Conference paper

Filipík A., Jan J., Jiřík R., Ruiter N., Stotzka R.

FMBE Proceedings, Vol. 11. Prague: IFMBE, Proceedings of the 3rd European Medical & Biological Engineering Conference - EMBEC´05.

Prague, Czech Rep.

2005

4593-4597

1727-1983

Ing. Adam Filipík (FEKT VUT Brno)

filipik_transducer_calibration [file]

The paper presents a method for
computing a frequency- and direction-dependent
radiation function describing the properties of
transducer elements in a transmission ultrasound
computed tomography (USCT) system. Such a
system consists of a water tank equipped with
numerous unfocused ultrasonic transducer elements
arranged on a plane circular perimeter of the tank.
Each element may be used for emitting or receiving
ultrasonic pulse waves that travel through and are
scattered in the volume of the tank. USCT systems,
still in development, are intended primarily for
ultrasonic mammography and seem to be quite
promising for this purpose. The presented method
calculates a common directivity function and
individual sensitivities of all transducer elements (in
both, emitting and receiving modes). The calculation
is based on solving a large set of log-linearized
equations. At the end of this paper, it is shown that
the model can be easily extended to include some
apriori information about the USCT system.