Digital radiography uses a definite number of discontinuous points to create medical images, unlike analogue radiography which uses an indefinite number of continuous points. Digital images allow for storage in large databases, manipulation and processing and easy transfer between locations. This enables capabilities like 3D reconstructions, enhancement of images, and integration with hospital information systems for improved diagnosis, treatment, research and education.

1. Digital Imaging in
Medicine
Digital Radiography, the Basics
F. Jahedi
MD, MS(Medical IT)
May 2010

2. We want to talk about:
At first let’s talk about:

5. • Mathematically is:
Indefinite number of continuous
points that make an image

6. • Mathematically is:
Definite number of
discontinuous points that make
an image

7. • INDEFINITE number of
CONTINUOUS points that make an
image
• DEFINITE number of
DISCONTINUOUS points that make
an image

8. Continuous
Discontinuous
Indefinite
Definite

9. 5
4
3
2
1
55
0
0
0.5
1
1.5
2
44
2.5
33
22
11
00
00
0.5
0.5
11
1.5
1.5
22
2.5
2.5

11. Digital
Analogue

12. Difficult to keep for long time
Difficult to keep related metadata
Impossible to manipulate
Impossible to merge with other images
Limited access and restricted resources
Not easy to transfer to different places synchronously

13. Ability of Storage
Ability to Process
Ability to Transfer

15. Storage
Transfer
Process
Archiving
Communication
Image Processing
PACS
DIP

16. • Volumetric
3D Reconstructions
Metrics
Enhancement
• Brightness
• Contrast
• Colorize
• Coronary CT
Angiography
• Brain CT
Angiography

17. Hardware
SAN / DVD
Robots
Software
Compressions
Storage
Management
CPR
Archiving
Relations
Reports
Data
Management
Work lists
Operational
Follow ups
Retrieval
Data Mining
Research
ANN

18. With HIS
Integration
In OAS
Education
Communication
Collaborations
Research
Teleconsultation
Telematics
Teleradiology

19. Better Diagnosis
Better Treatment
Better Evidences
Better Researches
Better Collaboration
Better Education