title: Usefulness of oblique coronal and sagittal MR images of the knee after double-bundle and selective anterior cruciate ligament reconstructions.
abstract: BACKGROUND
  The use of double-bundle and selective-bundle anterior cruciate ligament (ACL) reconstruction is increasing. Few studies have been conducted to determine the diagnostic efficacy of additional oblique views of knee magnetic resonance imaging (MRI) for grading ACL graft injury for double-bundle and selective-bundle ACL reconstructions.
  
  
  OBJECTIVE
  To evaluate the diagnostic value of combining oblique coronal and sagittal imaging with orthogonal views for diagnosis of ACL graft failure after double-bundle or selective-bundle ACL reconstruction.
  
  
  METHODS
  This retrospective study included 64 patients who underwent double-bundle or selective-bundle ACL reconstruction surgery and received oblique coronal and oblique sagittal MRI of the knee. Subjective scoring of the images was performed by two radiologists who assessed the possibility of ACL graft failure based on full length view, full width view, and margin sharpness according to a 4-point scale. Diagnostic performance for ACL graft failure based on orthogonal views alone, ACL views alone, and orthogonal views with additional ACL views was evaluated by calculating the sensitivity, specificity, and accuracy.
  
  
  RESULTS
  The full length scores and total scores on ACL views were significantly higher than those of orthogonal views. The specificities and accuracies of diagnoses were highest for a combination of orthogonal, ACL sagittal, and ACL coronal views.
  
  
  CONCLUSIONS
  After double-bundle or selective-bundle ACL reconstruction, oblique sagittal and coronal images of the ACL provide better anatomic evaluation of the ACL than orthogonal views and specificity and accuracy of diagnoses were improved when oblique views were combined.
authors.affiliation: Department of Radiology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Republic of Korea.
authors.forename: Sol Ip
authors.initials: SI
authors.lastname: Kim
authors.affiliation: Department of Radiology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Republic of Korea parkhiji@gmail.com.
authors.forename: Hee Jin
authors.initials: HJ
authors.lastname: Park
authors.affiliation: Department of Radiology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Republic of Korea.
authors.forename: So Yeon
authors.initials: SY
authors.lastname: Lee
authors.affiliation: Department of Radiology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Republic of Korea.
authors.forename: Eun Chul
authors.initials: EC
authors.lastname: Chung
authors.affiliation: Department of Radiology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Republic of Korea.
authors.forename: Heon Ju
authors.initials: HJ
authors.lastname: Kwon
authors.affiliation: Department of Radiology, Soonchunhyang University Bucheon Hospital, Republic of Korea.
authors.forename: Jang Gyu
authors.initials: JG
authors.lastname: Cha
authors.affiliation: Division of Musculoskeletal Radiology, Department of Radiology, Gangnam Severance Hospital, Yonsei University College of Medicine, Republic of Korea.
authors.forename: Sungjun
authors.initials: S
authors.lastname: Kim
mesh_terms: D000293:Adolescent; D000328:Adult; D016118:Anterior Cruciate Ligament / Q000473:pathology* / Q000601:surgery; D059549:Anterior Cruciate Ligament Reconstruction / Q000379:methods*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D007719:Knee Joint / Q000473:pathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000175:diagnosis*; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D055815:Young Adult
keywords: MR; anterior cruciate ligament; double-bundle; knee; oblique; reconstruction; selective bundle