Qdr 4500 A

• Manufacturer: Hologic, Inc., Bedford, MA

• Skeletal regions studied:

PA spine Proximal femur Forearm Whole body

Supine lateral lumbar spine

PA lumbar spine and proximal femur 10 seconds

Lateral spine 120 seconds

Forearm 30 seconds

Whole body 3 minutes

Lateral imaging with MXA 7.5 s

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

Fig. 13-10. The Hologic QDR® 4500 A. A central fan-array dual energy X-ray absorptiometer. Photo courtesy of Hologic, Inc., Bedford, MA.
Fig. 13-11. The Hologic QDR® 4500 A. The gantry is rotated to perform supine lateral lumbar spine studies. Photograph courtesy of Hologic Inc., Bedford, MA.

PA lumbar 7 mR

Proximal femur 7 mR

Lateral spine 35 mR

Forearm 5 mR

Whole body 1 mR

Lateral imaging with MXA 7 mR

• Dimensions: 79.5 x 41 x 28 in (202 x 104 x 71 cm), 118.9 x 57 in (302 x 145 cm) with C-arm rotated and table extended

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

• Scatter radiation: Less than 1.0 mR/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 LaserJet® B&W printer

• Accessories provided: Anthropomorphic spine phantom

• Options: Magneto optical disk storage; network configurations; body composition analysis software, MXA software, small animal software

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