 patients were used to simulate possible measures of patients within the thoracic and abdominal region. For those two regions the dose reduction, the modulation transfer function, and the pixel noise were measured.
  
  
  RESULTS
  Depending on patient geometry dose reduction up to 20% could be achieved with the Smart-Scan-Technique. This technique also enabled a decrease of the modulation transfer function and an increase of the pixel noise by 8%.
  
  
  CONCLUSIONS
  Relevant dose reductions can be achieved by applying the Smart-Scan-Technique in spiral computed tomography.
authors.affiliation: Institut für Radiodiagnostik, Universitätsklinik Innsbruck.
authors.forename: S M
authors.initials: SM
authors.lastname: Giacomuzzi
authors.forename: B
authors.initials: B
authors.lastname: Erckert
authors.forename: T
authors.initials: T
authors.lastname: Schöpf
authors.forename: M C
authors.initials: MC
authors.lastname: Freund
authors.forename: P
authors.initials: P
authors.lastname: Springer
authors.forename: A
authors.initials: A
authors.lastname: Dessl
authors.forename: W
authors.initials: W
authors.lastname: Jaschke
mesh_terms: D000042:Absorption; D016477:Artifacts; D006801:Humans; D019047:Phantoms, Imaging; D011829:Radiation Dosage; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data
vernacular_title: Das "Smart-Scan"-Verfahren der Spiral-Computertomographie: Eine neue Methode der Dosisreduktion.