Image Capture. X-Ray X-Ray Generation Film Can be exposed directly to x-ray, but sensitivity is very low Nitrate – 1910s to 1930s Acetate – 1920s to.

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Presentation transcript:

Image Capture

X-Ray

X-Ray Generation

Film Can be exposed directly to x-ray, but sensitivity is very low Nitrate – 1910s to 1930s Acetate – 1920s to mid 1960s Polyester – mid 1950s to present Topcoat Emulsion Adhesive Base

Intensifying Screens Intensifying Screen Intensifies available x-ray light X-rays

Film PACS Film is the detector and storage…..“The PACS”

Digital Imaging Ultrasound Nuclear Medicine Computed Tomography Magnetic Resonance

Computed Radiography Digital Image Capture

Expose plate Drop into Reader PMT scans plate Converts to Digital Sends to monitor Digital Image Capture - CR

Imaging PlateExcited Phosphor High Energy Low Energy X-ray Energy Digital Image Capture - CR

High Energy Low Energy Laser Scanning Creating Visible Light, Digital Capture Excited Phosphor Digital Image Capture - CR

High Energy Low Energy Bright White Light Excited Phosphor Digital Image Capture - CR

Flat Panel Detector Digital Image Capture

Image Capture - DR Flat Panel Detector Image info captured Converts to Digital Sends to monitor

TFT Array CsI Photodiode X-rays TFT Array GOS Photodiode X-rays Discussion of CsI vs. GOS Csi focuses scintillator light to TFT High Image quality GOs scatters produced light to TFT causing reduced image quality Flat Panel Technology - Cross Section

Technology Review

Flat Panel Technology - Cross Section

Digital Image Capture - Flat Panel 8 Million X-ray Energy High Energy Low Energy

High Energy Low Energy X-ray Energy 8 Million Digital Image Capture - Flat Panel

Digital Radiography Performance

4096 Imaging Performance Digital Receptors

4096 Speed Digital Receptors

Digital Radiography

Image Generation - Today Using 100 yr old technology……Vacuum Tubes Heats a negatively charged metal filament to1000º C Combination of heat and charge releases electrons Strikes a positively charged electrode X-rays created by the energy of the impact

Image Generation - Future Electron Field Emission A myriad of carbon nano-tubes on a platform Compact source of x-rays that can be controlled with great precision, built into an array Each element programmed to fire when required

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