1、 IEC 61391-22010Ultrasonics Pulse-echo scanners Part 2: Measurement of maximumdepth of penetration and local dynamic range(IDT) 61391-220121 - - , 42 3 29 2012 . 1453-4 61391-22010 .- . 2. - (IEC 61391-22010 Ultrasonics Pulse-echo scanners Part 2: Measurementof maximum depth of penetration and local
2、 dynamic range). - 1.52012 ( 3.5). - , 5 1.02012 ( 8). ( 1 ) , -. () . , - (gost.ru) , 2013 , - - II 61391-220121 12 13 24 .55 56 56.1 .56.2 56.2.1 56.2.2 .66.2.3 66.3 66.4 87 .97.1 (): 97.1.1 .97.1.2 97.1.3 .107.2 117.2.1 .117.2.2 .127.2.3 II 137.2.4 13 () 15 () - - .16 () .20 21 61391-22012III Sta
3、te system for ensuring the uniformity of measurements. Medical ultrasonic diagnostic equipment. Generalrequirements to methods for measurement of maximum depth of penetration and local dynamic range 201401011 , - - :- ;- ;- ;- ;- ;- , . - . - , 1 15 , , 15 . 15 . - (), - .2 -. 60050-801:1994 801. (I
4、EC 60050-801:1994 International Electrotechnical Vocabulary (IEV) Chapter 801:Acoustics and electroacoustics) 60050-881:1983 881: (IEC 60050-881:1983, International Electrotechnical Vocabulary (IEV) Chapter 881:Radiology and radiological physics) 60601-1:2005 1: - (IEC 60601-1:2005, Medical electric
5、alequipment Part 1: General requirements for basic safety and essential performance) 61161:2006 - (IEC 61161:2006, Ultrasonics Power measurement Radiationforce balances and performance requirements) 61391-1:2006 - 1. - (IEC 61391-1:2006,1 61391-22012Ultrasonics Pulse-echo scanners Part 1: Techniques
6、 for calibrating spatial measurement systems andmeasurement of system point spread function response) 62127-1:2007 1: 40 (IEC 62127-1:2007, Ultrasonics Hydrophones Part 1:Measurements and characterization of medical ultrasonic fields up to 40 MHz)3 :3.1 (A-scan): , , , . 61391-13.2 , (scan line): -,
7、 - . , . 61391-13.3 , (acoustic working frequency): - f1 f2, - 3 .3.4 , 1(attenuation coefficient): - .1 , 1 - 8,686.2 -. c97 (f), . . f, c97 (f)= c970fb, f , c970 1 , b , -, .3 ; - .3.5 - (B-mode): , . ; - - .3.6 (B-scane): , , -, . 61391-13.7 ,11(backscatter coefficient): - , 180 , - , , - ; , - .
8、 , , .3.8 (backscatter contrast): - .3.9 (beam axis): - , 62127-1.2 61391-220123.10 (digitized image data): , , .3.11 , (displayed acoustic dynamicrange): 20lg , , , - , . , -, - , .3.12 ( -) (display threshold (B-mode): , .3.13 ( -) (display saturation (B-mode): , - .3.14 (dynamic range): . (locald
9、ynamic range); . (displayed dynamicrange) (global dynamic range).3.15 ( ) (field-of-view): -, .1 , .2 61391-1 , , - .3.16 (frame rate): , , . 61391-1 , , .3.17 , (gain): , , . 61391-1 - .3.18 (global dynamic range): , -, .3.19 (harmonic imaging): , , . . - .3.20 , (local dynamic range): 20lg - , - , , .1 8- 255.2 -, . 60601-1. , , -, , . , - .3 61391-220123 , -.3.21 , (maximum depth of penetration): - , - - - , , 1,4. .3.22 (operating c
