M5L6 - Indirect DR Detectors

What are CCD and CMOS used for?

Covert light and electrical signal

When are CCD and CMOS used?

In some indirect capture imaging systems

What are the steps of indirect flat panel detection with CCD and CMOS?

• Xray > xray scintillator > light > charge coupled device or CMOS > analog signal > ADC

What do the CCD CMOS replace in the process?

• The photodetector 

describe the process of indirect flat panel detection

xray > scintilator > light emission > photodetector > light converted in to electrons

what is in a scintilator

cesium iodide and gadolinium oxysulfide

what us gadolineum and what are the characteristics?

it is found in the scintillator and in portable DR detectors. this is because they are not as efficeint but much more durable. they are a turbid phosphor

what is cesium iodide?

found in the iodide and is a structured phosphor. it is more efficient but is much more breakable. found in DR detectors. better spatial resolution

difference between photoconductor and photodetector

photodetector is in indirect DR and photoconductor is in direct DR