title: Preoperative magnetic resonance imaging cross-sectional area for the measurement of hamstring autograft diameter for reconstruction of the adolescent anterior cruciate ligament.
abstract: OBJECTIVE
  We conducted this study to determine if preoperative magnetic resonance imaging (MRI) cross-sectional area measurements would correlate with intraoperative graft size in hamstring anterior cruciate ligament (ACL) reconstructions.
  
  
  METHODS
  We retrospectively reviewed ACL reconstructions performed by a single surgeon using a quadruple-looped hamstring allograft. Preoperative MRI axial images were used to determine the combined cross-sectional area of the semitendinosis and gracilis tendons. These cross-sectional areas were correlated to the intraoperative graft size.
  
  
  RESULTS
  We found a strong correlation between the MRI cross-sectional areas and graft size. If the combined cross-sectional areas were >or=18 mm(2), there was an 88% probability of obtaining a graft of sufficient size at the time of surgery.
  
  
  CONCLUSIONS
  We conclude that our technique is a reliable option to assist the surgeon with preoperative determination of graft size. This is valuable to the orthopaedist to more accurately discuss graft options with the patient and improve preoperative preparation with respect to graft choice.
  
  
  METHODS
  Level II, development of diagnostic criteria on the basis of consecutive patients with universally applied gold standard.
authors.affiliation: Department of Orthopaedic Surgery, Mount Carmel Health System, Columbus, OH 43222, USA. bickel_21@yahoo.com
authors.forename: Brent A
authors.initials: BA
authors.lastname: Bickel
authors.forename: T Ty
authors.initials: TT
authors.lastname: Fowler
authors.forename: John G
authors.initials: JG
authors.lastname: Mowbray
authors.forename: Brent
authors.initials: B
authors.lastname: Adler
authors.forename: Kevin
authors.initials: K
authors.lastname: Klingele
authors.forename: Gary
authors.initials: G
authors.lastname: Phillips
mesh_terms: D000293:Adolescent; D016118:Anterior Cruciate Ligament / Q000473:pathology / Q000601:surgery* / Q000637:transplantation*; D050376:Bone-Patellar Tendon-Bone Grafting / Q000379:methods; D002675:Child, Preschool; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007718:Knee Injuries / Q000601:surgery; D008279:Magnetic Resonance Imaging; D018482:Muscle, Skeletal / Q000473:pathology / Q000601:surgery / Q000637:transplantation*; D016119:Posterior Cruciate Ligament / Q000601:surgery / Q000637:transplantation; D019651:Plastic Surgery Procedures / Q000379:methods; D012189:Retrospective Studies; D013709:Tendon Transfer; D013710:Tendons / Q000473:pathology / Q000601:surgery / Q000637:transplantation*; D014184:Transplantation, Homologous