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Color Doppler ultrasound shows large-caliber interlobar artery and vein. The resistance index of the nutrient artery is 0.50 (vs. approximately 0.80 in other regions of the graft). The venous spectrum reflects markedly pulsatile flow that cannot be found in other interlobar veins. Post-biopsy arteriovenous fistula (arrow); a Doppler shows alternating flow
