| Zugriffsnummer | 25543 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | A thermal technique for local ultrasound intensity measurement: part 1. Sensor concept and prototype calibration |
| Autor(in); Institution |
Wilkens, Volker; 1.6, Schall, PTB-Braunschweig
|
| Quelle/Jahr | Measurement Science and Technology: 21 (2010), 11, 115805-1 - 115805-8 |
| ISSN | 0957-0233 (PRINT) ; 1361-6501 (ONLINE) |
| DOI | |
| URL | |
| Verlag | Bristol: IOP Publishing |
| Klassifikationscode | PACS: 43.80.Qf ; PACS: 43.80.Vj ; PACS: 87.50.yt ; PACS: 87.19.Pp ; PACS: 87.63.-d ; PACS: 87.19.X |
| Freie Schlagworte | exposure measurement ; diagnostic ultrasound ; thermal sensor |
| Zusammenfassung | Acoustic output measurements on medical ultrasound equipment are essential to ensure the quality of diagnosis and therapy and to preserve the safety of the patient. The local temporal-average ultrasound intensity is an important output parameter as it is related to local heat production in the body. Excessive intensities may be potentially harmful in the case of diagnostic ultrasound. On the other hand, very high local intensities are needed in therapeutic applications of ultrasound, for instance for the ablation of tumors. A technique for local ultrasound intensity measurements is described in this paper. In contrast to the common methods using hydrophones, this method is based on the transformation of the ultrasound energy into heat inside an acoustic absorber and the measurement of the resulting temperature increase. The sensor concept is described and a characterization of three manufactured prototypes is given. An accompanying paper describes the application of this measurement technique to the output characterization of a typical diagnostic ultrasound machine. |
