DIGITAL RADIOGRAPHY Dr. Rupak Sethuraman.

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Presentation transcript:

DIGITAL RADIOGRAPHY Dr. Rupak Sethuraman

Specific Learning Objective What is meant by digital What is analog to digital conversion Pixel and its importance Variations that can be done using computers

CONTENTS Introduction Digital / analog Types of digital radiography Equipment Image processing Advantages and disadvantages Applications Future prospects Conclusion

X-rays Subject Differential absorption Image receptor

8th Nov 1895 1987 Dr Frances Mouyens

Definition – A filmless imaging system ; a method of capturing a radiographic image using a sensor , breaking it into electronic pieces and presenting and storing the image using a computer.

ANALOG (CONVENTIONAL FILM) Vs. DIGITAL

QUANTIZATION

TYPES DIGITAL IMAGING DIRECT INDIRECT Storage phosphor imaging (SEMIDIRECT)

EQUIPMENT + + Patient & X-ray machine Sensor Computer = Digital image

DIRECT DIGITAL RADIOGRAPHY CHARGE COUPLED DEVICE

Analog to Digital Converter (ADC) Image readout X-rays Scintillator Fiber optic Semiconductor chip (CCD/CMOS) Image readout Direct data link to the computer

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