Hajimu Goto MD, PhD, Presenter: Nothing to Disclose

Shingo Hashimoto MD, PhD, Abstract Co-Author: Nothing to Disclose

Takaki Maeda MD, Abstract Co-Author: Nothing to Disclose

Yuki Iwama MD, Abstract Co-Author: Nothing to Disclose

Nobukazu Aoyama RT, Abstract Co-Author: Nothing to Disclose

Yoshiharu Ohno MD, PhD, Abstract Co-Author: Research Grant, Toshiba Corporation Research Grant, Koninklijke Philips NV Research Grant, Bayer AG Research Grant, DAIICHI SANKYO Group Research Grant, Eisai Co, Ltd Research Grant, Terumo Corporation Research Grant, Fuji Yakuhin Co, Ltd Research Grant, FUJIFILM Holdings Corporation Research Grant, Guerbet SA

Kazuro Sugimura MD, PhD, Abstract Co-Author: Research Grant, Toshiba Corporation Research Grant, Koninklijke Philips NV Research Grant, Bayer AG Research Grant, Eisai Co, Ltd Research Grant, DAIICHI SANKYO Group

To assess the usefulness of T1rho values and T2 values for evaluating cartilage repair after surgery for femoroacetabular impingment (FAI) throught the comparison of pre-operative and post-operative T1rho values and T2 values of cartilage and their correlation with MHHS scores.

A total of 96 cartilage segments(anterior zone, anterior-superior zone, superior-posterior zone, and posterior zone in injured and control cartilage) in 12 FAI patients (4 male 8 female;  median  age, 22 years) were examined at a 3.0T MRI. Mean pre-operative and post-operative(6 monthes after operation) T1rho values and T2 values of the anterior-superior zone and the superior-posterior zone of the injured cartilage area and of control cartilage area were compared. The differences between the T1rho values and T2 values were determined using a paired t-Test. In addition, the MHHS scores of all patients were determined and compared with the T1rho values and T2 values of the anterior-superior zone and the superior-posterior zone of the injured cartilage area and the control cartilage area. The relationships between the MHHS score and MRI imaging parameters were evaluated using non-parametric regression analysis. Statistical significance was defiend as p <0.05.

The MHHS score was significantly correlation with T1rho values in both the anterior-superior zone (R2=0.712 and p=0.008) and superior-posterior zone (R2=0.667 and p=0.013) of the injured cartilage area.There was also a significant correlation between the MHHS score and the T2 values of the anterior-superior zone of the injured cartilage(R2=0.585 and p=0.016). Comparing the pre-operative and post-operative MRI imaging parameters, except for the T2 values in the anterior-superior zone in the control cartilage, post-operative T1rho values and T2 values were significantly lower than those of pre-operative values in other zones of the injured and control cartilage.

T1rho values and T2 values can detect post-operative cartilage change in FAI. T1rho values and T2 values are correrated with the clinical condition of FAI.

Biochemical MRI techniques(T1rho values and T2 values)have potential benefits for evaluating cartilage repair following surgery for FAI.

Goto, H, Hashimoto, S, Maeda, T, Iwama, Y, Aoyama, N, Ohno, Y, Sugimura, K, Comparison of Pre-operative T1rho Values and T2 Values of Cartilage Imaging in Femoroacetabular Impingement with Post-operative T1rho Values and T2 Values of Cartilage Imaging.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14005696.html