]>Correlation of Hydronephrosis Index to Society of Fetal Urology Hydronephrosis Scale : Figure 3
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Figure 3: Same kidney 1.5 months later. SFU grade IV hydronephrosis; Calculated HI 27. The dotted line outlines the entire renal area, including renal pelvis [black]   and parenchyma (dark gray). While the SFU grade remained the same, the HI has deteriorated significantly, indicating an actual worsening HN.