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measurement of girth of abdomen (automatic) using body impedance measurement

Other Parts Discussed in Thread: AFE4300

The task I got is to measure the girth of the abdomen continuously for a 24 hour period using a suitable method. I have thought to measure the impedance between two points in the abdomen and use the formula.

Roh=Resistance X (Area / Length)

Is this practically feasible?  Are there any better methods to achieve my task?

I am planning to choose the AFE4300 as the front end to achieve my task.  Is this the best approach to achieve my task?