img crit ch 33 Matching
| ESE readout for cassette spot films in flouro: |
| According to federal law ESE for flouro shall not exceed: |
| 10R per minute (100mGy per min) |
| How much can the tolerance for reproducibility be off? |
| +/- 5% (same as the variance in voltage supply) |
| According to federal law ESE for angiography shall not exceed: |
| 20R per minute (200mGy per min) |
| Allowable variance in tube arc for tomo (greater than 30 degrees): |
| a sequential increase in mAs should produce the same sequential increase in exposure |
| What is the 9 penny test used for? |
| to determine if the alignment between the collimator and bucky is within range. |
| Allowable variance in tube arc for tomo (less than 30 degrees): |
| What filtration is needed for tubes operating at 50 kVp and below? |
| How do we know if the rectifier is at fault for an exposure timer error? |
| there should be 30 dots, half the number of dots always means it’s the rectifier |
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