Table 3 Imaging parameters: source-to-detector distance (SDD), beam nergy (kVp), beam intensity (mAs), additional copper filtration (Cu filter), contrast-to-noise ratio (CNR), mean perceptual image quality (IQ) score, effective dose (ED), and change in ED in comparison with the reference image, highest IQ score image, and sixth lowest ED images (14)
From: Effective dose and image optimisation of lateral lumbar spine radiography: a phantom study
Image | SDD | kVp | mAs | Additional Cu filter (mm Al) | CNR | Mean IQ score ± SD | ED (mSv) | Change in ED (%) |
|---|---|---|---|---|---|---|---|---|
Highest IQ score | 130 | 75 | 18.0 | 0.0 | 7.23 | 0.6 ± 0.41 | 0.0218 | -0.70 |
Highest ED (Ref. image) | 100 | 75 | 18.0 | 0.0 | 7.18 | 0.0 ± 0.0 | 0.0220 | 0.00 |
6th lowest ED | 150 | 95 | 4.5 | 0.1 | 2.99 | -1.7 ± 0.41 | 0.0042 | -80.90 |
5th lowest ED | 150 | 75 | 18.0 | 0.3 | 3.5 | -1.8 ± 0.41 | 0.0041 | -81.50 |
4th lowest ED | 130 | 95 | 4.5 | 0.3 | 2.24 | -1.8 ± 0.41 | 0.0040 | -81.60 |
3rd lowest ED | 150 | 85 | 9.0 | 0.3 | 3.22 | -1.8 ± 0.41 | 0.0036 | -83.60 |
2nd lowest ED | 150 | 95 | 4.5 | 0.2 | 2.56 | -2.0 ± 0.0 | 0.0035 | -85.0 |
Lowest ED (and IQ score) | 150 | 95 | 4.5 | 0.3 | 2.13 | -2.0 ± 0.0 | 0.0029 | -87.0 |