LORAD AFFINITY Series - Performance Checks; Half-Value Layer

4-32 P/N 9-500-0255
Service Manual
Chapter 4: Calibrations and Performance Checks
Performance Checks
6.0 Performance Checks
This section of the manual contains the performance checks which verify system
performance and compliance, including verification of the x-ray generating system, and
checks for x-ray and leakage.
After servicing the X-ray System, the following checks must be completed.
• Half-Value Layer (Section 6.1)
• Reproducibility and Linearity in Manual Mode (Section 6.2)
• Reproducibility in Auto-Time Mode (Section 6.3)
• Reproducibility in Auto kV Mode (Section 6.4)
• Reproducibility in Auto-Filter Mode (Section 6.5)
The following are standard system performance checks.
• Bucky Device Performance (Section 6.6)
• AEC Limits Performance Check (Section 6.7)
• System Level Functional Check (Section 6.8)
• Optical Density (User’s Preference) Verification (Section 6.9)
The following checks verify that the mammography unit’s shielding meets requirements.
Perform the appropriate check(s) after servicing the Tubehead or the Image Receptor Support
Device.
• Leakage Check - IRSD (Section 6.10)
• Leakage Check - Tubehead (Section 6.11)
6.1 Half-Value Layer
This compliance check verifies the quality of the x-ray beam and ensures that the half-value
layer (HVL) meets the requirements set forth by the FDA, 21CFR, and the recommendations
by the ACR/CDC.
This check requires the use of the following equipment:
• Dosimeter
• Type 1100 aluminum filter pack (99.9% pure)
• Radiation Meter and Probe