title: MDCT versus digital radiography in the evaluation of bone healing in orthopedic patients.
abstract: OBJECTIVE
  Assessment of bone healing in orthopedic patients is usually monitored by radiographs in two views. The purpose of our study was to compare multiplanar reconstructions from MDCT data sets with digital radiographs for assessing the extent of bone healing.
  
  
  METHODS
  Forty-three orthopedic patients (19 women, 24 men) who underwent MDCT and radiography after arthrodesis, fractures, or spinal fusions were included in our study. MDCT was performed on an MX 8000IDT scanner and served as the gold standard. The technical parameters were adapted to the anatomic region. A bone algorithm for reconstruction was used (3,500/600 H). Multiplanar reconstructions were calculated in two orthogonal planes. All patients underwent digital radiography on a Multix FD system in two views according to standard procedures. Multiplanar reconstructions and radiographs were analyzed by two musculoskeletal radiologists in a consensus interpretation to determine bone healing using a semiquantitative approach.
  
  
  RESULTS
  In 27 patients (63%), MDCT and digital radiography were concordant with regard to the extent of bone healing, whereas in 16 patients (37%) the results were not concordant. In eight patients (19%) digital radiographs underestimated the extent of bone healing, whereas in another eight patients (19%) they overestimated the degree of fusion.
  
  
  CONCLUSIONS
  MDCT using high-quality 2D reformatting is recommended as the primary imaging technique for the evaluation of bone healing.
authors.affiliation: Department of Radiology, Medical University of Vienna, Waehringer Guertel 18-20, Vienna 1090, Austria. christian.krestan@meduniwien.ac.at
authors.forename: Christian R
authors.initials: CR
authors.lastname: Krestan
authors.forename: Helge
authors.initials: H
authors.lastname: Noske
authors.forename: Violeta
authors.initials: V
authors.lastname: Vasilevska
authors.forename: Michael
authors.initials: M
authors.lastname: Weber
authors.forename: Gerd
authors.initials: G
authors.lastname: Schueller
authors.forename: Herwig
authors.initials: H
authors.lastname: Imhof
authors.forename: Christian
authors.initials: C
authors.lastname: Czerny
mesh_terms: D005260:Female; D017102:Fracture Healing; D006801:Humans; D008297:Male; D019637:Orthopedic Procedures; D011856:Radiographic Image Enhancement; D012189:Retrospective Studies; D013123:Spinal Fusion; D014057:Tomography, X-Ray Computed / Q000379:methods