Advanced non-contrasted computed tomography post-processing by CT-Calculometry (CT-CM) outperforms established predictors for the outcome of shock wave lithotripsy

World Journal of Urology
J LangenauerValentin Zumstein

Abstract

To evaluate the predictive value of advanced non-contrasted computed tomography (NCCT) post-processing using novel CT-calculometry (CT-CM) parameters compared to established predictors of success of shock wave lithotripsy (SWL) for urinary calculi. NCCT post-processing was retrospectively performed in 312 patients suffering from upper tract urinary calculi who were treated by SWL. Established predictors such as skin to stone distance, body mass index, stone diameter or mean stone attenuation values were assessed. Precise stone size and shape metrics, 3-D greyscale measurements and homogeneity parameters such as skewness and kurtosis, were analysed using CT-CM. Predictive values for SWL outcome were analysed using logistic regression and receiver operating characteristics (ROC) statistics. Overall success rate (stone disintegration and no re-intervention needed) of SWL was 59% (184 patients). CT-CM metrics mainly outperformed established predictors. According to ROC analyses, stone volume and surface area performed better than established stone diameter, mean 3D attenuation value was a stronger predictor than established mean attenuation value, and parameters skewness and kurtosis performed better than recently emerged variation...Continue Reading

References

Dec 13, 2007·European Urology·Glenn M PremingerUNKNOWN European Association of Urology
Jul 10, 2012·Magnetic Resonance Imaging·Andriy FedorovRon Kikinis
Jun 4, 2014·Nature Communications·Hugo J W L AertsPhilippe Lambin
Sep 8, 2015·European Urology·Christian TürkThomas Knoll
Sep 25, 2015·International Braz J Urol : Official Journal of the Brazilian Society of Urology·Ozgur YaziciKemal Sarica
Aug 26, 2017·Abdominal Radiology·Manoj MannilChristian D Fankhauser
Sep 28, 2017·World Journal of Urology·Valentin ZumsteinMagdalena Müller-Gerbl

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