Standard No.:	GB/T 23901.4-2009
English Name:	Non-destructive testing—Image quality of radiographs—Part 4:Experimental evaluation of image quality values and image quality tables
Chinese Name:	无损检测 射线照相底片像质 第4部分：像质指数和像质表的实验评价
Chinese Classification:	J04    Basic standards and general methods
Professional Classification:	GB    National Standard
Issued by:	AQSIQ; SAC
Issued on:	2009-5-26
Implemented on:	2009-12-1
Status:	superseded
Superseded by:	GB/T 23901.4-2019 Non-destructive testing—Image quality of radiographs—Part 4: Experimental evaluation of image quality values and image quality tables
Superseded on:	2020-1-1
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	120.00
Delivery:	via email in 1~3 business day

GB/T 23901的本部分规定了像质指数和像质表的确定方法。如果本标准第3部分要求的像质计不适用，例如，因为像质计材料的吸收系数与被检材料的吸收系数相差超过30%，则必须做曝光实验以确定可接受的像质指数。由曝光实验取得的像质指数适用于相同透照条件下所有工件的曝光。