title: Comparison of the Radiation Dose from Cone Beam Computed Tomography and Multidetector Computed Tomography in Examinations of the Hand.
abstract: OBJECTIVE
  Comparison of radiation dose of cone beam computed tomography (CBCT) and multidetector computed tomography (MDCT) in examinations of the hand.
  
  
  METHODS
  Dose calculations were carried out by means of Monte Carlo simulations in MDCT and CBCT. A corpse hand was examined in a 320-row MDCT scanner and a dedicated extremities CBCT scanner with standard protocols and multiple low-dose protocols. The image quality of the examinations was evaluated by 5 investigators using a Likert scale from 1 (very good) to 5 (very poor) regarding depiction of cortical bone, cancellous bone, joint surfaces, soft tissues and artifacts. For a sum of ratings of all structures < 50 a good overall image quality was expected. The studies with at least good overall image quality were compared with respect to the dose.
  
  
  RESULTS
  The dose of the standard examination was 13.21 (12.96 to 13.46 CI) mGy in MDCT and 7.15 (6.99 to 7.30 CI) mGy in CBCT. The lowest dose in a study with good overall image quality was 4.54 (4.43 to 4.64 CI) mGy in MDCT and 5.72 (5.59 to 5.85 CI) mGy in CBCT.
  
  
  CONCLUSIONS
  Although the dose of the standard protocols in the CBCT is lower than in the MDCT, the MDCT can realize a good overall image quality at a lower dose than the CBCT. Dose optimization of CT examination protocols for the hand is useful in both modalities, the MDCT has an even greater potential for optimization.
  
  
  CONCLUSIONS
  • Low dose examinations of the hand are feasible in CBCT and MDCT.• In default settings CBCT has a lower dose than MDCT.• MDCT enables a good image quality at a lower dose than CBCT. Citation Format: • Neubauer J, Neubauer C, Gerstmair A et al. Comparison of the Radiation Dose from Cone Beam Computed Tomography and Multidetector Computed Tomography in Examinations of the Hand. Fortschr Röntgenstr 2016; 188: 488 - 493.
authors.affiliation: Department of Radiology, University Medical Center Freiburg, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Neubauer
authors.affiliation: Department of Radiology, University Medical Center Freiburg, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Neubauer
authors.affiliation: Department of Radiology, University Medical Center Freiburg, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Gerstmair
authors.affiliation: Department of Radiology, University Medical Center Freiburg, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Krauss
authors.affiliation: Department of Orthopedics and Trauma Surgery, University Medical Center Freiburg, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Reising
authors.affiliation: Department of Plastic and Hand Surgery, University Medical Center Freiburg, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Zajonc
authors.affiliation: Department of Radiology, University Medical Center Freiburg, Germany.
authors.forename: E
authors.initials: E
authors.lastname: Kotter
authors.affiliation: Department of Radiology, University Medical Center Freiburg, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Langer
authors.affiliation: Institut of Medical Physics and Radiation Protection, University of Applied Sciences, Giessen, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Fiebich
authors.affiliation: Institut of Medical Physics and Radiation Protection, University of Applied Sciences, Giessen, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Voigt
mesh_terms: D054893:Cone-Beam Computed Tomography; D006225:Hand / Q000000981:diagnostic imaging*; D006801:Humans; D061330:Multidetector Computed Tomography; D019047:Phantoms, Imaging; D011829:Radiation Dosage