title: Can we predict the size of frequently used autografts in ACL reconstruction?
abstract: OBJECTIVE
  This study presents a method to measure the size of quadriceps, patellar tendon and hamstring autografts using preoperative magnetic resonance imaging (MRI).
  
  
  METHODS
  Sixty-two subjects with a mean age of 25 ± 10 years who underwent ACL surgery between 2011 and 2014 were included. Patient anthropometric data were recorded for all subjects. During surgery, the respective autograft was harvested and measured using commercially available graft sizers. MRI measurements were performed by two raters, who were blinded to the intra-operative measurements.
  
  
  RESULTS
  The inter- and intra-rater reliability was ≥0.8 for all MRI measurements. The intra-class correlation coefficient between the MRI measurement of the graft and the actual size of the harvested graft was 0.639. There were significant correlations between quadriceps tendon thickness and height (r = 0.3, p < 0.03), weight (r = 0.3, p < 0.01), BMI (r = 0.3, p < 0.04) and gender (r = -0.4, p < 0.002) and patellar tendon thickness and height (r = 0.4, p < 0.01), weight (r = 0.3, p < 0.01) and gender (r = -0.4, p < 0.012).
  
  
  CONCLUSIONS
  Preoperative MRI measurements of quadriceps, patellar tendon and hamstring graft size are highly reliable with moderate-to-good accuracy. Significant correlations between patient anthropometric data and the thicknesses of the quadriceps and patellar tendons were observed. Obtaining this information can be useful for preoperative planning and to help counsel patients on appropriate graft choices prior to surgery.
  
  
  METHODS
  III.
authors.affiliation: Department of Orthopaedic Surgery, University of Pittsburgh, Kaufman Building Suite 1011, 3471 Fifth Avenue, Pittsburgh, PA, 15213, USA.
authors.forename: Philip
authors.initials: P
authors.lastname: Zakko
authors.affiliation: Department of Orthopaedic Surgery, University of Pittsburgh, Kaufman Building Suite 1011, 3471 Fifth Avenue, Pittsburgh, PA, 15213, USA.
authors.forename: Carola F
authors.initials: CF
authors.lastname: van Eck
authors.affiliation: Department of Orthopaedic Surgery, University of Pittsburgh, Kaufman Building Suite 1011, 3471 Fifth Avenue, Pittsburgh, PA, 15213, USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Guenther
authors.affiliation: Department of Orthopaedic Surgery, University of Pittsburgh, Kaufman Building Suite 1011, 3471 Fifth Avenue, Pittsburgh, PA, 15213, USA.
authors.forename: James J
authors.initials: JJ
authors.lastname: Irrgang
authors.affiliation: Department of Orthopaedic Surgery, University of Pittsburgh, Kaufman Building Suite 1011, 3471 Fifth Avenue, Pittsburgh, PA, 15213, USA. ffu@upmc.edu.
authors.forename: Freddie H
authors.initials: FH
authors.lastname: Fu
mesh_terms: D000293:Adolescent; D000328:Adult; D016118:Anterior Cruciate Ligament / Q000601:surgery; D059549:Anterior Cruciate Ligament Reconstruction / Q000379:methods*; D000886:Anthropometry; D064592:Autografts / Q000033:anatomy & histology / Q000502:physiology* / Q000637:transplantation*; D001835:Body Weight; D005260:Female; D000070633:Hamstring Muscles / Q000502:physiology / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D050380:Monckeberg Medial Calcific Sclerosis; D017847:Patellar Ligament / Q000502:physiology / Q000601:surgery; D052097:Quadriceps Muscle / Q000502:physiology / Q000601:surgery; D015203:Reproducibility of Results; D014182:Transplantation, Autologous; D055815:Young Adult
keywords: ACL; Graft size measurement; Hamstring autograft; MRI; Patellar tendon autograft; Quadriceps tendon autograft