摘要:

Stress placed on the ankle from sport activity predisposes it to a variety of injuries. MRI, with its multiplanar capability and excellent soft tissue contrast, is uniquely suited for examining the complex anatomy of the ankle. It is the procedure of choice for imaging suspected tendon and cartilage damage. It is also highly sensitive in detecting radiographically occult bone injuries. This review first addresses technical factors important in generating high-resolution images that are crucial for accurate diagnosis in this area. Pathogenesis and MRI appearance of commonly encountered sport-related soft tissue and bone injuries around the ankle are presented and discussed.

ISSN:0885-9698    

出版商:OVID    

年代:1992

数据来源: OVID

摘要:

MR is rapidly establishing itself as a premiere imaging modality for the assessment of musculoskeletal trauma. Its-utility in the evaluation of the menisci and ligaments of the knee is well known, but there is far less known about the use of MR for evaluation of the tendons. MR, by virtue of its unmatched soft tissue resolution capability, can determine not only the contour of an affected tendon, but the tendon sheath and internal signal alterations that accompany tendonitis, partial and complete ruptures. Injuries to the Achilles tendon are well known to the athlete and the imager alike; however, abnormalities of the posterior tibial tendon, peroneal tendon, and flexor hallucis longus also result in significant clinical symptoms, as well as imaging abnormalities.

ISSN:0885-9698    

出版商:OVID    

年代:1992

数据来源: OVID

摘要:

MRI is an accurate technique for diagnostic evaluation of a broad spectrum of shoulder pathology. In particular, rotator cuff injuries are a frequent cause of pain and disability. The mechanism of injury to the supraspinatus tendon usually begins with microscopic tears of fibers of the triple helix collagen molecule. This leads to increased motion of the bound water within the collagen molecule that lengthens the effective T2 of the tendon, allowing short TE imaging sequences to detect signal in abnormal tendons. Clinically significant disease probably does not occur without frank collagen rupture, and the associated collection of free water within the severely diseased tendon presents as high signal on long TE images. Thus, the clinical significance of tendon disease is best evaluated on long TR, long TE image acquisitions. Any process that accelerates microscopic tear formation or delays repair can increase a patient's risk of supraspinatus tendon tears. Impingement is the most important process accelerating microscopic tear formation. MRI's multiplanar, tomographic imaging ability markedly improves the ability to sensitively and specifically detect bony impingement. Hopefully, this will allow earlier arthroscopic decompression and improved patient prognosis with impingement.

ISSN:0885-9698    

出版商:OVID    

年代:1992

数据来源: OVID

摘要:

Exertion-related muscle pain is frequent in athletes and patients alike; however, its severity and significance may be difficult to assess clinically. MRI can be used to evaluate myalgia, strains, delayed-onset muscle soreness, chronic muscle overuse syndromes, muscle contracture, and sequellae of muscle injuries such as myositis ossificans and compartment syndrome. MRI documents the distribution of affected muscles, the presence of focal hematoma, fascial herniation, and subsequent healing, fibrosis, or fatty infiltration. MRI is useful in evaluating acute and delayed exertional muscle injuries.

ISSN:0885-9698    

出版商:OVID    

年代:1992

数据来源: OVID

摘要:

The patellofemoral joint is one of the most common sources of painful symptoms encountered by athletes and is one of the most frequently injured joints. Patellar incongruency is the primary pathologic condition that affects the patellofemoral joint and has been reported to be associated with patellar subluxation, patellar dislocation, chondromalacia, and arthrosis. The diagnosis of patellofemoral incongruency by physical examination alone is extremely difficult because the clinical signs may simulate other types of internal derangements of the knee, and there is a high incidence of combined abnormalities. In consideration of these issues, a kinematic MRI technique was developed to identify and characterize abnormal anatomic and functional aspects of the patellofemoral joint. Because the patellofemoral joint is often injured in athletes and patellofemoral incongruency is a common site of their pain, this article will discuss the use of kinematic MRI to assess the anatomy and function of the patellofemoral joint, with an emphasis toward special problems that may be found in relation to sports-related activities.

ISSN:0885-9698    

出版商:OVID    

年代:1992

数据来源: OVID