Shoulder ultrasound detects tears and tendinopathy of the rotator cuff and biceps tendons, calcific deposits, subacromial‑subdeltoid bursitis, joint effusion and synovitis. It shows muscle or tendon tears (partial/full), tendon calcification, cysts and cortical irregularities, and can assess dynamic impingement and guide injections. It is less reliable for deep intra‑articular structures like the glenoid labrum and complex bone fractures.

A high-resolution ultrasound uses high-frequency sound waves (typically 7–18 MHz) and specialized transducers to produce very detailed, real-time images of superficial structures—skin, thyroid, breast, testes, tendons, and blood vessels. It’s non-invasive, uses no ionizing radiation, improves visualization of small lesions and anatomy, and commonly guides biopsies or interventions. Higher frequency gives better detail but less depth penetration.

A diagnostic shoulder ultrasound typically costs: in the US about $200–$800 (higher in hospitals, lower at outpatient clinics); in the UK it's free on the NHS for eligible patients, private scans cost roughly £80–£250; in India roughly ₹500–₹3,000 depending on city and clinic. Final price depends on facility type, operator expertise, and whether Doppler or additional views are needed.

High signal on a shoulder MRI means an area appears brighter than surrounding tissue. On fluid-sensitive sequences (T2/STIR), it usually indicates fluid, inflammation, edema, partial or full-thickness tendon tears, or bone marrow contusion. On T1-weighted images, high signal often reflects fat or blood. Interpretation depends on the MRI sequence and clinical context; radiologist correlation is essential.

For shoulder pain, start with plain X‑rays to check bones and arthritis. For suspected soft‑tissue injury (rotator cuff, tendons, labrum), MRI is most informative; MR arthrography is preferred for labral/intra‑articular problems. Ultrasound is a good, quicker, cheaper option for rotator cuff tears when operator‑experienced. CT is reserved for complex fractures or surgical planning.

Yes — shoulder ultrasound can detect many features of arthritis, such as joint effusion, synovial thickening or inflammation, cartilage irregularity and some erosions, and associated rotator-cuff or bursal changes. It’s especially useful for inflammatory arthritis and guiding injections. However, ultrasound is operator-dependent and less sensitive for deep bony changes (joint-space narrowing, osteophytes, subchondral cysts) than X-ray or CT, so complementary imaging is often needed.