Dresden 2014 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 34: Imaging
BP 34.4: Vortrag
Donnerstag, 3. April 2014, 10:15–10:30, ZEU 250
Suitability of the echo-time-shift method as laboratory standard for thermal ultrasound dosimetry — •Tina Fuhrmann1, Olga Georg2, Julian Haller2, and Klaus-Vitold Jenderka1 — 1University of Applied Sciences, Merseburg, Germany — 2Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany
Ultrasound therapy is a promising, non-invasive medical application. It is used e.g. for physiotherapy and lithotripsy for the destruction of kidney stones and has high potential for surgical and therapeutic applications like treatment of cancer, bone repair and treatment of stroke with high intensity focused ultrasound (HIFU). To further develop this technique, to ensure a save clinical application and repeatability of the treatment, laboratory dosimetry standards and quality control mechanisms for therapeutic devices are necessary.
Our approach is to measure temperature with a diagnostic ultrasound device by tracing the time-shift in the backscattered signal. This shift is mainly due to the temperature dependence of speed of sound. We evaluated the suitability of this echo-time shift method for laboratory dosimentry and quality control, especially its general suitability, uncertainties and limitations.