What is BS EN 62494-1 - Definition and requirements for general radiography about?
BS EN 62494 is a European standard that discusses the exposure index of digital X-ray imaging systems. BS EN 62494-1 is the first part of a multi-part series that outlines the definitions and requirements for the exposure index of images acquired with digital X-ray imaging systems to assist in radiography.
BS EN 62494-1 applies to digital x-ray imaging systems used in general radiography for producing projection X-ray images for general applications, such as, but not exclusively:
- Computed radiography (CR) systems based on stimulable phosphors
- Flat-panel detector based systems
- Charge-coupled device (CCD) based systems
Note 1: Image intensifier based systems and systems for mammographic or dental applications are not covered in BS EN 62494-1.
Note 2: BS EN 62494-1 defines the exposure index only for images generated with a single irradiation event. images generated from multiple irradiations (e.g., tomosynthetic or dual-energy images, multiple views on a single CR plate) are not covered.
Who is BS EN 62494-1 - Definition and requirements for general radiography for?
BS EN 62494-1 on definition and requirements for general radiography is useful for:
- Manufacturers of digital radiography systems
- Test centres
- Regulatory authorities
Why should you use BS EN 62494-1 - Definition and requirements for general radiography?
The direct connection between the level of detector exposure and optical density is well established in film-screen radiology. This is not the case in digital radiography, where almost always a constant image characteristic is achieved using automatic image processing. Consequently, deviations from the intended exposure.
BS EN 62494-1 guideline assists you with requirements on the creation of original data, requirements for the exposure index, calibration of the exposure index, determination of the calibration function, determination of the inverse calibration function, requirements for the deviation index, determination of the relevant image region and the value of interest for general radiography.
With obedience and compliance to BS EN 62494-1, you can simplify the usage of digital radiography systems and meet all the requirements for the same. Additionally, will assist you in achieving the intended level of image quality for radiography.
