Critical Exam and Commissioning

Question 1

Critical Exam Specific tests

Answer 1

Test integrated safety features
HVL/Filtration Checks
Leakage
AEC Backup timer / Cut off (if applicable)

Question 2

Commissioning Checks fluoro

Answer 2

Leakage (from critical)
HVL (from critical)
Focal spot
DAP calibration (at multiple field sizes and kV)
Distortion check (mesh) for II
Fluoro patient doserate baselines

Obtain base lines for all other checks

Question 3

Who is responsible for a critical exam ?

Answer 3

The installer (can delegate responsibility)

Question 4

Who is responsible for acceptance testing?

Answer 4

The purchaser

Question 5

Mammo comissioning only checks

Answer 5

HVL (from crit)
Leakage (from crit)
Determination of the grid factor (to help set imaging factors)
AEC Backup timer / Cut off (from crit)
Field size and dead pixel check
Paddle transmission factor
TORMAM/TORMAX to establish baseline for User QA
Obtain base lines for all other checks

Question 6

Standard X-ray commissioning

Answer 6

leakage
hvl
focal spot
Obtain base lines for all other checks
AEC checks

Question 7

CT commissioning

Answer 7

Couch movement accuracy
Beam filtration (HVL) using scout
Leakage
Calibration (integrated dose monitor vs chamber/detector with traceable calc)
CTDI Comparison with console (using PMMA)
Image noise (catphan) baseline for daily