Table 5 Semi-quantitative scoring for periprocedural guidance scans according to evaluations of two readers (R1 and R2) considering scanning with standard dose (SD) and low dose (LD).
From: Impact of radiation dose reduction and iterative image reconstruction on CT-guided spine biopsies
Intervention guidance | |||
|---|---|---|---|
LD | SD | p value | |
Overall image quality | |||
R1 | 1 (1–3) | 1 (1–3) | 0.70 |
R2 | 1 (1–4) | 1 (1–3) | 0.99 |
Kappa | 0.82 | 0.85 | |
Overall artifacts | |||
R1 | 1 (1–4) | 1 (1–3) | 0.99 |
R2 | 1 (1–4) | 1 (1–4) | 0.94 |
Kappa | 0.86 | 0.80 | |
Image contrast | |||
R1 | 1 (1–3) | 1 (1–3) | 0.82 |
R2 | 1 (1–3) | 1 (1–3) | 0.44 |
Kappa | 0.76 | 0.72 | |
Determination of target structure | |||
R1 | 1 (1–2) | 1 (1–2) | 0.63 |
R2 | 1 (1–2) | 1 (1–2) | 0.63 |
Kappa | 0.79 | 0.88 | |
Confidence for guidance | |||
R1 | 1 (1–2) | 1 (1–2) | 0.99 |
R2 | 1 (1–2) | 1 (1–3) | 0.25 |
Kappa | 0.85 | 0.59 | |
