Pressure gradient:PressDiff:Pt:Region of interest.XXX:Qn:US.doppler
pressure gradient:pressdiff:pt:region of interest.xxx:qn:us.doppler
Pressure gradient:PressDiff:Pt:Region of interest.XXX:Qn:US.doppler
pressure gradient:pressdiff:pt:region of interest.xxx:qn:us.doppler