71210 Bioelectromagnetism - Exercises Autumn 2004

Impedance Tomography

1. Impedance tomography aims to
   1. feed as much current to the thorax as possible
   2. reconstruct impedance distribution of an imaging plane
   3. find out the internal source distribution of the imaging plane
2. Back-projection method has been used in IT. The problem in that is that
   1. current does not flow in 2-D, nor in a straight line in the thorax
   2. there are no internal sources in the thorax
   3. reconstruction algorithms are computationally demanding
3. Considering human body linear in single frequency impedance measurement, it is possible to swap voltage/current injection sites without changes in the information content of the signal
   1. True
   2. False
4. Because of the case in the previous question the number of independent impedance measurements is ________________
   1. decreased to one half
   2. increased to double
   3. increased to double

Show correct answers

Back to exercises page