1 / 25

Computed Radiography Direct

? ?. DR(Digital Radiography)? ?? CR(Computed Radiography) Direct/Indirect Digital Radiography? DR Detectors? DR Image Preprocessing. Digital radiograpy ? ??. ??????? Digital? ? TFT(Thin Film Transistor) ? F P D(Flat Panel Detector) ??? ?? ????. ?? ??. . Digital

andrew
Télécharger la présentation

Computed Radiography Direct

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


    1. Computed Radiography & Direct/Indirect Digital Radiography Dong-kwan, Kim radiation25@hotmail.com

    2. ? ? DR(Digital Radiography)? ?? CR(Computed Radiography) Direct/Indirect Digital Radiography ? DR Detectors ? DR Image Preprocessing

    3. Digital radiograpy ? ?? ??????? Digital? ? TFT(Thin Film Transistor) ? F P D(Flat Panel Detector) ??? ?? ????

    4. Digital & Analog

    5. X-ray Imaging Technologies

    6. Computed Radiography

    7. Reading

    8. Recording/Reading/Erasing Cycle

    9. Image Plate (IP)

    10. IP ???? 1.??? ?? ???? ???? Eu++? Eu+++? ??, ?? ?? 2.?????? Fluoride Center(F+)? ?? 3.??? ???? Subsequent Exposure ?? ???? ????? ?? ? ??? ?????? ?? 4.??? ???? Eu++??? ??? ?? 390nm? ??? ???? ???? Eu++? ??? ?? 5.Phosphor??? ????? ??? 7?sec Light Exposure ??? ?????

    11. Digital Fluoroscopy

    12. CCD Technologies

    13. Selenium Technology

    14. Image Quality Parameters

    15. Contrast / Dynamic Range

    16. Limiting Spatial Resolution (LSR)

    17. Signal to Noise Ratio (SNR)

    18. Impact of Noise Quantum and electronic noise are unavoidable in a digital imaging chain. The effect, often expressed as signal-to-noise ratio (SNR), can vary widely from system to system. Signal          Useful Image Formation ----------   =   -------------------------------------- Noise           Erratic Information

    19. Modulation Transfer Function (MTF)

    20. Digital Detector Outperforms ...

    21. DR Data Processing ? Penetration X-ray Photon Data? FPD?? Electrical Analog Signal? ?? ? A/D Conversion Processing ?? ? Pixel Data(Gray Scale)? ?? ? DSP ??(Noise ??)

    22. Quality Assurance Plan Image Quality Signature Test (IQST) Phantom

    23. FDA Standard Parameters at Digital Radiography System Requirements : at DN-5 Condition 1) Horizontal MTF data sheets / Comparing Internet data 2) Vertical MTF data sheets / Comparing Internet data 3) DQE data sheets / Comparing Internet data 4) Low no of dead pixels 5) High resolution Monitor > 2k * 2k

    24. Digital Mammography

    25. Digital Mammography - Productivity

More Related