GE Medical Systems LUNAR User Manual

DOC. ID: DXSE0012

MANUFACTURING PROCEDURES

GE Medical Systems

TITLE: DEXA PM Work Instructions

LUNAR

REVISION: G DATE: 2/28/02 WRITTEN BY: Jeff Franz APPROVED ON CO: L10173

PURPOSE

This procedure describes the steps necessary to do a Planned Maintenance Check on a DEXA scanning system at a customer's site, and to assure that the system is operating within GE-LUNAR's specifications and in compliance with applicable Federal and State regulations.

APPLICATION

This procedure applies to all employees performing Planned Maintenance or Site Certification of DPX Series or PRODIGY, and DPX-NT scanning systems.

SAFETY PRECAUTIONS

When power is applied this equipment generates ionizing radiation. Take precautions that no part of your body passes through the x-ray beam when the equipment is energized.

ASSOCIATED MATERIALS

DXAP0008 DPX-Series Installation Test Procedures DXAP2007 Prodigy Hacksaw Test DXAP3002 DPX-NT Installation Test Procedures DXQC0022 Aluminum Spine Phantom Scan Procedure DXQC2022 enCORE software Aluminum Spine Phantom Scan Procedure DXSE0036 OINK Daughter board and Limit Switch Field Replacement Instructions DXSE0038 DEXA PM Quality record

DEFINITIONS

DPX Series scanners are all non- Prodigy, non- DPX-NT/MD+ scanners. enCORE based systems are all PRODIGY and DPX-NT/MD+ scanners. PRODIGY I systems are defined as PRODIGY systems with system numbers 11999 and lower. DPX-NT (A) systems are defined as DPX NT systems with system numbers 71999 and lower.

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This document contains confidential or proprietary information of GE Lunar. Neither the document nor the information therein is to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE Lunar.

GE Medical Systems LUNAR

DOC ID: DXSE0012

REV: G DATE: 2/28/02 CO: L10173

PROCEDURE

A. QA HISTORY AND ERRORLOG.

1. Perform a Quality Assurance test to insure the system is operating. a. Verify that all tests on the QA are passing.

2. DPX Series scanners:

The QA values needed may be found by viewing the QA database (F4 Database options – F2 QA History) and / or in the Daily QA printouts in the Customer’s QA binder.

a. Verify that the Detector has not lost significant resolution by checking that

the high and low energy air counts have not decreased by more than 10% from the date of installation or the date of the last tube head or detector change).

b. Verify that the air ratio has not changed by more than .02. from the date of

installation or last tube head or detector change (calculate from earliest QA or lookup on QA printouts).

3. Systems with enCORE software a. Copy the QA.mdb file to a diskette (Tools / Send Configuration / Select

Error Log and QA Database, make sure compress Files is selected and select Span Multiple Disks if necessary).

b. Select the appropriate drive (3 ½ floppy A: ) insert disk into drive and click

OK.

c. Label with system number and PM, the file may be mailed to Service

Engineering or email file to lunar.support@med.ge.com

NOTE: This is only to gather statistical in formation on enCORE ba sed systems performance, there will be no follow up regarding these QA histories.

4. Analysis of the QA History file a. DPX Series

i. Verify % Spillover is between 6.3 and 9.5

ii. Check the Air Ratio – it cannot deviate more than .02 since the last

detector / tube change

iii. Check the low air counts – a change greater than 10% since the

date of last detector change indicates a failing detector

iv. Check the Large standard Mass – should not deviate more than

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GE Medical Systems LUNAR

DOC ID: DXSE0012

v. If any of the above parameters are failing, call GE-Lunar Customer

Support for help diagnosing the system.

1. To aid in diagnosis, email the QA.MDB file to lunar.sppport@med.ge.com

5. Review the error log(s). b. DPX Series systems print from DOS prompt

i. C:\> ERRDUMP –L –N >PRN

1. See DPX Series CSB Vol 9 for DPX Series Error Log

Interpretation c. enCORE based systems Tools\ Error Log – add to instructions d. Verify that there are no hardware subsystem failures (X-ray, Detector,

Mechanical)

e. Contact Lunar Service Department if any unexplained or unusual errors

are discovered in the error log.

i. Error Log may be faxed to 608-826-7107 to aid in interpretation.

REV: G DATE: 2/28/02 CO: L10173

f. Delete error log for DPX Series (C:\LUNAR> del err_320.bin or C:\LUNAR

del errlog.bin).

g. Start a new error log for enCORE-based systems by clicking on Initialize

Log.

B. HOST PC MAINTENANCE

1. Clean the Printer according to the manufacturer’s instructions a. For Hewlett Packard Printers go to www.hp.com and search the support

pages for the customer’s printer model.

2. DPX series systems: a. From a DOS prompt

i. Delete contents of C:\SCRATCH and C:\PRNTMNGR directories.

ii. Delete all *.CHK files in C:\ directory.

3. Software updates a. DPX Series systems: all DPX-IQ densitometers may be updated to

version 4.7e software free of charge.

b. All other (non-IQ) DPX Series Densitometers should be running version

3.65 or 4.7e (if upgraded to IQ software)

c. If the customer is running a version lower than 4.7e, or 3.65 ask them if

they are interested in this free update, they may get by contacting the GELunar Apps line (USA) or you may order it from GE-Lunar at

lunar.support@med.ge.com

or at 866-225-4771.

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