All About Digital Radiography in next 10min !

 

Digital radiography (DR) is an advanced form of x-ray inspection, which produces a digital radiographic image instantly on the computer.

Introduction- 

During the past one-two decays, Digital Radiography (DR) overtaking conventional radiography in many industries as well as medical sectors also due to convenience to use and higher quality in general.
 
The future of radiography will be only and only digital in any industries where radiography is needed and then Digital radiography will play a crucial role in the upcoming future.
 

 

Digital Radiography is booming in the industrial sectors as well as medical sectors. various companies are preferring digital radiography instead of conventional radiography.
 
So, here I will discuss all digital radiography, with complete information, from start to end. So, Scroll with me and dwell deep inside the digital radiography.
 
digital radiography

 

What is Digital radiography?

Digital radiography (DR) is an advanced form of x-ray inspection, which produces a digital radiographic image instantly on the computer.

 

Principle of Digital Radiography- 

Radiation is observed or scattered when it passes through the object, if there is any variation in thickness or density in the object, affects the film exposure. Usually, it shows in dark areas if there is any type of variation is observed.

Types of Digital Radiography-

There basically two types of Digital radiography-
  • Computed Radiography(CR)
  • Direct Digital Radiography(DDR)
 

1. Computed Radiography(CR)- 

Computed radiography is the Digital Replacement of Conventional radiography, Where the imaging plate is exposed to gamma rays, then the energy of the gamma rays is stored in the special phosphor layer. then, a Scanner is used to read the latent image produces by the Imaging Plate. Then It is transferred to the Computer screen for evaluating further.  

2. Direct Digital Radiography(DDR)-

Direct Digital Radiography is actually a quick version of computed radiography where no intermediate equipment is needed to obtain the Digital image on the computer screen.
Direct Digital Radiography(DDR) has also its types on the basis of Conversion, Here are they…

Types of Direct Digital Radiography(DDR) based on Conversion method-

  • Direct Conversion-  As the name sounds, direct Conversion Allows to directly convert X-rays or Gamma rays into electrically charge with no intermediate steps.
 
  • Indirect conversion- As the name suggests, This technique uses a scintillator(i.e. re-emit the absorbed energy in the form of light) to convert x-rays to light before conversion to an electrical charge for subsequent readout.
These are some various types of digital radiography, which I discussed above, now I am going to compare Digital Radiography and Conventional Radiography, Where lots of debates happen from time to time in the Radiography Industry.

 

Difference between Digital Radiography and Conventional Radiography-

Here I will compare  Digital radiography and Conventional Radiography side by side.
 

Conventional Radiography-

  • Fixed Contrast- The contrast of the radiograph is fixed in this type of radiography, You can not change film density If needed.
  • Limited View- It gives only a 2D view of a 3D object, you can not zoom in or zoom out or Flip the image If needed.
  • Duplicacy– Conventional Radiography is the best technique to create a duplicate image, If you want to show the clean image without any cavity to the client, You just need to take a shot from the Passed area, and bolllaa, You are good to go.
  • Mobile-friendly– Set up of convention type of Radiography can be mobilized, if an object can not move.

Here is the detailed guide of Convetional Radiography, to give more information about the same.

 

Digital Radiography-

  • Variable Contrast- The contrast of the radiograph can vary, You can adjust the contrast of the radiograph according to your need.
  • Unlimited View-  It gives a very detailed and crisp image of the object and you can also zoom in and zoom or flip according to your needs.
  • Time-Saver- Digital radiography saves an enormous amount of time Because it combines all needed equipment in a single place and can operate at ease with approx single manpower.

      

These are the basic side-by-side comparison of both types of Radiography, Both are suitable at their place Because of mobility in some cases.

 

For Detailed comparison knowledge regarding the same, You can give a watch to this video clip given Below…

 

                                                     

Advantages Digital Radiography- 

There are several benefits of digital radiography, some of which are given below-
1. Enhanced image quality: Digital radiography produces better image quality than conventional radiography. Because more focused radiation is bombarded on the object and digital radiography removes manual mistakes also, that also enhance the image quality at the optimum level.

2. Reduced radiation Dose: The main advantage of this type of radiography is that it greatly reduces radiation exposure because it effectively reduces 75% of the total radiation and ensures radiation safety. 

3. Less Resources-  As you know, Digital radiography uses the automated process, and hence that greatly reduces various resources that are used in conventional radiography.
 
4. Easy to use- Digital radiography is very convenient in terms of uses. It is free from conventional processes like film processing and various measuring actions required in conventional radiography.
 
5. Less Processing Time: As Digital radiography uses electronics processing and that cuts the various processes like processing film, developing, drying film, and other various work that takes too much time in conventional radiography. 
6. Easy Sharing- Time to say goodbye to the Conventional Radiography, Where storing and organizing them was the biggest hurdle. Now Digital Radiography playing a crucial role in terms of storing data of the outcome result. This technique uses a digital medium to store those files, Which provides easy Access as well as protection regarding unauthorized access.  
 
7.Enhanced Quality- Hence, Digital radiography reduces the various manual process like processing films and other manual terms which cause several errors, This leads to the enhanced overall quality of radiography and productivity too. 
 


Disadvantages of digital Radiography-

Here are some Disadvantages of digital radiography stated below-
  • Rigidity and thickness of the sensor
  • Low-resolution images 
  • High system setup cost
  • Finer flaws may be gone undetected
  • skilled and certified Inspector needed

Applications of digital radiography-

Digital radiography uses in various industries and sectors, Here are some applications of DR in various sectors-

  • Detection and classification of pneumoconiosis
  • Clinical application
  • Implantology
  • Density measurement
  • Medical Application
  • Industrial application

History of Digital radiography- 

The First DR system is introduced in 1990 with the CDD slot-Scan system and then further inventions enhance the overall functionality of the DR system.
 
In 1994, the Selenium Drum DR system was introduced. which further enhanced the capacity and quality of the DR system.
 
Here is the list of various DR system development along with their Years-
Year                                    Development
 
1977                                 Digital Subtraction Angiography
 
1980                                 Computed radiography 
 
1987                                 Amorphous Selenium- Based image plates 
 
1990                                 Charge-coupled device(CCD) Slot-Scan direct radiography
 
1994                                 Selenium Drum DR 
 
1995                                 Amorphous silicon- cesium iodide flat-panel Detector
 
1995                                 Selenium-based flat panel detector
 
2001                                 Gadolinium-based portable Flate-plate detector
 
2001                                 Dynamic flat-panel detector 
 

 

Conclusion-

Digital radiography is the new emerging technique in the NDT method, more in the medical and clinical sector. The quick and instant result is the main highlight of Digital radiography.
 
In this article, you got all about Digital radiography, from scratch to end.
 
Hoping, This article gives you some value and stretch your bowl of knowledge a little bit,
 
If so, then share to needy one and help to stretch those one knowledge too.
 
That’s all for now, stay with us to more about NDT, Thanks.

FAQs-

Q. What are the advantages of digital radiography?
Ans. 
  • Faster Processing Time
  • Better Image Quality
  • Demands Less Resources
  • Allows for Higher Quality Care
  • Relatively Easy to Use
  • Quick Image Sharing
  • Easy Image Storage
 
Q. How does direct digital radiography work?
Ans. As the name sounds, direct Conversion Allows to directly convert X-rays or Gamma rays into electrically charge with no intermediate steps.
Q. What are the types of digital radiography?
Ans. 
There are two types of digital radiography-
1. Computed Radiography
2. Direct Radiography

 

Resources- Twi-Global
If you enjoyed, Share the Knowledge

Leave a comment