Study on the Standardizaton of Signal Intensity Scale of Pixel Value in Digital Radiography

Abstract

Objectives: The digital radiography image shows contrast by the difference between pixel values created in accordance with absorbance difference of transmitted X-ray to object. The purpose of this study is to propose the need of standardization of pixel value representation in digital radiography image. Methods/Statistical Analysis: The unprocessed images and processed images are obtained through various types of X-ray equipment and analyzed pixel values. Findings: As the result of pixel value analysis, the unprocessed images represented pixel values in accordance with X-ray signal intensity while processed images represented pixel values in accordance with gray scale. Improvements/Applications: In order to understand the relationship between radiation dose and pixel value in digital radiography image, the pixel value representation which reflects X-ray signal intensity is necessary.