GE HEALTHCARE
DIRECTION 2307224-100, REVISION 6DISCOVERY LS SYSTEM SERVICE MANUAL
Page 20 Table of Contents
Section 7.2
CT Gantry Field Replaceable Units (FRUs) .................................................. 226
Section 7.3
CT Gantry Replacement Procedures ............................................................ 226
Section 7.4
PET Gantry Field Replaceable Units (FRUs)................................................ 226
Section 7.5
PET Gantry Replacement Procedures.......................................................... 227
7.5.1 PET Gantry Drive Mechanism Replacement (P/N 2290248) ........................................ 227
7.5.2 Gantry Cables or Retractor Replacement..................................................................... 231
7.5.2.1 Replacing the External Retractor or its Cables.............................................. 233
7.5.2.2 Replacing the Internal Retractor or its Cables............................................... 236
7.5.3 Connecting External PET Cables & New CT-PET Cables to New A36-1, A36-2, A37-1
Panels 239
7.5.4 Replacement of the Short Positioning Pin (P/N 2287052) ............................................ 240
Section 7.6
Procedures and Adjustments........................................................................ 241
7.6.1 Removing the Covers for PET Gantry Service Movement............................................ 241
7.6.2 Activating the Driving Mechanism ................................................................................. 241
Chapter 8
System QC, Calibration and Functional Tests ................................................. 243
Section 8.1
System QC....................................................................................................... 243
8.1.1 CT-PET Volumetric Calibration and Quality Control Procedure (VQC) ........................ 243
8.1.1.1 Initial Table Alignment ................................................................................... 243
8.1.1.2 Reset the Software Alignment Parameters ................................................... 244
8.1.1.3 Positioning the VCQ Phantom....................................................................... 244
8.1.1.4 Scanning and Reconstructing the VQC Phantom ......................................... 245
8.1.1.5 VQC Processing and Software Realignment................................................. 248
8.1.1.6 Mechanical Alignment Table ......................................................................... 251
8.1.1.7 Options .......................................................................................................... 252
8.1.2 Table and Gantry Alignment Procedure........................................................................ 252
8.1.2.1 .Aligning the Table......................................................................................... 252
8.1.2.2 Gantry Alignment Prerequisites..................................................................... 253
8.1.2.3 Preparing the Gantry for Adjustment ............................................................. 254
8.1.2.4 Aligning the Gantry ........................................................................................ 256
Chapter 9
Planned Maintenance (PM)................................................................................. 259
Section 9.1
Maintenance of Mechanical Components .................................................... 259
9.1.1 Lubrication of PET Gantry Driving Mechanism ............................................................. 260
9.1.1.1 Overview of Maintenance and Lubrication Procedure................................... 260
9.1.1.2 Quantity and Frequency of Lubrication.......................................................... 260
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