title: [Radiation exposure in single slice and multi-slice spiral CT (a phantom study)].
abstract: OBJECTIVE
  The purpose of study was to compare patient dose applying singleslice- and multislice-spiral CT.
  
  
  METHODS
  The examinations were performed with a singleslice-spiral CT (Highspeed Advantage; GE Medical Systems; Milwaukee, USA) and with a multislice CT systems (LightSpeed QX/i GE Medical Systems; Milwaukee, USA). For the determination of the radiation exposure (absorbed dose) a selection of most executed protocols (thorax-helical, abdomen-helical, petrous bone-axial, head-axial) were simulated using an Alderson Rando Phantom. The dose was determined by means of lithiumfluorid-thermoluminiscence dosimeters (TLD-GR 200).
  
  
  RESULTS
  For thorax and abdomen protocols higher energy dose values could be found using a multislice CT. On the average the energy dose values were increased by 2.6 on an average in relation to single slice spiral CT. The energy dose values of the multisclice CT using head protocols could be reduced by 30% in relation to single slice spiral CT due to suitable parameter selections. The energy dose applying a petrous bone protocol resulted in an average increase by a factor 1.5 using a multislice CT.
  
  
  CONCLUSIONS
  Using the new multislice CT technique protocol strategies must be optimized regarding the patient doses. Users can operate critically in the sense of the radiation protection only if they are aware of the occurring dose amounts to the patient.
authors.affiliation: Universitätsklinik für Radiodiagnostik, Innsbruck. Salvatore.Giacomuzzi@uibk.ac.at
authors.forename: S M
authors.initials: SM
authors.lastname: Giacomuzzi
authors.forename: P
authors.initials: P
authors.lastname: Torbica
authors.forename: M
authors.initials: M
authors.lastname: Rieger
authors.forename: C
authors.initials: C
authors.lastname: Lottersberger
authors.forename: S
authors.initials: S
authors.lastname: Peer
authors.forename: R
authors.initials: R
authors.lastname: Peer
authors.forename: R
authors.initials: R
authors.lastname: Perkmann
authors.forename: W
authors.initials: W
authors.lastname: Buchberger
authors.forename: R
authors.initials: R
authors.lastname: Bale
authors.forename: A
authors.initials: A
authors.lastname: Mallouhi
authors.forename: W
authors.initials: W
authors.lastname: Jaschke
mesh_terms: D004867:Equipment Design; D006801:Humans; D019047:Phantoms, Imaging; D011829:Radiation Dosage; D013819:Thermoluminescent Dosimetry; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*
vernacular_title: Untersuchungen zur Strahlenexposition bei der Einzelschicht- und Mehrschicht-Spiral-CT (eine Phantom-Studie).