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One approach

entails alternating pulses of low-and excessive-voltage electricity implemented to the x-ray tube. The attenuation values of the ensuing low- and excessive-power x-rays are then measured separately. The different approach applies a consistent potential to the x-ray supply at the same time as the usage of a K-edge fi lter to separate the electricity spectrum into  slender power bands. An electricity-discriminating detector with a twin-channel analyzer counts the consequent photons. Ultrasonic bone densitometry structures do now not depend on a radiation source but as an alternative use sound waves to degree the integrity of the appendicular skeleton, generally via the calcaneus or phalanges of the fi ngers. Operating steps This examination is generally executed on an outpatient basis. In the Central DXA examination, the patient lies on a padded desk. An x-ray generator is positioned under the affected person and an imaging tool, or detector, is located above. To verify the spine, the affected person’s legs are supported on a padded box to fl atten the pelvis and lower (lumbar) spine. To determine the hip, the patient’s foot is located in a brace that rotates the hip inward. In each cases, the detector is slowly handed over the area, generating snap shots on a laptop monitor. Reported issues No critical reviews regarding the functioning of DXA scanners. Use and maintenance User(s): Bone densitometry technician Maintenance: Medical workforce; technician; biomedical or clinical engineer Training: Initial education via producer and manuals Environment of use Settings of use: Hospitals, clinical offi ces (central DXA); cell health trucks, drugstores (pDXA) Requirements: Stable electricity supply; defensive for remedy room and control room (important bone densitometers) Product specifi cations Approx. Dimensions (mm): 840 x 737 x 483 Approx. Weight (kg): 181 Consumables: NA Price range (USD): nine,a hundred and eighty – 199,000 Typical product existence time (years): 12 to fifteen Shelf existence (consumables): NA Types and versions Central bone densitometers; peripheral bone densitometers Densitometer, Bone UMDNS GMDN 17152 18382 17747 Densitometers, Bone Densitometers, Bone, Ultrasonic Densitometers, Bone, X-Ray, Dual-Energy Absorptiometry 38314 37661 Bone absorptiometric radionuclide system Bone absorptiometric x-ray gadget, dualenergy Other not unusual names: Absorptiometers, X-Ray, Dual-Energy; Central DXA Systems; DEXA Systems; Diagnostic Bone Absorptiometer; Dual-Energy Densitometers; Dual-Energy X-Ray Absorptiometers; DXA Systems; Peripheral DXA Systems (pDXA); Radionuclide Systems; Ultrasonometers; Absorptiometer, twin-photon; RI bone mineral analyser; Dual-power x-ray absorptiometry (DEXA) gadget

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