Table 3.
Objective analysis of artifact reduction and surrounding tissues at CIED leads. Data is reported as mean ± SD. CI, conventional images; VMI, virtual monoenergetic images; MAR, metal artifact reduction algorithm; VMIMAR, combination of MAR and VMI. Bold indicates significant changes in HU values compared to CI
| Corrected attenuation | Corrected image noise | |||
|---|---|---|---|---|
| Hypodense artifacts | Hyperdense artifacts | Hypodense artifacts | Hyperdense artifacts | |
| CI | − 127.5 ± 77.3 | 51.8 ± 37.7 | 66.5 ± 46.1 | 29.3 ± 24.3 |
| VMI | ||||
| 100 keV | − 128.2 ± 64.9 | 47.6 ± 32.9 | 65.4 ± 41.7 | 30.1 ± 24.4 |
| 140 keV | − 127.2 ± 62.6 | 47.0 ± 35.5 | 64.9 ± 41.8 | 29.3 ± 24.8 |
| 200 keV | − 126.8 ± 61.9 | 46.7 ± 37.0 | 64.7 ± 42.1 | 29.1 ± 25.1 |
| MAR | − 59.7 ± 50.4 | 22.3 ± 30.5 | 23.6 ± 23.2 | 9.3 ± 12.9 |
| VMIMAR | ||||
| 100 keV | − 58.2 ± 39.4 | 19.7 ± 24.6 | 21.2 ± 21.4 | 10.6 ± 10.7 |
| 140 keV | − 57.1 ± 38.0 | 18.8 ± 24.3 | 20.4 ± 22.1 | 10.0 ± 10.1 |
| 200 keV | − 56.5 ± 37.8 | 18.4 ± 24.7 | 20.1 ± 22.4 | 9.7 ± 9.9 |
| p value | ||||
| CI vs. VMI 100–200 keV | > 0.05 | > 0.05 | > 0.05 | > 0.05 |
| CI vs. MAR | < 0.05 | < 0.05 | < 0.05 | < 0.05 |
| CI vs. VMIMAR 100–200 keV | < 0.05 | < 0.05 | < 0.05 | < 0.05 |