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A bone scan or bone scintigraphy / s ɪ n ˈ t ɪ ɡ r ə f i / is a nuclear medicine imaging technique used to help diagnose and assess different bone diseases. These include cancer of the bone or metastasis, location of bone inflammation and fractures (that may not be visible in traditional X-ray images), and bone infection (osteomyelitis).
The only definitive diagnostic test in the early acute stage is a bone scan, which will show heterotopic ossification 7 – 10 days earlier than an x-ray. The three-phase bone scan may be the most sensitive method of detecting early heterotopic bone formation.
A CT scan, MRI, or 3-phase bone scan may be more effective for early diagnosis. [7] MRI appears to be the most accurate diagnostic test. [8] Tuning forks have been advocated as an inexpensive alternative for identifying the presence of stress fractures. The clinician places a vibrating tuning fork along the shaft of the suspected bone.
Three-phase bone scan is a sensitive modality to detect active plantar fasciitis. Furthermore, a 3-phase bone scan can be used to monitor response to therapy, as demonstrated by decreased uptake after corticosteroid injections. [21]
Generally a triple phase technetium 99 based scan will show increased uptake on all three phases. Gallium scans are 100% sensitive for osteomyelitis but not specific, and may be helpful in patients with metallic prostheses. Combined WBC imaging with marrow studies has 90% accuracy in diagnosing osteomyelitis.
Both types of rehabilitation require three phases in which only the first phase is different. [citation needed] Exercises that can be used for the range of motion phase can include eversion and inversion of the ankle, flexion and extension of the ankle, and a combination of the two motions to create a circular foot motion. Exercises that allow ...
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Initially, there is a marked increase in the rate of bone resorption in localized areas, caused by large and numerous osteoclasts. Radiographs at this phase show lucency in the affected bone. These localized areas of pathological destruction of bone tissue (osteolysis) are seen radiologically as an advancing lytic wedge in long bones or the skull.