Discovery

• Manufacturer: Hologic, Inc., Bedford, MA

• Technology: Dual energy X-ray absorptiometry

• Skeletal regions studied:

PA lumbar spine, all models Proximal femur, all models Forearm, all models Dual Hip™, all models IVA™, on models C, W, SL, and A CAD/X, on models C, W, SL, and A Whole body, on models Wi, W, and A

• Scan time on models C; and W; (in the 60 Hz scan mode):

PA lumbar spine and proximal femur 30 seconds Forearm 30 seconds

Whole body 6.8 minutes (model W; only)

• Scan time on models C, W, SL, and A (in the 60 Hz scan mode):

PA lumbar spine and proximal femur 10 seconds Forearm 30 seconds Single-energy IVA™ 30 seconds

Whole Body 6.8 minutes (model W); 180 seconds (model A)

Area (cm2)

T-score and z-score

NHANES III reference data for hip

Diagnosis using World Health Organization Criteria

Fracture Risk Assessment

Vertebral Fracture Assessment (with IVA™)

Trend reports for serial monitoring

Models C; and W; PA lumbar spine and proximal femur 0.10 mGy Models C, W, SL, and A PA lumbar spine 0.007 mGy

Fig. 13-5. The Hologic Discovery™. The newest model in the Hologic central, fan-array dual energy X-ray absorptiometer scanner line. Six models are available. Photograph courtesy of Hologic, Inc., Bedford, MA.

Models C, W, SL, and A Proximal femur 0.07 mGy

Models C( and W( Forearm 0.010 mGy

Models C, W, SL, and A Forearm 0.005 mGy

Models Wi and W Whole body 0.015 mGy (model A 0.01 mGy)

Models Wi, W, SL, and A 79.5 x 41 in (2.02 x 1.05 m)

Models Wi and W, table extended 119 x 59 in (3.02 x 1.50 m)

Model SL, table extended, and C-arm rotated 79.5 x 59 in (2.02 x 1.50 m)

Model A, table extended, and C-arm rotated 119 x 59 in (3.02 x 1.50 m)

Control console, all models, 150 lb (68 kg) Models Ci and C 650 lb (295 kg) Models Wi and W 680 lb (310 kg) Models SL and A 800 lb (365 kg)

• Recommended dedicated floor space: 8 x 8 ft (2.4 x 2.4 m) to 8 x 10 ft (2.4 x 3.1m), depending on model

• 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%, non-condensing

• X-ray source: Switched pulse with 140 kVp peak

• Detectors: Multi-element detector array

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

• Operation: IBM-compatible Pentium computer, QDR for Windows® XP Operating systems, HP DeskJet® printer, 17-in monitor, mouse, 56K modem, CD-RW drive

• Options: Magneto optical disk storage; HP LaserJet® B&W printer; 15-in flat panel monitor; modem or network options; IRIS package (includes DICOM, Physician's Report Writer); prosthetic hip software; and depending on model, decubitus lateral BMD, body composition and sub-region analysis software, small animal capability.

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