GB/T 35389-2017Non-destructive testing—X-ray digital radiography—Guide (English PDF)

1 Scope

This standard specifies the X-ray digital imaging detection of technical features, testing equipment, characterization, image resolution, image noise, image

Contrast, image quality, technical application and other basic requirements.

This standard applies to metal materials, non-metallic materials, composite materials and other products X-ray digital imaging detection guidance.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 12604.11 Terminology for non-destructive testing X-ray digital imaging test

Nondestructive testing X - ray digital imaging detection system characteristics

Nondestructive testing - X - ray digital imaging test methods

3 Terms and definitions

GB/T 12604.11 defined terms and definitions apply to this document.

4 symbol

The symbols used in this standard are shown in Table 1.

Table 1 symbols and instructions

Symbol Description a Full width at half maximum of the detector's point spread function in mm

BW Full width at half maximum of point spread function in mm, in mm

Full width at half maximum of point spread function in BW 'imaging plane in mm

CSa contrast sensitivity

CNR contrast to noise ratio

CNRN normalized contrast-to-noise ratio

CNRspN Normalized Contrast-to-Noise Ratio for Specific Micro-Thickness Differences d focus size, in mm

DDA digital detector array

F focal distance to the detector imaging plane, in mm f focus to be seized object surface distance in mm fps The number of image frames the detector outputs per second […]