engleski

Measurement of Brain Tissue Attenuation by the TDS Method

Cavitation Ultrasonic Surgical Aspirator (CUSA) used in neurological resectional surgery is a point source of ultrasound which can cause appearance of high ultrasonic field intensities in the parts which are not in the area where resection is being carried out. Brain tissue attenuation is one of the essential parameters for prediction of sound intensities within cranium. Because of low ultrasonic frequency CUSA operates on and because of small tissue sample, determination of brain tissue attenuation can not be carried out with con-ventional method. Using Time-delay Spectrometry (TDS), with careful selection of the reference medium, its dimensions, the measuring sample dimensions and the display of measurement transducers, brain tissue attenuation is measured at the frequency range CUSA operates on. The result shows that trend of attenuation changes within 1-10 MHz range does not continue at frequencies under 1 MHz.

attenuation; brain; measurement; TDS; ultrasonic

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