Hologic DISCOVERY A, Technical Manual

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7-1
Section 7
PREVENTIVE MAINTENANCE
This section lists the procedures that should be performed by trained service personnel at least
once per year, and preferably at six-month intervals.
7.1 Customer Preventive Maintenance
Hologic requires that the customer run a daily QC scan of the spine phantom supplied with the
Discovery, and add that scan to the QC database. If the CV of the database exceeds 0.8% the
customer is asked to inform Hologic Field Service.
The customer is further advised to perform a weekly backup of the patient database (Backup) and
archive QC scans along with their patient scans.
No other regular maintenance activity is recommended or required of the customer.
7.2 Field Service Preventive Maintenance
Hologic recommends that the following procedures be performed by trained service personnel at
least once per year and preferably at six-month intervals:
[ ] Perform an Archive of all scans and a System Backup.
[ ] Exit QDR without shutdown, then delete all temporary files (.tmp) on the hard drive.
[ ] In the QDR software, run RECONCILE to compact the database.
[ ] Check the QC database for any problems (e.g. drift, etc.).
[ ] Check ERRLOG.DAT and ERROR.LOG
[ ] Check X-ray tube voltage and current as described in the INSTALLATION section of this
manual. With X-rays on acquire screen captures of the X-Ray Survey bar graph screen with
the X-ray beam alignment tool installed and with the alignment tool removed. Print both
screen captures and include with the other paperwork being returned to Hologic.
[ ] Measure scatter, leakage, and patient dose as described in the INSTALLATION section of this
manual.
[ ] Check X-ray beam alignment as described in the ALIGNMENT AND CALIBRATION section
of this manual.
NOTICE
The Discovery system meets applicable FDA radiation performance standards through
its useful and expected life provided no components or parts are removed from the
system and no unauthorized adjustment or unauthorized replacement of certified
components is perform