Qdr 4500 W

• Manufacturer: Hologic, Inc., Bedford, MA

• Skeletal regions studied:

PA spine Proximal femur Forearm Whole body

PA lumbar spine and proximal femur 15 seconds Forearm 30 seconds Whole body 6.8 minutes

Percent young-adult and percent age-matched comparisons T-score and z-score sBMD (mg/cm2) for L2-L4 and total hip NHANES III total hip comparisons

PA lumbar spine 5 mR Proximal femur 5 mR Forearm 10 mR Whole body 1.5 mR

• Dimensions: 79.5 x 48 x 28 in (202 x 122 x 71 cm), 118.9 x 59 x 28 in (302 x 150 x 71 cm) with table extended

• Recommended dedicated floor space: 8 x 10 ft (2.4 x 3.1 m)

Fig. 13-12. The Norland XR-46™. A central pencil-beam dual energy X-ray absorptiometer. Photograph courtesy of Norland a CooperSurgical Company, Ft. Atkinson, WI.

• Scatter radiation: Less than 1.0 R/hr (0.01 mSv/hr) measured at 6.6 ft (2.0 m) from the examination table for most scan modes

• Operating environmental temperature: 60° to 90° F (15° to 32°C)

• Operating environmental relative humidity: 20 to 80%

• X-ray source: Switched pulse, dual energy

• Detectors: Multi-element detector array

• Quality control: Self-calibrating with patented Hologic Automatic Internal Reference System and automated quality control program

• Operation: IBM-compatible Pentium computer with Windows operating system, 17-in monitor, HP DeskJet® printer

• Accessories provided: Anthropomorphic spine phantom

• Options: Magneto optical disk storage; network configurations; HP LaserJet® B&W printer; body composition analysis software

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