Table 1.
Results of the Standard NEMA measurements and Head Equivalent measurements
| Fluoroscopy | DA | DSA | |||||
|---|---|---|---|---|---|---|---|
| Std | Head Eq. | Std | Head Eq | Std | Head Eq. | ||
| Static features | Bar pattern | 2.8 | 3.1 | 3.1 | 3.1 | 3.1 | 3.1 |
| Iodine C-d target 1 | 6/8 | 8/8 | 8/8 | 8/8 | 8/8 | 8/8 | |
| Iodine C-d target 2 | 6/8 | 6/8 | 6/8 | 6/8 | 8/8 | 8/8 | |
| Iodine C-d target 3 | 0/8 | 0/8 | 0/8 | 0/8 | 4/8 | 2/8 | |
| Iodine C-d target 4 | 0/8 | 0/8 | 0/8 | 0/8 | 0/8 | 0/8 | |
| Air cylinders + air Pins | 2/4 | 3/4 | 2/4 | 3/4 | 1/4 | 0/4 | |
| Al cylinders + Pb Pins | 4/4 | 4/4 | 4/4 | 4/4 | 4/4 | 4/4 | |
|
| |||||||
| X-ray parameters | kVp | 80 | 80 | 73 | 74 | 80 | 96 |
| Tube Current (mA) | 32 | 37 | 269 | 342 | 160 | 125 | |
| Frame Exposure (ms) | 9.3 | 7.4 | 5.1 | 4.1 | 71.1 | 50 | |
| EEphantom (mR/frame) | .988 | 0.760 | 14.12 | 10.28 | 97.2 | 74.4 | |
| EEDetector (mR/frame) | 0.011 | 0.033 | 0.136 | 0.231 | 1.15 | 2.28 | |
|
| |||||||
| Moving features | Moving wires | 2/5 | 4/5 | 4/5 | 5/5 | 4/5 | 5/5 |
| Temporal Filtering | 4 | 4 | None | None | None | None | |
|
| |||||||
| X-ray parameters | kVp | 80 | 80 | 73 | 80 | 93 | 94 |
| Tube Current (mA) | 28 | 29 | 231 | 200 | 320 | 320 | |
| Frame Exposure (ms) | 5.6 | 4.5 | 4.1 | 5.9 | 16 | 14.3 | |
| EEphantom (mR/frame) | .435 | 0.615 | 7.88 | 7.47 | 45 | 60 | |
| EEDetector (mR/frame) | .012 | 0.028 | 0.098 | 0.191 | 1.456 | 2.24 | |