Semi-automatic software significantly reduced the measurement time for pre-TAVI aortic root evaluation compared to manual assessment (204 vs 391 seconds, p<0.001) while maintaining excellent agreement.
Observational (n=120)
Blinded to previous measurements
No
Does semi-automatic software measurement provide comparable results and reduce reading time compared to manual measurement in TAVI candidates undergoing pre-procedural CTA?
Semi-automatic software for pre-TAVI CTA evaluation significantly reduces reading time while maintaining excellent agreement with manual measurements for prosthesis sizing.
Absolute Event Rate: 204% vs 391%
p-value: p=<0.001
BACKGROUND: Pre-procedural TAVI planning requires highly sophisticated and time-consuming manual measurements performed by experienced readers. Semi-automatic software may assist with partial automation of assessment of multiple parameters. The aim of this study was to evaluate differences between manual and semi-automatic measurements in terms of agreement and time. METHODS: One hundred and twenty TAVI candidates referred for the retrospectively ECG-gated CTA (2nd and 3rd generation dual source CT) were evaluated. Fully manual and semi-automatic measurements of fourteen aortic root parameters were assessed in the 20% phase of the R-R interval. Reading time was compared using paired samples t-test. Inter-software agreement was calculated using the Intraclass correlation coefficient (ICC) in a 2-way mixed effects model. Differences between manual and semi-automatic measurements were evaluated using Bland-Altman analysis. RESULTS: The time needed for evaluation using semi-automatic assessment (3 min 24 s ± 1 min 7 s) was significantly lower (p<0.001) compared to a fully manual approach (6 min 31 sec ± 1 min 1 sec). Excellent inter-software agreement was found (ICC = 0.93 ± 0.0; range:0.90-0.95). The same prosthesis size from manual and semi-automatic measurements was selected in 92% of cases, when sizing was based on annular area. Prosthesis sizing based on annular short diameter and perimeter agreed in 99% and 96% cases, respectively. CONCLUSION: Use of semi-automatic software in pre-TAVI evaluation results in comparable results in respect of measurements and selected valve prosthesis size, while necessary reading time is significantly lower.
Horehledova et al. (Thu,) conducted a observational in Severe aortic valve stenosis (n=120). Semi-automatic CT measurement software vs. Manual CT measurement was evaluated on Measurement time (seconds) (p=<0.001). Semi-automatic software significantly reduced the measurement time for pre-TAVI aortic root evaluation compared to manual assessment (204 vs 391 seconds, p<0.001) while maintaining excellent agreement.