Karjalainen P T, Ahovuo J, Pihlajamäki H K, Soila K, Aronen H J
Department of Radiology, Helsinki University Central Hospital, Finland.
Acta Radiol. 1996 Sep;37(5):639-46. doi: 10.1177/02841851960373P244.
To evaluate and compare MR and US findings in an unselected group of patients with 1-3-year-old surgically repaired complete ruptures of the Achilles tendon.
Thirteen patients with complete Achilles tendon rupture underwent clinical, MR and US examinations. The average time interval from rupture to postoperative imaging was 18 months.
The cross-sectional area of a postoperative tendon was 4.2 times that of the unaffected side. The shape of the operated tendon was more rounded than the unaffected side and it had irregular margins both in MR imaging and in US examination. In 4 of 13 cases an intratendinous area of intermediate to high signal intensity on proton density- and T2-weighted images was seen on MR. The size of this area varied from 4 to 18% of the cross-sectional tendon area. Two patients with the largest intratendinous area had poor clinical outcome. On US the tendon had mixed echogenicity in all cases and the tendon bands were thinner and shorter than normal. Comparison of dimension between MR and US revealed that in a.p. dimension the correlation was good (r = 0.87, p = 0.001), but in transversal width there was no significant correlation (r = 0.58, p = 0.06).
The increased size and round irregular area of the operated Achilles tendon rupture was well detected by both MR and US, but intratendinous lesions were seen only by MR.
评估并比较在一组未经过挑选的、年龄为1至3岁且接受过手术修复的跟腱完全断裂患者中的磁共振成像（MR）和超声（US）检查结果。
13例跟腱完全断裂患者接受了临床、MR及US检查。从断裂至术后成像的平均时间间隔为18个月。
术后肌腱的横截面积是未受影响侧的4.2倍。手术侧肌腱的形状比未受影响侧更圆，在MR成像和US检查中其边缘均不规则。在13例患者中的4例，在质子密度加权像和T2加权像上可见肌腱内中等至高信号强度区域。该区域大小占肌腱横截面积的4%至18%。肌腱内区域最大的2例患者临床结果较差。在US检查中，所有病例的肌腱均呈混合回声，肌腱束比正常情况更细且更短。MR与US测量维度的比较显示，前后径维度的相关性良好（r = 0.87，p = 0.001），但横向宽度无显著相关性（r = 0.58，p = 0.06）。
MR和US均能很好地检测出手术修复后的跟腱断裂处增大的尺寸及圆形不规则区域，但仅MR能发现肌腱内病变。
