| Autor: |
Ashraf H, de Hoop B, Shaker SB, Dirksen A, Bach KS, Hansen H, Prokop M, Pedersen JH, Ashraf, H, de Hoop, B, Shaker, S B, Dirksen, A, Bach, K S, Hansen, H, Prokop, M, Pedersen, J H |
| Zdroj: |
European Radiology; Aug2010, Vol. 20 Issue 8, p1878-1885, 8p |
| Abstrakt: |
Objective: We examined the reproducibility of lung nodule volumetry software that offers three different volumetry algorithms.Methods: In a lung cancer screening trial, 188 baseline nodules >5 mm were identified. Including follow-ups, these nodules formed a study-set of 545 nodules. Nodules were independently double read by two readers using commercially available volumetry software. The software offers readers three different analysing algorithms. We compared the inter-observer variability of nodule volumetry when the readers used the same and different algorithms.Results: Both readers were able to correctly segment and measure 72% of nodules. In 80% of these cases, the readers chose the same algorithm. When readers used the same algorithm, exactly the same volume was measured in 50% of readings and a difference of >25% was observed in 4%. When the readers used different algorithms, 83% of measurements showed a difference of >25%.Conclusion: Modern volumetric software failed to correctly segment a high number of screen detected nodules. While choosing a different algorithm can yield better segmentation of a lung nodule, reproducibility of volumetric measurements deteriorates substantially when different algorithms were used. It is crucial even in the same software package to choose identical parameters for follow-up. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink