signal or with a coded signal the transmitted signals may be emitted at a rate known as the pulse repetition frequency prf the system of fig2 may also include as a non limiting example a pressure device 215 configured to apply a predetermined force or transduce an applied endogenous or exogenous force to a biological tube that will then be sensed by an array when the array is engaged with the biological tube the biological tube may be one of a section of a gastrointestinal tract an artery a vein or any other relevant biological tube more particularly referring to fig3 a receiver circuit 300 may include a receiver element 315 configured to monitor and receive signals and a matching network 317 the received signal may be conditioned with a preamplifier 319 and filtered with an active or passive bandpass or low pass filter 321 the conditioned signal may then be digitized by a digitizer 323 for further analysis if the transmitter 111 121 was driven by a coded signal the digitized signals may be processed with a matched or mismatched filter the received and processed signals may then be provided to a processor 325 to perform desired analysis and calculate one of more mechanical properties of a biological tube coupled to the transmitter 111 121 thus as will be described the mechanical properties may include a variety of different properties and may be formed into a report that is generated by the processor 325 in some configurations the processor 213 of fig2 and the processor 325 of fig3 may be the same processor in particular the signals acquired by the above described systems may be processed.