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2、lequipment Characteristics of digital X-ray imaging devices Part 1: Determination of the detectivequantum efficiency ( . . 1. ). - . (IDT). 62220-120066 -, - . () . , - - C, 2013 -, II IEC 62220-120111 .12 13 24 .34.1 34.2 .34.3 .34.4 -44.5 .54.6 .64.6.1 64.6.2 74.6.3 84.6.4 .84.6.5 84.6.6 -.95 96 1
3、06.1 DQE(u,v)106.2 , 106.3 106.3.1 106.3.2 (NPS) 116.3.3 (MTF)137 138 15() 16() 18() .20() - 2122III IEC 62220-12011 IEC 62220-1:2003 . 1: .IV IEC 62220-12011 1 Medical electrical equipment. Characteristics of digital X-ray imaging devices.Part 1. Determination of the detective quantum efficiency1 (
4、DQE) , - . , . , : (R ), , , - , . :- , - ;- ;- , () ;- ( , - , . .). , , , (, - , , . .). , , , IEC ISO.2 :ISO 12232:19981)Photography Electronic still-picture cameras Determination of ISO speed(. . ISO)1) ISO 12232:2006.1 IEC 62220-12011 20130101ISO 12233:2000 Photography. Electronic still-picture
5、 cameras. Resolution measurements (-. . )ISO 15529:1999 Optics and optical instruments Optical transfer function Principles ofmeasurement of modulation transfer function (MTF) of sampled imaging systems ( -. . )IEC 60336:19931)X-ray tubes assemblies for medical diagnosis; characteristics of focal sp
6、ots (- . )IEC 60601-2-7:1998 Medical electrical equipment Part 2-7: Particular requirements for the safety ofhigh-voltage generators of diagnostic X-ray generators ( . 2-7. )IEC 60788:1984 Medical radiology Terminology ( . )IEC 61267:19942)Medical diagnostic X-ray equipment Radiation conditions for
7、use in thedetermination of characteristics ( . )3 :3.1 : , - .3.2 : - ( DN ), , - Q . 1 Q ( ) SNRin2, 2. 2 . 3 , , - .3.3 DQE(u,v). , - (NPS); ( ), , , ,. , .3.4 : , - ( , -), .3.5 : , , , , ,.3.6 : , - () .3.7 : .1) IEC 60336:2005.2) IEC 61267:2006.2 IEC 62220-120113.8 : , . .3.9 MTF(u,v): ( ) - ,
8、u v.3.10 : .3.11 (NPS)W(u,v): - . , , . - .3.12 (DN): , .3.13 Q: .3.14 : (), - - - -.3.15 uv. , - . , .4 4.1 - -. -. - , , , . , - , .4.2 , , (. IEC 60601-2-7). , , 4. (. IEC 60336) 1,2 . . - ( 2) 5 %. 1 , - ISO 1. 2 , , - .4.3 , IEC 61267 (. 1 ). - , RQA 5. IEC 61267.3 IEC 62220-12011 1 IEC 61267 - , ( - 1). 2 , - . 3 - , RQA 9. . 1 (. IEC 61267)
