Radiographic/MR Imaging Correlation of the Elbow.

This article covers the use of radiographs and MR imaging for diagnosing elbow disorders. It concentrates on these techniques, but other imaging techniques including computed tomography, ultrasound, and nuclear medicine are discussed when clinically important. The article covers the use of imaging for specific symptoms including lateral, medial, anterior, posterior and generalized elbow pain, focal swelling, restriction of movement, locking, and neurologic symptoms. Radiographs have been the mainstay of initial imaging of the elbow, while ultrasound examination is often used for soft tissue disease. MR imaging has the advantage over radiographs and ultrasound in accurately examining bone and soft tissue together.

Image guided injection therapies in athletes-Do they work and what should we be using?

In the modern management of the injured elite athlete, the goals of guided injection therapies have extended beyond simple reduction of pain to enhancement of tissue healing and accelerated return to competition, faster than natural healing can allow. This article will review the injection therapies which are frequently used in elite sports injury management and describe other less commonly used injection therapies that are available to the treating clinician and athlete. The evidence base, where available, for each treatment option will be summarised.

The use of ultrasound in athletes.

Ultrasound is being used by sports physicians in their daily practice to problem solve, but there is still a reluctance for some radiologists to embrace this technique. It has become the "stethoscope" of the sports physician as it is freely available to have in the office setting (Tok, et al. [1]). This has been made possible by advances in technology making it cheaper and more affordable. In the United Kingdom, ultrasound has been performed by sports physicians, rheumatologists, surgeons, physiotherapists, podiatrists, anaesthetists, neurologists and emergency care physicians. It has become a core area of the curriculum in some of these specialties. In athletes it not only provides confirmation of the diagnosis but leads to a better treatment algorithm and can be used to direct intervention. Radiologists need to be aware of its strengths and weaknesses even if they are not able to perform such examinations.

The diagnosis and management of shoulder pain.

Diagnosis is crucial in decision-making when treating a patient with shoulder pain. Ultrasound is also very important in the diagnostic and therapeutic pathway, especially when surgery is being considered. This article outlines the diagnostic pathway using the patient's history, physical examination and ultrasound examination. It is important to correlate the clinical assessment with the imaging signs. It is also important to treat the patient and not the images as there may be abnormalities detected on imaging that are not symptomatic. The article covers the important diagnosis of subdeltoid subacromial bursitis, glenohumeral joint capsulitis, calcific tendinosis, acromioclavicular joint osteoarthritis and long head of biceps tendinosis. It will guide the reader in how to use the findings to treat, using ultrasound-guided injection and other techniques, including steroid injections, hydrodilatation, barbotage and extracorporeal shockwave treatment. These are discussed with the knowledge from over 30 years of experience with a literature review evidential support. I have included tips to make these procedures more effective in treatment and final outcome. There is discussion regarding the use of steroid injections in the presence of a rotator cuff tear and how to proceed if the patient has more than one disease process. The sensible use of steroids and local anesthetics are included, bearing in mind that lidocaine and high concentrations of long-acting local anesthetics are chondrotoxic and should not be injected into joints.

Ultrasound-guided intervention in the ankle and foot.

In this comprehensive review, we discuss the main interventions performed in the foot and ankle for Achilles tendinopathy, Morton's neuromas and Plantar fasciitis as well as techniques for intra-articular and peritendinous injections. We present the different imaging techniques and injectable agents that can be used in clinical practice, trying to help the reader decide the most appropriate way of managing the patient with a problem in the ankle and foot.

Imaging of the carpal tunnel.

Most patients with symptoms related to the carpal tunnel have idiopathic median nerve compression. Imaging has little role in the care of most cases because steroid injection, therapeutic ultrasound, and surgery have established roles. However, cases with atypical presentation, mass lesions, synovitis, or failed carpal tunnel surgery will benefit from imaging. In this article we review the anatomy of the carpal tunnel, the diseases affecting this region, and then discuss the use of conventional radiographs, computed tomography, ultrasound, and magnetic resonance imaging (MRI), outlining the strengths and weaknesses of each method while listing the signs of disease. We conclude that both ultrasound examination and MRI are powerful and often complementary techniques.

Clinical indications for musculoskeletal ultrasound: a Delphi-based consensus paper of the European Society of Musculoskeletal Radiology.

OBJECTIVE: To develop clinical guidelines for musculoskeletal ultrasound (MSKUS) referral in Europe. METHODS: Sixteen musculoskeletal radiologists from seven European countries participated in a consensus-based interactive process (Delphi method) using consecutive questionnaires and consensus procedure meetings at several European radiology meetings. The evaluation of musculoskeletal diseases was established by literature reviews, followed by consensus on clinical utility in three consensus meetings. This involved a thorough, transparent, iterative approach which including interview, questionnaire, Delphi and standard setting methodologies. European MSK radiologists with a special interest in MSKUS formed two different expert groups who worked on reaching a consensus in the first two meetings. The third meeting resolved questions that did not achieve a consensus level of 67% using the first two questionnaires. RESULTS: On expert consensus, the use of MSKUS is indicated to detect joint synovitis, fluid and septic effusion for potential aspiration, and poorly indicated to detect loose bodies. Recommendations for most appropriate use of musculoskeletal ultrasound are reported in six areas relevant to musculoskeletal ultrasound: hand/wrist, elbow, shoulder, hip, knee and ankle/foot. CONCLUSION: A comprehensive evidence-based, expert consensus-defined educational framework on clinical ultrsound is presented. This should facilitate referrals for this important imaging technique throughout Europe. KEY POINTS: Musculoskeletal ultrasound is indicated for detecting joint synovitis, effusions and fluid collections. • Musculoskeletal ultrasound is poor at detecting loose bodies. • Musculoskeletal ultrasound is relevant for most joints.

