1 / 90

VET-120 Diagnostic Imaging

VET-120 Diagnostic Imaging. Course Set-up. 5 Lessons (Webinars) 5 Lesson Exams Final Proctored Exam Required Reading Diagnostic Imaging Study Guide Radiography in Veterinary Technology (Lavin – 4 th edition). Studying for Exams. Make copy of Lesson PowerPoints

fatima-washington
Download Presentation

VET-120 Diagnostic Imaging

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. VET-120Diagnostic Imaging

  2. Course Set-up • 5 Lessons (Webinars) • 5 Lesson Exams • Final Proctored Exam • Required Reading • Diagnostic Imaging Study Guide • Radiography in Veterinary Technology (Lavin – 4th edition)

  3. Studying for Exams • Make copy of Lesson PowerPoints • Take excellent notes during Webinars • Read & highlight Assigned Readings in Study Guide & Lavin book • Perform Self Checks in Study Guide • Learn the Glossaryat the beginning of each Chapter in Lavin book • Study Key Points & Review Questionsat end of each Chapter in Lavin book

  4. Lesson 1– X-ray Production and Safety

  5. Reading Prefaces to Lavin Textbook Why????? 

  6. Online Resources Animal Insides Veterinary E-News Magazine

  7. Animal Insideshttp://www.animalinsides.com/

  8. Pulldown Menu

  9. General Imaging Topics

  10. Digital Practice Topics

  11. Latest Imaging News

  12. Books You Need 

  13. Veterinary E-News Magazinehttp://www.vetxray.com/dyncat.cfm?catid=1393

  14. Latest Issue

  15. 2 Major Goals in Course • Learn how to take quality “Diagnostic X-rays” with minimum retakes • Learn Radiation Safety • Staff • Animal

  16. Glossary Terms – Page 4

  17. X-ray Production

  18. What Are X-rays? • Definition • X-rays are a form of electromagnetic radiation similar to visible light, but with a much shorter wavelength

  19. The Spectrum of Electromagnetic Waves

  20. Physical Properties of X-rays • Wavelength • Travel • Straight lines • Speed of light • Fluorescence • Captured on film • Biologic changes in living tissue

  21. Glossary Terms – Page 10

  22. Taking X-rays Exposure Factors Control Panel X-ray Machine

  23. Exposure Factors • Milliamperage (mA) • Peak Kilovoltage (kVp) • Exposure Time (S) • Focal-Film Distance (FFD) • Source-Image Distance (SID)

  24. Control Panel – 3 Exposure Factors • On/Off Switch • Milliamperage (mA) • Exposure time (fractions of a second) • kVp (peak kilovoltage) • Adjust this last • Exposure button/switch • 2 stage button? • 4th Exposure Factor – Focal-Film Distance • (on machine, not control panel)

  25. Anatomy of the X-ray Machine

  26. Parts of an X-ray Machine X-ray Tube Electrical Components Collimator Control Panel

  27. The X-ray Tube (Ray Gun) • Most expensive part of the machine

  28. A “Ray Gun” • An X-raymachine is essentially a camera. Instead of visible light, however, it uses X-rays to expose the film.

  29. The 5 Elements Needed to Make an X-ray Tube (Ray Gun)Figure 2-1, Page 11 Source of electrons – cathode Electron acceleration – transformers Electron path open – vacuum Electron target – anode Outside envelope – glass envelope

  30. The X-ray TubeFigures 2-1, 2-2 on pages 11-12 • 5 elements needed for x-ray production

  31. Flow of electrons from cathode to anodeFigure 2-2, Page 12

  32. Figure 2-7 Page 14 Example of a rotating anode.

  33. Heel effect – The intensity of the primary x-ray beam is not uniform throughout all areas of the beam; the intensity is greater toward the cathode sideof the x-ray beam because of the angle of the anode target area.

  34. Figure 2-8Page 14 Demonstration of the heel effect.

  35. Review of X-ray Tube Anatomy Anatomy of an x-ray tube. A, Cathode. B, Anode. C, Tungsten filament. D, Focusing cup. E, Accelerating electrons. F, Tungsten target. G, Glass envelope. H, Aluminum filter. I, Generated x-rays. J, Beryllium window.

  36. Summary:The Whole X-ray Story

  37. The Patient

  38. Black & White on Films • Black – x-rays NOT absorbed by animal’s body….. End up hitting film • White – x-rays absorbed by animal’s body…. Fewer get to film

  39. Collimator • Made of lead • Restricts (collimates) SIZE of primary x-ray beam • Limits patient & staff exposure to beam • Increases quality of x-ray beam • Less secondary (scatter) radiation • Does NOT intensify primary x-ray beam • Permanent & adjustable types

  40. Figure 2-18, Page 20 Collimator with lead shutters.

  41. Collimator – ↓ Scatter Radiation

  42. How Much to Collimate? • Ideally, every film should have a collimated edge around the entire film • Use of a smaller cassette is another means of collimating

  43. X-ray Positioning – X Marks the Spot! 

  44. Radiation Safety

  45. Glossary Terms – Page 24

  46. Ionizing Radiation • Definition • The use of electrons (an ionic subatomic particle) to produce x-rays • X-rays – an electromagnetic radiation that is a wave • Fundamental – Radiation should be respected, not feared!

More Related