GB/T 20249-2006 (English Version) PDF

Standard No.: GB/T 20249-2006
Language: Chinese, Available in English version
Release Date: 2006
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 20249-2006

Scope: This standard provides the definition of the emission field characteristics of medical focused ultrasound transducers, and links these definitions with the theoretical description, engineering design and measurement of the emission field of focused ultrasound transducers. This standard gives the defined beam axis collimation method for focused ultrasound energy conversion. This standard applies to focused ultrasound transducers with operating frequencies in the range of 0.5MHz to 40MHz and used for medical clinical treatment and diagnosis. This standard describes how to measure and characterize the transducer's emission field from a design point of view when no prior knowledge of the structural details of a particular device is known. For the radiated ultrasonic field generated by the specified excitation method, the hydrophone is used to measure in the standard test medium (such as water) or a given medium. This standard applies only to media in which the acoustic field characteristics are substantially similar to those in fluids (the effects of shear waves and elastic anisotropy are minimal), including soft tissue and tissue gels. All sound field characteristics that affect its theoretical description, or are important in design, should be included. These definitions are useful in academic communication, system design, and in describing the performance and safety of systems employing these devices.

GB/T 20249-2006 Referenced Document

GB 16846-1997 Requirements for the declaration of the acoustic output of medical diagnostic ultrasonic equipment
IEC 60050-801:1994 International Electrotechnical Vocabulary - Chapter 801: Acoustics and electroacoustics
IEC 61102:1991 Measurement and characterisation of ultrasonic fields using hydrophones in the frequency range 0,5 MHz to 15 MHz
IEC 61689:1996 Ultrasonics - Physiotherapy systems - Performance requirements and methods of measurement in the frequency range 0,5 MHz to 5 MHz

2006 GB/T 20249-2006 Acoustics.Definitions and measurement methods for the transmitted fields of focusing ultrasonic transducers