Dark t1 bone marrow.

Bone marrow contains fat and water. Using magnetic resonance (MR) T1-weighted images, fat appears light gray and water appears dark gray. Black or low signal structures include normal cortical bone, bone islands, hemosiderin deposits, calcification, ossification, metal artifact, gas, and foreign material. Reactivation of bone marrow reduces the signal of fatty marrow. Additional sequences and supplementary imaging with conventional radiographs and computed tomography are often helpful in determining the nature of the low signal lesions. Genetic bone disorders such as melorheostosis and other syndromes may give low signal lesion in a typical and often diagnostic pattern. MRI is an important method of showing the fracture line as a low signal lesion on T1-weighted images and is the preferred imaging method when conventional radiographs are unhelpful and fracture is suspected. Infection will cause edema and later sclerosis and necrosis with a mixed low and high signal pattern. Infarction will cause a mixed pattern depending on the stage of the process, but this includes low signal on T1-weighted images. Ossification and calcification in primary and secondary tumors appear as low signal areas on T1-weighted images. Recognition and understanding of lesions that cause low signal on T1-weighted images is an important tool when interpreting MR images.

Magnetic resonance imaging, ultrasound and real-time ultrasound elastography of the thigh muscles in congenital muscle dystrophy.

Congenital muscle dystrophy includes a range of genetic disorders characterized by muscle weakness and contractures. We report the magnetic resonance (MR), ultrasound (US) and real-time sonoelastography (RTE) imaging findings of the thigh muscles of a 15-year-old boy with Bethlem myopathy diagnosed with clinical, electromyographic and histopathological criteria. Ultrasound and MR showed hyperechoic appearance and high signal intensity on T1- and T2-weighted sequences respectively at the periphery of the vastus lateralis and the long head of the biceps femoris muscles, and at a central area within the rectus femoris muscles. RTE was employed to examine the elastic properties of the muscle. The elastograms were presented as colour-coded maps superimposed on the B-mode images and revealed that the elastographic pattern correlated with the MR and US pattern of involvement. The abnormal muscle areas were stiffer (blue) than the normal-appearing areas (green), a finding that probably correlates with the presence of dystrophic collagen at the affected areas. This report suggests that RTE could be used as an additional imaging tool to evaluate the pattern of muscle changes in congenital myopathy. Further studies are needed to investigate the specificity and clinical value of RTE in the diagnosis and monitoring of neuromuscular disease.

The value of physical tests for subacromial impingement syndrome: a study of diagnostic accuracy.

OBJECTIVE: To determine the diagnostic accuracy of commonly used physical tests for subacromial impingement syndrome, using ultrasound as the reference standard. DESIGN: A cross-sectional study of 59 participants with chronic shoulder pain of more than four months duration with a referral for diagnostic ultrasound scanning were invited to participate in the study. MAIN MEASURES: Thirty-four participants met the inclusion criteria and had an ultrasound scan followed immediately by application of the following tests: Neer's sign, Hawkins and Kennedy test, painful arc of abduction, empty and full can tests, resisted isometric shoulder abduction and resisted isometric shoulder external rotation. Using the two-way contingency table method sensitivity, specificity, likelihood ratios and overall accuracy were calculated for each physical test. RESULTS: Diagnostic values for each test varied considerably. The Hawkins and Kennedy test was the most accurate test for diagnosing any degree of subacromial impingement syndrome (71.0%). The most accurate tests for diagnosing subcategories of impingement were pain on resisted external rotation and weakness during the full can test (63.6%) for presence of subdeltoid fluid, pain on resisted external rotation (58.8%) for partial thickness tears and the painful arc test (62.1%) for full thickness tears. CONCLUSIONS: As the predictive values of these tests are shown to be variable in this study it indicates that the clinical tests identified have limited use in informing diagnosis. Emphasis on the management of dysfunction may be more appropriate rather than reliance on clinical tests with inconclusive sensitivity and specificity if ultrasound scanning is not available.

High-resolution ultrasound in the diagnosis of upper limb disorders: a tertiary referral centre experience.

The purpose of this study is to determine the reliability of high-resolution ultrasound (HRUS) in the diagnosis of upper limb disorders compared with the initial clinical opinion. We prospectively studied 178 patients referred for HRUS examination (47.2% hand, 34.8% wrist, and 18% elbow examinations) by recording the clinical opinion, the specific ultrasound diagnosis, and the final diagnosis, as established by surgery (79.9%) or follow-up (20.1%). HRUS examination was highly reliable in diagnosing cystic lesions, synovial disease, ligament injury and foreign bodies (100%), and slightly less reliable for solid lesions (82.1%) and nerve, bone, and tendon disorders (97%, 91.7%, 86.5%, respectively). HRUS examination resulted in significantly more correct diagnoses (92.1%) than the clinical opinion (70.8%) (McNemar test, P = 0.001). The agreement between the HRUS diagnosis and the clinical opinion was slight (Kappa test, k = 0.16). HRUS examination is more reliable than clinical examination in diagnosing upper limb disorders.

Shoulder ultrasound imaging-integrating anatomy, biomechanics and disease processes.

This article brings together the anatomy, biomechanics and the imaging of shoulder disease using ultrasound to enable a better understanding of the strengths and weaknesses of ultrasound when imaging the shoulder.

Ultrasound in sports medicine--a critical evaluation.

This article will discuss the aspects of sports medicine where ultrasound imaging has advantages when compared to MRI looking at the strengths and weaknesses of ultrasound in the context of diagnosis and management. It will also assess the use of ultrasound in therapy including guided injections and current thoughts on novel forms of treatment. We will particularly emphasise the role of ultrasound imaging in the management of injuries of tendon, ligament and muscle.