Surgical treatment of rotator cuff tears significantly reduces painful symptoms and improves functional capacity in many patients. However, despite recent advances, up to 25% of patients remain symptomatic after surgery. This has led to research into the reasons for these poor outcomes, including how to identify them with imaging methods and how to avoid them through new therapeutic approaches. Based on our clinical experience, we review the available treatment alternatives for rotator cuff tears, analyzing the main areas of controversy and the possible causes of unsatisfactory outcome after surgery. Furthermore, we review the expectations, difficulties, and requirements of diagnostic imaging in the follow- up of surgically treated rotator cuffs, with special emphasis on the MRI findings and their clinical impact.

Keywords: rotator cuff - surgery - magnetic resonance imaging

Introduction: Nowadays the ultrasound constitutes a tool of the first choice for the patients´ diagnosis with pathology of the muscular system. Its is a dependent operator, needs of the knowledge of some anatomical and technical concepts that help us to provide images of sufficient diagnostic quality. With experience it is an examination relatively easy to realize, highly reliably and with high availability. Its major advantage with other methods of image is the possibility of effecting the study in dynamic form. The development of the widespread image has improved considerably the possibility of demonstrating the royal extension of some pathological processes.

Conclusion: The US of high resolution provides excellent resolution of the muscular fabric and of the superficial adjacent planes, which it allows us to evaluate patients with a wide variety of pathologys.

Key words: Ultrasound (US), Magnetic Resonance (MR), muscular pathology, muscular breaks, muscular structure, epimisium, endomysium, perimysium.

MR arthrography of the hip with emphasis on femoroacetabular impingement

Abstract
Hip pain is a common complaint in patients of all ages. Recent advances in imaging and treatment are changing the approach to the evaluation and management of hip pain. Abnormal femoral and acetabular morphology and lesions of the acetabular labrum and cartilage are increasingly recognized as crucial in the development of degenerative changes. In addition, femoroacetabular impingement is increasingly recognized as an etiologic factor in hip pain. This article discusses techniques for MR arthrography of the hip, normal anatomy at hip MR arthrography, common intra-articular pathologies in patients with hip pain, and imaging fi ndings of femoroacetabular impingement.

KEYWORDS Hip; Impingement; Labrum; MRI; MR arthrography