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CT Scanner Service Engineer Guide

By MedBazaar Technical Team · Troubleshooting Guide

CT Scanner Service Engineer — Essential Knowledge

### CT Scanner Anatomy

  • **Gantry**: X-ray tube + detector array, rotating components
  • **Slip rings**: Power aur data transfer to rotating parts
  • **X-ray tube**: High voltage electron gun — most failure-prone expensive component
  • **Detectors**: X-ray measurement — solid state (modern) ya xenon gas (older)
  • **DAS**: Data Acquisition System — detector signals digitize karta hai
  • **Reconstruction**: Raw data to images — dedicated hardware/software

    • ### Common Failure Points (Frequency Order)

  • X-ray tube (high failure, very expensive)
  • Slip rings (wear item, regular maintenance)
  • Detector elements (occasional, very expensive)
  • Power supply boards (moderate failure)
  • Cooling system components (Pakistan mein heat issues)
  • Software/computer systems

    • ### Essential Tools

  • High voltage probe (40kV rating minimum)
  • Oscilloscope
  • Manufacturer service laptop with diagnostic software
  • Calibration phantoms
  • Dosimetry equipment
  • Mechanical tools (torque wrenches, etc.)

    • ### Safety Protocols

  • Lockout/tagout procedure strictly follow karein
  • High voltage capacitor discharge verification
  • Radiation monitoring badge pehnen
  • Never work alone on energized equipment
  • PNRA regulations compliance

    • ### Pakistan Market Notes

  • Spare parts availability: GE, Siemens, Philips parts mil jaate hain Karachi/Lahore mein
  • Third party parts: quality verify zaroor karein
  • Local repair vs replacement: cost-benefit analysis carefully karein

    • Difficulty: Advanced Reference

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