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The improvement to DXA with DXL is that, for each pixel scanned by DXA, the exact thickness of the measured object is also measured using lasers. The DXL results allow for a more accurate estimation of bone density by using three separate inputs (low and high x-ray energies plus thickness) rather than two for each pixel in the measuring region.
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]
DXA scans can also be used to measure total body composition and fat content with a high degree of accuracy comparable to hydrostatic weighing with a few important caveats. [18] [specify] From the DXA scans, a low resolution "fat shadow" image can also be generated, which gives an overall impression of fat distribution throughout the body. [19]
They address various conditions such as jaw fractures, malocclusions of the teeth, oral cancer, periodontal disease, and unique veterinary conditions like feline odontoclastic resorptive lesions. Additionally, some animals have specialized dental workers like equine dental technicians , who perform routine dental work on horses.
Bone density scans are recommended to monitor the bone mineral density. [17] The bone density scan is known as a dual energy X-ray absorptiometry scan (DEXA or DXA scan). It is a simple test, taking less than 15 minutes to perform.
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).
A panoramic film, able to show a greater field of view, including the heads and necks of the mandibular condyles, the coronoid processes of the mandible, as well as the nasal cavity and the maxillary sinuses. Panoramic X-ray radiography of the teeth of a 64-year-old male shows dental work performed mostly in UK/Europe in last half of 20th century
It is not used for bone imaging, as the image quality is not good enough to make an accurate diagnostic image for fractures, inflammation, etc. It can also be used to measure total body fat, though this is not common. The radiation dose received from DEXA scans is very low, much lower than projection radiography examinations. [citation needed]