Non-Contrast CT Radiomics Model Predicts Spontaneous Stone Passage in Acute Ureteric Colic

A random forest model using non-contrast CT radiomics predicted spontaneous stone passage in acute ureteric colic (AUC 0.79, 95% CI 0.68–0.88; n=428, spontaneous passage rate 47.9%). External validation needed.

• Retrospective single-centre study of 428 patients; spontaneous stone passage occurred in 47.9% within 4 weeks.
• Random forest achieved best AUC 0.79, accuracy 0.72, sensitivity 0.69, specificity 0.76 on the validation set.
• External validation is required; adding stone location may improve performance.

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