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Hologic DISCOVERY A - User Manual

Hologic DISCOVERY A
274 pages
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DISCOVERY
QDR
®
Series
FAN BEAM X-RAY BONE DENSITOMETER
TECHNICAL MANUAL
Hologic, Inc.
35 Crosby Drive
Bedford, MA 01730
USA
Phone in US: 800-321-4659
Fax (Domestic): 781-280-0670
Fax (International): 781-280-0671
Document 080-1085
Revision 008

Table of Contents

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Summary

Chapter 3: Installation

3.3 Install the System

Outlines the steps for cabling the system, checking power line voltage, and installing the computer.

3.4 Calibrate and Test the System

Covers essential calibration and testing procedures, including kV peak potential, tube current, belt tension, and motor calibration.

Chapter 4: Alignment and Calibration

4.1 Check Table Alignment

Provides steps to check the table alignment using a measuring tape and assessing key dimensions.

4.2 Align the Table

Details procedures for aligning the table, including adjusting the "A" dimension and T-rail gap.

4.3 C-Arm Parallelism Adjustment

Describes how to adjust the C-Arm's parallelism using a digital level and checking angles.

4.4 X-Ray Beam Alignment

Crucial procedure to align the X-ray beam with the detector array for optimal repeatability.

4.5 Aperture Calibration

Locates exact starting positions of apertures (slits) and their centers in motor steps.

4.6 Motor Calibration

Guides on calibrating motors (AY, AR, TY, TX, TZ) using the SQDRIVER program to set encoder readback and motion limits.

4.9 Filter Drum Encoder Alignment

Describes the procedure to align the filter drum encoder using an oscilloscope and test points.

4.10 Detector Flattening

Procedure to flatten the X-ray beam and find the table's metal edge for each scan mode.

4.11 Lateral Alignment Test (QDR 4500 A and SL)

Verifies lateral alignment of the system using specific models and a phantom.

4.14 Area, BMD, and BMC Calibration

Covers the multi-stage calibration for Area, BMD, and BMC measurements after thickness calibration.

Chapter 5: Remove and Replace Procedures

5.2 Electronics Tray FRUS

Details procedures for removing and replacing FRUs located in the Electronics Tray assembly.

5.3 Table Y FRUs (A, W and Wi Only)

Describes how to remove and replace FRUs associated with the Table Y motion of the Discovery.

5.4 Table X FRUS

Details the removal and replacement of FRUs associated with the Table X motion of the Discovery.

5.5 Table Z FRUs (A and SL only)

Explains how to remove and replace FRUs associated with the Table Z (up and down) motion.

Chapter 6: Fault Isolation

6.4 Power Problems

Provides troubleshooting steps for issues related to dead systems or power failures.

6.5 Motion Problems

Offers suggestions for diagnosing and resolving failures related to table and C-arm movement.

6.11 X-Ray Problems

Lists common X-ray related problems and suggested solutions for troubleshooting.

6.12 X-Ray Alignment Problems

Provides troubleshooting steps when the X-ray beam does not align properly.

Chapter 7: Preventive Maintenance

7.2 Field Service Preventive Maintenance

Lists recommended annual and semi-annual maintenance procedures for trained service personnel.

Chapter 9: Software Tools

9.1 X-Ray Survey

Describes the 32-bit utility for testing X-Ray generation and detection functions.

Section A: Error Messages

Error Message List

Alphabetical list of system error messages, their hardware/software type, locus, and recommended action.

Hologic DISCOVERY A Specifications

General IconGeneral
TypeBone Densitometer
TechnologyDual-energy X-ray Absorptiometry (DXA)
Weight Limit204 kg (450 lbs)
Power Requirements100-240 VAC, 50/60 Hz
ApplicationBone Mineral Density (BMD) assessment
Detector Technologydetector array
Scan ModesWhole Body

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