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Dual-energy X-ray absorptiometry is the most widely used and most thoroughly studied bone density measurement technology. The DXA scan is typically used to diagnose and follow osteoporosis , as contrasted to the nuclear bone scan , which is sensitive to certain metabolic diseases of bones in which bones are trying to heal from infections ...
A scanner used to measure bone density using dual energy X-ray absorptiometry. Bone density, or bone mineral density, is the amount of bone mineral in bone tissue.The concept is of mass of mineral per volume of bone (relating to density in the physics sense), although clinically it is measured by proxy according to optical density per square centimetre of bone surface upon imaging. [1]
There are over 20 cancer-specific scales such as the FACT-B for breast cancer and FACT-C for colorectal cancer and 27 symptom indexes which are short, 6 or 7 item subscales which focus only on symptoms. 12 treatment-specific measures focus on the quality of life impacts that patients receiving enteral feeding or with neurotoxicity experience ...
Providing symptoms allows the computer to identify the problem and diagnose the user to the best of its ability. [24] [5] Health screening begins by identifying the part of the body where the symptoms are located; the computer cross-references a database for the corresponding disease and presents a diagnosis. [25] Overdiagnosis
Additionally, each BI-RADS category corresponds with a probability of cancer. This fastiduous attention to semantics with BI-RADS allows for standardization of cancer detection across different treatment centers and imaging modalities. [52] After describing the findings, the radiologist provides a final assessment ranging from 0 to 6:
A test which reliably detects the presence of a condition, resulting in a high number of true positives and low number of false negatives, will have a high sensitivity. This is especially important when the consequence of failing to treat the condition is serious and/or the treatment is very effective and has minimal side effects.
It is not projection radiography, as the X-rays are emitted in two narrow beams that are scanned across the patient, 90 degrees from each other. Usually the hip (head of the femur), lower back (lumbar spine), or heel are imaged, and the bone density (amount of calcium) is determined and given a number (a T-score). It is not used for bone ...
The differential diagnosis includes non-neoplastic causes of lymphadenopathy (e.g. cat-scratch fever, Kikuchi disease) and malignancy, i.e. cancer. Microscopic appearance [ edit ]