Correction to: J Med Ultrasonics (2017) 44:305–314 DOI 10.1007/s10396-017-0770-0

In the original publication of this paper the legend of Fig. 1 should read as:

Fig. 1 Pulsed Doppler flow velocity recordings of the aorta (a), right renal artery (b), right renal interlobar artery (c), inferior vena cava (d), right renal vein (e), and right renal interlobar vein (f). PSV peak systolic velocity, EDV end-diastolic velocity, V MAX maximum velocity, V MIN minimum velocity

The second sentence under the heading “Pulsed-wave Doppler sonography” should read as:

Pulsed-wave Doppler sonography was performed under the guide of B-mode or color Doppler imaging with simultaneous electrocardiogram recording (Fig. 1).

In the same paragraph the sentence after the first equation should read as:

We then measured the maximum velocity (V MAX) and minimum velocity (V MIN) of the inferior vena cava and the right and left renal and renal interlobar veins during inspiration and expiration, respectively, and calculated the mean value for each vein.