GE Medical Systems LUNAR User Manual

g		DOC. ID: DXSE0012
	MANUFACTURING PROCEDURES	REVISION: G
		DATE: 2/28/02
	GE Medical Systems	WRITTEN BY: Jeff Franz
	LUNAR	APPROVED ON CO: L10173

TITLE: DEXA PM Work Instructions

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 nonProdigy, 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.

QUALITY SYSTEM DOCUMENT

Page 1 of 10

It is the responsibility of the user to verify this document originated from the controlled master and is the active revision prior to use.

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	DOC ID: DXSE0012	REV: G	DATE: 2/28/02	CO: L10173
LUNAR

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 [e-mail]

NOTE: This is only to gather statistical information on enCORE based 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 2%

QUALITY SYSTEM DOCUMENT

Page 2 of 10

It is the responsibility of the user to verify this document originated from the controlled master and is the active revision prior to use.

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	DOC ID: DXSE0012	REV: G	DATE: 2/28/02	CO: L10173
LUNAR

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 [e-mail]

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.

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

3.65or 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 [e-mail] or at 866-225-4771.

QUALITY SYSTEM DOCUMENT

Page 3 of 10

It is the responsibility of the user to verify this document originated from the controlled master and is the active revision prior to use.

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.