title: Standard dose versus low-dose abdominal and pelvic CT: comparison between filtered back projection versus adaptive iterative dose reduction 3D.
abstract: OBJECTIVE
  To compare the dose and image quality of a standard dose abdominal and pelvic CT with Filtered Back Projection (FBP) to low-dose CT with Adaptive Iterative Dose Reduction 3D (AIDR 3D).
  
  
  METHODS
  We retrospectively examined the images of 21 patients in the portal phase of an abdominal and pelvic CT scan before and after implementation of AIDR 3D iterative reconstruction. The acquisition length, dose and evaluations of the image quality were compared between standard dose FBP images and low-dose images reconstructed with AIDR 3D and FBP using the Wilcoxon test.
  
  
  RESULTS
  The mean acquisition length was similar for both CT scans. There was a significant dose reduction of 49.5% with low-dose CT compared to standard dose CT (mean DLP of 451mGy.cm versus 892mGy.cm, P<0.001). There were no differences in image quality scores between standard dose FBP and low-dose AIDR 3D images (4.6±0.6 versus 4.4±0.6 respectively, P=0.147).
  
  
  CONCLUSIONS
  AIDR 3D iterative reconstruction enables a significant reduction in dose of 49.5% to be achieved with abdominal CT scan compared to FBP, whilst maintaining equivalent image quality.
authors.affiliation: Service d'Imagerie Guilloz, Hôpital Central, CHU de Nancy, 29, avenue du Maréchal-de-Lattre-de-Tassigny, 54035 Nancy cedex, France; Service d'Imagerie Médicale, Hôpital d'Instruction des Armées Legouest, 27, avenue de Plantières, BP 90001, 57077 Metz cedex 3, France. Electronic address: alban.gervaise@hotmail.fr.
authors.forename: A
authors.initials: A
authors.lastname: Gervaise
authors.affiliation: Service d'Imagerie Guilloz, Hôpital Central, CHU de Nancy, 29, avenue du Maréchal-de-Lattre-de-Tassigny, 54035 Nancy cedex, France.
authors.forename: B
authors.initials: B
authors.lastname: Osemont
authors.affiliation: Service d'Imagerie Guilloz, Hôpital Central, CHU de Nancy, 29, avenue du Maréchal-de-Lattre-de-Tassigny, 54035 Nancy cedex, France.
authors.forename: M
authors.initials: M
authors.lastname: Louis
authors.affiliation: Service d'Imagerie Guilloz, Hôpital Central, CHU de Nancy, 29, avenue du Maréchal-de-Lattre-de-Tassigny, 54035 Nancy cedex, France.
authors.forename: S
authors.initials: S
authors.lastname: Lecocq
authors.affiliation: Service d'Imagerie Guilloz, Hôpital Central, CHU de Nancy, 29, avenue du Maréchal-de-Lattre-de-Tassigny, 54035 Nancy cedex, France.
authors.forename: P
authors.initials: P
authors.lastname: Teixeira
authors.affiliation: Service d'Imagerie Guilloz, Hôpital Central, CHU de Nancy, 29, avenue du Maréchal-de-Lattre-de-Tassigny, 54035 Nancy cedex, France.
authors.forename: A
authors.initials: A
authors.lastname: Blum
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000465:Algorithms; D001027:Aortography / Q000379:methods; D016477:Artifacts; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008099:Liver / Q000000981:diagnostic imaging / Q000293:injuries; D008297:Male; D008875:Middle Aged; D061330:Multidetector Computed Tomography / Q000379:methods*; D010388:Pelvis / Q000000981:diagnostic imaging*; D011829:Radiation Dosage; D011860:Radiography, Abdominal / Q000379:methods*; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D012984:Software; D018709:Statistics, Nonparametric; D055815:Young Adult
keywords: Abdominal and pelvic CT; Dose reduction; Image quality; Iterative reconstruction; Multidetector CT