GB/T 19890-2005 声学 高强度聚焦超声(HIFU)声功率和声场特性的测量

ICS17.140.01

A59霭黔

中华人民共和国国家标准

GB/T19890-2005

声学高强度聚焦超声(HIFU)声功率

和声场特性的测量

Acoustics-Highintensityfocusedultrasound(HIFU)measurementsofacoustic

powerandfieldcharacteristics

2005-09-09发布2006-04-01实施

中华人民共和国国家质量监督检验检疫总局发布

中国国家标准化管理委员会

GB/T19890-2005

目次

前言···············I.-···。，·。‘·········，·，，·····。········，····，，，，，············，，，，，，，…皿

引言···························，，······················，·，，，，，·······‘········，·······，，，，························……N

1范围·······，······································································，，·································，，二1

2规范性引用文件···，············································，···············································……1

3术语和定义··················，·······，········································································……1

4总则·······················，···················································································，……3

5测量系统的要求·····，，······················································································，·，，，，，·4

5.1辐射力天平系统的要求·······················-···············，···，·，··，········‘·······，·，·，，，，，··…4

5.2水听器测量系统的要求··、·，········，···········，······················，······························，··…4

5.3测量水槽的要求··，······，··················································································……5

5.4对水和除气的要求······························································，···················，··…·…7

5.5对被测高强度聚焦系统的要求····························································…·…““““一‘”7

5.6对测量仪器的要求，·，，·························，···························································一·7

6声功率测量方法·，···················】，，，···························，，，，，，。····1】·······……8

6.1辐射力的测量···········，，·······················，·，··········‘·················，，，，························一·8

6.2声功率的计算·····，························································································……8

7声场特性的测量···，········，···············································································……9

7.1测量准备工作···························································，··································……9

7.2水听器的对准···········，，··················································································一·9

7,3测量步骤···················，，···················，，，·，，·························，，····························……10

参考文献·················，，，，，，·························，···························，，·····················一12

GB/T19890-2005

月U舀

本标准由中国科学院提出。

本标准由全国声学标准化技术委员会((SAC/TC17)归口

本标准起草单位:上海交通大学、中国科学院声学研究所、同济大学声学研究所、中国船舶重工集团

公司第七一五研究所、国家武汉医用超声波仪器质量监督检测中心、无锡海鹰电子医疗系统有限公司科

研所、重庆医科大学医学超声工程研究所、北京源德生物医学工程有限公司。

本标准主要起草人:寿文德、夏荣民、黄小唯、朱厚卿、牛凤岐、钱梦绿、王月兵、忙安石、耿晓鸣、

李发琪、于晋生。

GB/T19890-2005

引言

近十几年来，高强度聚焦超声(HIFU)治疗技术在国内外都取得了显著的进步。我国在HIFU的

医学应用和产品制造方面发展很快。有多家企业的相关产品获准进人市场，并已正式用于医学临床。

基础医学、临床医学和产品制造的快速发展，对高强度聚焦超声的基本声学特性测量标准化提出了迫切

的要求。为促进HIFU技术的更好的发展，解决制定产品行业标准的急需，在起草单位多年研究工作

的基础上，制定了本标准。

GB/T19890-2005

声学高强度聚焦超声(HIFU)声功率

和声场特性的测量

范围

本标准规定了0.5MHz-5MHz频率范围内在水中的高强度聚焦超声(HIFU)声功率和声场特

性参数的测量条件和方法。

本标准适用于高强度聚焦超声系统。

注1:本标准使用SI单位。在某些参数说明中，例如声束面积参数和声强参数，使用其他单位可能更方便。例如

声束面积单位可用cm}，声强单位可用W/cm,或kW/-m，,

注2:本标准规定的测量范围:功率不大于500W;声强不大于5000W/cm'

2规范性引用文件

下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件，其随后所有

的修改单(不包括勘误的内容)或修订版均不适用于本标准，然而，鼓励根据本标准达成协议的各方研究

是否可使用这些文件的最新版本。凡是不注日期的引用文件，其最新版本适用于本标准。

GB/T3947-1996声学名词术语

3术语和定义

GB/T3947-1996确定的以及下列术语和定义适用于本标准。

3.1

高强度滚焦超声highintensityfocusedultrasound(HIFU)

用声学、电子学等方法，将超声束会聚到媒质中的狭小区域，形成声强高到足以引起剧烈的物理、化

学、生物等效应的超声波。

3.2

声强度〔]soundintensity,acousticintensity

I

某一时刻，在声场中某点上，与质点速度方向垂直的单位面积上在单位时间内通过的声能称为瞬时

声强。在稳态声场中，声强为瞬时声强在一定时间内的平均值。

注:单位为W/cm},

3.3

声压焦点pressurefocus

整个声场中脉冲声压平方积分最大值所在的位置。在连续波条件下，为声场中声压最大有效值所

在的位置。

3.4

声压焦平面pressurefocalplane

包含声压焦点并垂直于声束轴的平面。

3.5

时间平均声强temporalaverageintensity

I

声场中特定点瞬时声强的时间平均值。除非有特殊规定，取平均的时间为声重复周期的整数倍。

注单位为W/..,.

GB/T19890-2005

3.6

焦域focalregion

聚焦声场中包含焦点并具有下列性质的所有点构成的连续空间:在这些点处，时间平均声强(或声

压有效值平方)大于或等于时间平均声强(或声压有效值平方)最大值的一个指定的百分数。对一3分

贝或一6分贝焦域，指定的百分数分别是50%或25000

3.7

-6dB声束面积内时间平均声强的空间平均值temporalaverageintensityspatiallyaveragedover

the一6dBbeamarea

f.

在自由场条件下，声压焦平面上一6dB声束面积内声功率的空间平均值，即I..,-W-s./A-sdB,

W-d。为一6dB声束面积内通过的声功率，A-eda为声压焦平面内一6dB声束面积。

注:单位为W/_2.

3.8

脉冲平均声强pulse-averageintensity

In+

声场中特定点上瞬时脉冲声强积分与脉冲持续时间的比值。

注单位为W/-,

3.9

空je"J峰值声强spatialpeakintensity

I.,I..

声场中或某一指定平面上时间平均声强的最大值。

注:对H工FU脉冲波，则是指声场中脉冲平均声强的最大值(t=op).

单位为W/,m,o

3.10

峰值负声压peak-negativeacousticpressure

P

峰值舒张声压peak-rarefactionalacousticpressure

P,

声场中或指定平面上，在声重复周期内负瞬时声压绝对值的最大值。

注:单位为Pa·

3.11

一6dB焦域尺寸fullwidthathalf(pressure)maximum

FW月几了

-6dB焦域在垂直于声束轴方向上和声束轴方向上的最大尺寸，即声压焦平面内的最大一6dB声

束宽度和声束轴上的声压一6dB最大长度

注:单位为mma

3.12

最大旁瓣级maximumsidelobelevel

L.,

声压焦平面内声压的第二极极大值(次极大)与主瓣(主极大)声压极大值之比值，用分贝表示。

注:单位为dBo

3.13