© 2012 CKollmann UltraSound-Lab, MUW Vienna Modul Self-Heating demonstration of a physio-therapeutic transducer

Self-Heating

demonstration of a

physio-therapeutic transducer

and its surface shifts

Acquisition and storage of ultrasound image (video) data

Modul Self-Heating of physio-therapeutic Transducers

Project Vulcanus Christian Kollmann

christian.kollmann@meduniwien.ac.at

Teach [US] Sound a course material developed by the UltraSoundUltraSound--LabLab Center for Center for Medical Physics & Bio-Medical Physics & Bio-medical Engineering medical Engineering Medical University of Vienna (MUW)

© 2012 CKollmann UltraSound-Lab, MUW Vienna Modul Self-Heating demonstration of a physio-therapeutic transducer

Equipment to visualise surface-near transducer self-heating during use resp. along the beam in water.

Demonstration kit Vulcanus

1 LiquidCrystal-Foil Temperature range 40-45°C for Physiotherapy devices 1b Temperature range 19 – 50 °C for diagnostic devices 2 simple thermal test object (H2O) along beam axis for Physiotherapy devices 3 Top part for diagnostic transducer for LC-Foil 4 Web-camera for custom-made Visualheating image processing Soft- ware used on Notebook & Matlab Runtime (storage, evaluation of LC-Foil temperature changes) 5 div. materials and 2. Web-camera, CD with Visual Heating Software (for Win XP, Win7 (32/64 bit) 6 IR-Thermometer

Introduction

Acquisition and storage of ultrasound image (video) data

Modul Self-Heating demonstration of a physio-therapeutic transducer Christian

Kollmann christian.kollmann@meduniwien.ac.at

Teach [US] Sound UltraSoundUltraSound--LabLab Center for Biomedical Center for Biomedical Engineering & PhysicsEngineering & Physics Medical University of Vienna (MUW)

Content

Script (for hands-on session)

Introduction 2

Experiment description

3

© 2012 CKollmann UltraSound-Lab, MUW Vienna Modul Self-Heating demonstration of a physio-therapeutic transducer

Preparation: use plate #1 with LC-foil to demonstrate the heating of a transducer. Fix the plate on a rig and couple the transducer with some gel to the plate on the rear side (see movie). Then setup the physio-therapeutic device (e.g. cw-mode, 1 W/cm2) and wait. Effect: Depending on the acoustical power the temperature will increase inside the transducer and the LC-foil will change its colour when it is heated. Alternatively you can use an IR-thermometer instead (#6). The movie is demonstrating this experiment.

Experiment : Self-Heating of physio-therapeutic transducer

© 2012 CKollmann UltraSound-Lab, MUW Vienna Modul Self-Heating demonstration of a physio-therapeutic transducer

Center for Medical Physics & Biomedical Engineering

c/o General Hospital Vienna, E4L, Waehringer Guertel 18-20

A – 1090 Vienna

Telefon: + 43 (0)1 40400-73730 Fax: + 43 (0)1 40400-3988

christian.kollmann@meduniwien.a

c.at

TEACH [US] SOUND T [U] S

ULTRASOUND-LAB, MUW VIENNA

Modul Self-Heating demonstration of a physio-therapeutic transducer

www.meduniwien.ac.at/zmpbmt/

Teach [US] Sound are modular lecture & training courses developed and offered by the UltraSound-Lab, MUW Vienna These courses are designed to enhance special ultrasound knowledge for physicians, medical physicists, biomedical engineers, students, sonographers, technical medical personell, ... these courses are offered: Modul B-Mode (Performance tests: theory & hands-on) Modul Doppler (Performance tests: theory & hands-on) Modul Safety, Output & Bioeffects (theory & hands-on) Modul Optimazation („optimize your scan / settings“) Modul Self-Heating demonstration Modul M-Mode demonstration

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