Expertxl

• Manufacturer: GE Medical Systems, Madison, WI

• Skeletal regions studied:

PA spine

Lateral lumbar spine Proximal femur Forearm and hand Total body Orthopedic hip Vertebral morphometry

PA spine and proximal femur, 6 seconds Forearm/hand 10 seconds Lateral spine 24 seconds Total body 160 seconds Vertebral morphometry 38 seconds

Percent young-adult and percent age-matched comparsions T-score and z-score

Vertebral heights (mm) and vertebral height ratios

Fig. 13-8. The Lunar Expert®-XL. A central fan-array dual energy X-ray absorptiometer. Photograph courtesy of GE Medical Systems, Madison, WI.

PA spine and proximal femur 27 mrem Forearm/hand 12 mrem Lateral spine 190 mrem Total body 5 mrem Morphometry 120 mrem

• Dimensions: 108 x 71 in (2.7 x 1.8 m). Motorized C-arm 140° rotation with 78 in (198 cm) longitudinal travel and 14 in (36 cm) transverse travel

• Recommended dedicated floor space: 12 x 10 ft (3.7 x 3.1 m)

• Operating environmental temperature: 65° to 80° F (18° to 27°C)

• Operating environmental relative humidity: 30 to 75%, noncondensing

• X-ray source: 134 kV, 5 mA for PA spine, proximal femur, lateral spine, and morphometry

• Detectors: Dual energy solid state

• Quality control: Internal hydroxyapatite; automated quality assurance program with spine phantom

• Operation: IBM compatible, Pentium®-based computer; Windows® environment; SVGA monitor; black and white laser printer; hand-held motor controller for C-arm rotation and table elevation

• Accessories provided: Spine phantom

• Options: Color printer; DICOM utilities

Fig. 13-9. The Lunar Prodigy™. A central fan-array dual energy X-ray absorptiometer. Photograph courtesy of GE Medical Systems, Madison, WI.

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