BSI PD IEC TS 63070:2019
$142.49
Ultrasonics. Field characterization. Infrared imaging techniques for determining temperature elevation in tissue-mimicking material and at the radiation surface of a transducer in still air
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 30 |
This document is applicable to ultrasonic equipment designed for the medical field of application. It covers both diagnostic and therapeutic (physiotherapy and HITU) equipment.
This document describes transducer evaluation by the infrared imaging technique using a split TMM-phantom for qualitative and quantitative estimation of temperature distributions in tissue-mimicking material, resulting from absorption of ultrasound and from heating of the transducer itself.
This document also describes a method to measure transducer-surface temperature, while the transducer is driven under the still-air condition.
NOTE 1 When the transducer is in contact with tissue-mimicking material, the heating of the transducer itself depends on the actual efficiency of the transducer, on the specific conditions for thermal transfer to or from the tissue-mimicking material, and on the transmitting/receiving electronic circuits, such as a switching circuit or pre-amplifier in some cases.
NOTE 2 The test objects specified in this document are for the measurement of temperature rise and not for the determination of thermal index, which is, by definition in IEC 62359:2010 and IEC 62359:2010/AMD1:2017, an algebraic combination of acoustical field quantities and therefore is not a physically measurable quantity.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 4 | CONTENTS |
| 6 | FOREWORD |
| 8 | INTRODUCTION |
| 9 | 1 Scope 2 Normative references |
| 10 | 3 Terms and definitions 4 Symbols and abbreviated terms 5 Methods of use 5.1 General |
| 11 | 5.2 Consideration of perfusion 5.3 Effects of environment 6 IR-camera specifications 6.1 General 6.2 Test 6.3 Calibration |
| 12 | 7 Phantom specification and construction 7.1 Split TMM specifications 7.2 Periodic validation 8 Measurement procedure 8.1 Split TMM setup 8.1.1 General |
| 13 | 8.1.2 Emissivity 8.1.3 Procedure |
| 14 | 8.2 Still-air setup 8.2.1 General 8.2.2 Emissivity 8.2.3 Procedure 9 Uncertainty determination |
| 15 | Annex A (informative) Measurement example using a split TMM setup A.1 General A.2 Measurement setups |
| 16 | Figures Figure A.1 – Concept of measurement |
| 17 | Figure A.2 – Setups for thermal equilibrium and measurement |
| 18 | A.3 Procedures |
| 19 | A.4 Data analysis |
| 20 | A.5 Improved split TMM-phantom Figure A.3 – Analysis of thermal image Table A.1 – Results of measurement |
| 21 | Figure A.4 – Improved split TMM phantom |
| 22 | Annex B (informative) Measurement procedure under the condition of still air B.1 General B.2 Measurement setups B.3 Procedures |
| 23 | Figure B.1 – Example of a measurement setup for the transducer surface-temperaturetest in still air using an infrared camera |
| 24 | Figure B.2 – Flow chart of the transducer surface-temperature testin still air using an infrared camera |
| 25 | Annex C (informative) Guidance on uncertainty determination |
| 27 | Bibliography |
