Digital DetectorsDigital Detectors Cassette based Image Storage Phosphor Cassette based Image Storage Phosphor

(CR)(CR) Image IntensifierImage Intensifier Scanned ProjectionScanned Projection Direct Digitizing (Full Field)Direct Digitizing (Full Field)

– CCD CameraCCD Camera– Selenium Flat Panel (“Direct” Digital Radiography)Selenium Flat Panel (“Direct” Digital Radiography)– Phosphor Flat Panel (“Indirect” Digital Phosphor Flat Panel (“Indirect” Digital

RadiographyRadiography)) Future Technology Future Technology

Digital DetectorsDigital Detectors Cassette based Image Storage Phosphor Cassette based Image Storage Phosphor

(CR)(CR) Image Intensifier - discussed in Digital FluoroImage Intensifier - discussed in Digital Fluoro Scanned ProjectionScanned Projection Direct Digitizing (Full Field)Direct Digitizing (Full Field)

– CCD CameraCCD Camera– Selenium Flat Panel (“Direct” Digital Radiography)Selenium Flat Panel (“Direct” Digital Radiography)– Phosphor Flat Panel (“Indirect” Digital Phosphor Flat Panel (“Indirect” Digital

RadiographyRadiography)) Future Technology Future Technology

Digital DetectorsDigital Detectors Cassette-Based: Image Storage Phosphor Cassette-Based: Image Storage Phosphor

(CR)(CR) Image IntensifierImage Intensifier Scanned ProjectionScanned Projection Direct Digitizing (Full Field)Direct Digitizing (Full Field)

– CCD CameraCCD Camera– Selenium Flat Panel (“Direct” Digital Selenium Flat Panel (“Direct” Digital

Radiography)Radiography)– Phosphor Flat Panel (“Indirect” Digital Phosphor Flat Panel (“Indirect” Digital

Radiography)Radiography) Future Technology Future Technology

Slot Scanning DRSlot Scanning DR

Digital DetectorsDigital Detectors Cassette-Based: Image Storage Phosphor Cassette-Based: Image Storage Phosphor

(CR)(CR) Image IntensifierImage Intensifier Scanned ProjectionScanned Projection Direct Digitizing (Full Field)Direct Digitizing (Full Field)

– CCD CameraCCD Camera– Selenium Flat Panel (“Direct” Digital Radiography)Selenium Flat Panel (“Direct” Digital Radiography)– Phosphor Flat Panel (“Indirect” Digital Phosphor Flat Panel (“Indirect” Digital

RadiographyRadiography)) Future Technology Future Technology

CCD CamerasCCD Cameras

Light Collection with CameraLight Collection with Camera

Large Area CCD Detectors: TilingLarge Area CCD Detectors: Tiling

Digital DetectorsDigital Detectors Cassette-Based: Image Storage Phosphor Cassette-Based: Image Storage Phosphor

(CR)(CR) Image IntensifierImage Intensifier Scanned ProjectionScanned Projection Direct Digitizing (Full FieldDirect Digitizing (Full Field))

– CCD CameraCCD Camera– Selenium Flat Panel (“Direct” Digital Selenium Flat Panel (“Direct” Digital

Radiog)Radiog)– Phosphor Flat Panel (“Indirect” Digital Phosphor Flat Panel (“Indirect” Digital

RadiographyRadiography))

Future Technology Future Technology

PhotoconductorsPhotoconductors

AmorphouAmorphouss

SeleniumSelenium

PlatePlate

ChargingCharging

SeleniumSelenium

PlatePlate

(Corotron)(Corotron)

Charged Selenium PlateCharged Selenium Plate

Charged Selenium PlateCharged Selenium Plate

Selenium Selenium PlatePlate

DevelopingDeveloping

Absorption Efficiency: Se vs F/SAbsorption Efficiency: Se vs F/S

Electrostatic Selenium ScanElectrostatic Selenium Scan

Drum-Based Selenium SystemDrum-Based Selenium System

Pixel Array in DRPixel Array in DR

DirectRay (Amorphous Selenium)DirectRay (Amorphous Selenium)

Digital DetectorsDigital Detectors Cassette-Based: Image Storage Phosphor (CR)Cassette-Based: Image Storage Phosphor (CR) Image IntensifierImage Intensifier Scanned ProjectionScanned Projection Direct Digitizing (Full FieldDirect Digitizing (Full Field))

– CCD CameraCCD Camera– Selenium Flat Panel (“Direct” Digital Radiography)Selenium Flat Panel (“Direct” Digital Radiography)– Phosphor Flat Panel (“Indirect” Digital Phosphor Flat Panel (“Indirect” Digital

Radiog)Radiog)•Conventional Screen Phosphors (GdOS)Conventional Screen Phosphors (GdOS)•Cesium Iodide “Needle” PhosphorsCesium Iodide “Needle” Phosphors

Future Technology Future Technology

Indirect DRIndirect DR

Digital DetectorsDigital Detectors Cassette-Based: Image Storage Phosphor Cassette-Based: Image Storage Phosphor

(CR)(CR) Image IntensifierImage Intensifier Scanned ProjectionScanned Projection Direct Digitizing (Full Field)Direct Digitizing (Full Field)

– CCD CameraCCD Camera– Selenium Flat Panel (“Direct” Digital Radiography)Selenium Flat Panel (“Direct” Digital Radiography)– Phosphor Flat Panel (“Indirect” Digital Phosphor Flat Panel (“Indirect” Digital

RadiographyRadiography)) Future TechnologyFuture Technology