Question

Describe the principle components and differences of a computed radiography unit (CR) and a digital radiography unit (DR), address stationary and portable units.

Answer 1

CR is the abbreviation for Computed Radiography. It is the use of a Phosphor Imaging Plate to create a digital image that is the CR process. CR uses a cassette-based system like analogue film. As the CR is an older technology, it is right to say that it is cost effective as well. However, this technology needs a lot of assistance in order to proceed a diagnostic image properly.

Digital Radiography, DR in the short term is the latest technology in radiography. The DR technology transfer automatically the images to a computer. So you can quickly evaluate and propose a diagnosis. As it is a recent advancement, it is, of course, slightly expensive compared to Computed Radiography but with a lot of advantages.

To facilitate the analysis of the differences and the pros and cons of both technologies we have made a simple guide who we hope will help you comprehend the difference between both systems and give you a clearer idea of what would be ideal for your clinic.

Pros:

CR

• Low initial investment
• Compatible with a wide range of traditional systems
• Effective for smaller or low volume clinics
• Multiple sizes allow for greater flexibility

DR

• Faster image acquisition
• Better quality images
• High volume capacity
• Greater dose efficiency (for CsI panels)

Cons:

CR

• Long time to view image
• Risk of overexposure
• High Maintenance

DR

• More expensive initial costs
• Less flexibility
• Requires protection from dropping or mishandling