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Table 1 Summary of the site of the stone and CT signs

From: Restricted diffusion MRI as a functional biomarker for the assessment of acute calcular upper urinary tract obstruction: initial experience

Site of the stone Non-obstructing renal stone CT signs
Proximal Distal Right Left Strands +  +  Strands −  −  No strands or hydronephrosis
6 12 2 3 3 4 11
  1. NB: [+ +] = with hydronephrosis], [− −] = without hydronephrosis]