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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). [1]
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.
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.
The CPT code revisions in 2013 were part of a periodic five-year review of codes. Some psychotherapy codes changed numbers, for example 90806 changed to 90834 for individual psychotherapy of a similar duration. Add-on codes were created for the complexity of communication about procedures.
The "Honda sign" (H-pattern [1]) is a radiologic sign seen in case of sacral insufficiency fracture in bilateral sacral insufficiency fractures on a radioisotope bone scan. [2] It gets its name because the shape observed resembles the logo of the Honda motor company, resembling the alphabet "H".
The use of Level III codes was discontinued on December 31, 2003, in order to adhere to consistent coding standards. [3]: 2 Level III codes were different from the modern CPT Category III codes, which were introduced in 2001 to code emerging technology. [4]
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Effective doses can range from 6 μSv (0.006 mSv) for a 3 MBq chromium-51 EDTA measurement of glomerular filtration rate to 11.2 mSv (11,200 μSv) for an 80 MBq thallium-201 myocardial imaging procedure. The common bone scan with 600 MBq of technetium-99m MDP has an effective dose of approximately 2.9 mSv (2,900 μSv). [24]