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OPG Machine Calibration Guide

By MedBazaar Technical Team · Troubleshooting Guide

Calibration Overview

OPG calibration radiation output accuracy aur image quality ke liye zaruri hai. Pakistan mein PNRA regulations ke under annual calibration mandatory hai.

Calibration Types

Geometric Calibration

  • Image geometry accurate hai — distortion nahi
  • Reference phantom use hota hai
  • Engineer aur dosimetrist required

    • Exposure Calibration

  • kVp aur mAs accuracy verify karna
  • Ionization chamber measurements
  • Physicist required

    • Image Quality Calibration

  • Contrast, resolution, noise levels
  • Standard test patterns use hote hain

    • Daily QA (User Level)

  • Startup normal hai
  • Patient positioning guides properly aligned
  • Test exposure on phantom (agar available)
  • Image quality baseline se match karti hai

    • Annual Calibration (Mandatory)

    PNRA registered engineer/physicist se karwain. Certificate maintain karein.

    اہم نوٹ

    Uncalibrated OPG se:

  • Patient ko unnecessary radiation dose
  • Diagnostic errors (over/under exposure)
  • Legal/regulatory issues

    • Difficulty: Advanced — Certified Professional Required

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