Table 2.
Subjective and objective image quality
| Reader 1 | Reader 2 | p-value | |
|---|---|---|---|
| Subjective image quality | |||
| Excellent (Likert 1) | 23 (52.3%) | 16 (36.4%) | 0.92 |
| Good (Likert 2) | 10 (22.7%) | 17 (38.6%) | 0.14 |
| Fair (Likert 3) | 4 (9.1%) | 6 (13.6%) | 0.75 |
| Poor (Likert 4) | 4 (9.1%) | 1 (2.3%) | 0.38 |
| Non-diagnostic (Likert 5) | 3 (6.8%) | 4 (9.1%) | > .99 |
| Overall image quality | 1 [1–2.3] | 2 [1–2.3] | 0.38 |
| Objective image quality | |||
| Stent blooming | |||
| Measured outer diameter (mm) | 3.7 ± 0.7 | 3.8 ± 0.7 | 0.02 |
| Measured inner diameter (mm) | 2.3 ± 0.7 | 2.3 ± 0.6 | 0.52 |
| Blooming estimate (%) | 37.9 ± 9.6 | 40.1 ± 8.9 | 0.03 |
| Stent lumen | |||
| Attenuation proximal lumen (HU) | 480 [409–499] | 468 [396–523] | 0.87 |
| Attenuation distal lumen (HU) | 455 [378–511] | 453 [405–519] | 0.13 |
| Attenuation in-stent lumen (HU) | 518 [466–601] | 496 [425–577] | 0.18 |
| ∆HU in-stent lumen (HU) | 77 [36–106] | 18 [− 1 to 100] | 0.02 |
Data are presented as number and frequencies in parenthesis, mean ± standard deviation, and median and interquartile range in square brackets
Abbreviations: mm millimeter, HU average Hounsfield Units