2023 ISAKOS Biennial Congress ePoster
Radiographic Evaluation Of the Donor Site After Anterior Cruciate Ligament Reconstruction With Quadriceps Tendon Bone By Using T2 Mapping Mri
Shuko Tsumoto, MD, Osaka, Osaka JAPAN
Yusuke Hashimoto, MD, PhD, Sennan-Gun, Osaka JAPAN
Ken Iida, MD, Osaka JAPAN
Hiroaki Nakamura, MD, PhD JAPAN
Shimada Hospital, Habikino city, Osaka, JAPAN
FDA Status Cleared
Summary
After anterior cruciate ligament reconstruction with quadriceps tendon bone, T2 value of the donor site decreased over time, which may reflects tendon healing.
ePosters will be available shortly before Congress
Abstract
(Background)Recently, quadriceps tendon bone (QTB) has been discussed as a potential alternative graft for anterior cruciate ligament reconstruction. To our knowledge, the application of quantitative technique to assess biochemical changes associated with donor site healing with ACLR with QTB has not yet been reported.
(Objective)To determine the correlation between quantitative T2 mapping-based tendon healing and clinical outcomes during the first year after ACLR with QTB.
Material And Methods
Between April 2018 and January 2020, twenty-two patients (10 females and 12 males) with symptomatic ACL insufficiency underwent arthroscopically assisted ACL reconstructions using autologous QTB grafts by one surgeon. Serial clinical and MRI follow-up assessments were carried out at 3, 6,12 months after surgery.
The region of interest (ROI) of QT healing was defined as 1cm in width and 3 mm in depth from 2.5cm to 3.5 cm proximal to the superior pole of the patella and we measured T2 value in this area. Clinical assessments included Lyshlom score, KOOS, AKP, and pain at the donor site. We evaluate the relationship between T2 value and clinical score.
(results)T2 value of the donor site was respectively 39.7±5.5ms?35.2±3.9ms?32.9±6.7ms at 3,6,12 months after operation(p<0.05). T2 value of the ROI significantly decreased by time. Postoperative AKP score and Lyshlom score shows negative correlation between T2 value(p<0.05).
(discussion)T2 mapping allow us to evaluate biochemical alterations such as collagen fiber orientation and water concentration of the tissue. 1 year after arthroscopic rotator cuff repair, T2 value of the suture site was equal to healthy controls. This suggests that decreased T2 value reflects tissue healing. In current study, T2 value at the donor site decreased over time and this may reflect tendon healing.
(conclusion)T2 mapping would enable us to evaluate healing status of QTB donor site quantitatively.