Point of care renal ultrasonography for the busy nephrologist: A pictorial review

Figure 2 Commonly used modes in nephrology-oriented point of care ultrasonography. A: B-mode: Grey-scale image of the left kidney; B: Color Doppler mode: Blood flow inside the kidney is indicated by red and blue colors; C: M-mode: Variations in diameter of the inferior vena cava over time at the area of interest (circle); D: Pulsed wave Doppler: Transverse view of the kidney with graphic representation of flow in the renal artery.