| Zugriffsnummer | 24050 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Measurement of the total acoustic output power of HITU transducers |
| Autor(in); Institution |
Jenderka, Klaus-Vitold; 1.6, Schall, PTB-Braunschweig
Beißner, Klaus; PTB-Braunschweig, retired staff
|
| Quelle/Jahr | 9th International Symposium on Therapeutic Ultrasound (ISTU 2009):(2010), 207 - 211 |
| Schriftenreihe | AIP conference proceedings: 1215 |
| Availability | [CD-ROM] ; file name: 207_1pdf |
| Herausgeber(in) |
Hynynen, Kullervo
|
| ISBN | 978-0-7354-0758-9 (print) ; 978-0-7354-0762-6 (CD-ROM) |
| Verlag | Melville, NY: AIP |
| Konferenzangaben | 9th International Symposium on Therapeutic Ultrasound (ISTU 2009), Aix-en-Provence, 24-26, September, 2009, France |
| Klassifikationscode | PACS: 43.35.yb ; PACS: 87.50.yk ; PACS: 87.50.yt ; PACS: 43.35.+d |
| Freie Schlagworte | ultrasound therapy ; ultrasonic measurement ; ultrasound power ; HITU ; HIFU |
| Zusammenfassung | The majority of High Intensity Therapeutic Ultrasound (HITU) applications use strongly focused ultrasound fields generating very high local intensities in the focal region. The metrology of these high power ultrasound fields is a challenge for the established measurement procedures and devices. This paper describes the results of measurements by means of the radiation force for a total acoustics output power up to 400 W at 1.5 MHz and up to 200 W at 2.45 MHz. For this purpose, a radiation force balance setup was adapted for the determination of large acoustic output powers. For two types of HITU-transducers the relationship between the total acoustic output power and the applied net electrical power was determined at close transducertarget distance. Further, the dependency of the measured electroacoustic radiation conductance on the transducertarget distance was investigated at reduced power levels, considering the appearance of focal anomalies. Concluding a list of the main uncertainty contributions and an estimate of the uncertainty for the used radiation force balance setup is given for measurements at high power levels. |
