The Finding Site is the location at which the measurement was taken. While some measurements will be an observation of the structure of the finding site itself, other measurements will be an observation of something like flow, in which case the Finding Site is simply the location, not the actual thing being observed/measured. To clarify this distinction, Finding Observation Type was introduced in TID 5302 “Post-coordinated Echo Measurement” . For example, when the measurement is a peak velocity and the Finding Site is a valve, to distinguish between a measurement of the velocity of the blood through the valve, and a measurement of the velocity of the valve tissue, the Finding Observation Type would be set to "Hemodynamic Measurement" or "Behavior of Finding Site" respectively.