1 / 23

X-rays

X-rays. P3.1.1. Starter - What do you know about X-rays?. Think-pair-share Make a spider diagram of all the things you already know about X-rays. Aims. Describe what we use X-rays in hospitals for. Explain why X-rays are dangerous. Justify the need for a CT scanner. . Objectives.

sahara
Download Presentation

X-rays

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. X-rays P3.1.1

  2. Starter - What do you know about X-rays? • Think-pair-share • Make a spider diagram of all the things you already know about X-rays

  3. Aims • Describe what we use X-rays in hospitals for. • Explain why X-rays are dangerous. • Justify the need for a CT scanner.

  4. Objectives • Using learned knowledge and proper understanding, produce a spider diagram of ideas and uses for Xrays. • Write a paragraph to explain why radiation is dangerous, using key words and information from the video. • Complete the table to compare CT scanners and X-ray machines.

  5. Key words • X-ray • Radiograph • CT scanner • Absorb • Damage • Penetrate • Cell mutation

  6. Question • Why is a crack in a bone visible in an x-ray? • What would it look like? • How come we can only see the bones, not the soft tissue?

  7. Broken bone X-ray

  8. Radiographs (X-ray images) • Read the information about X-rays on the A4 sheet. • Underline all the key words. • Highlight any information about what might show up on an X-ray image.

  9. Task • Draw around your hand. • Draw the parts of the hand that would be visible on an X-ray.

  10. Why is radiation dangerous? • this video shows the radiation being emitted by an X-ray tube. The radio emissions are counted using a Geiger counter. • http://www.youtube.com/watch?v=iJ9TYCZXzcE

  11. Question • Why does the film badge worn by people who work with radiation have a plastic case, rather than a metal one?

  12. X-ray therapy • X-rays are not just used to produce radiographs of broken bones. • We can also use them to destroy cancerous tumors in the body. Thick plates are placed between the x-ray tube and they body to stop healthy tissues being damaged. A gap between the plates allows the X-rays to reach the tumor.

  13. X-ray therapy

  14. How an X-ray tube works • http://www.youtube.com/watch?v=Bc0eOjWkxpU&feature=endscreen

  15. The CT scanner • A computerised tomography scanner makes digital cross sections of the body and can be used to make 3d constructions of organs.

  16. The CT scanner

  17. Task • Complete the table, using the information you have learned during the lesson.

  18. Peer marking

  19. Peer marking

  20. Question • Which do you think gives a higher dose of radiation? • The CT scanner or the X-ray machine? • Explain your ideas.

  21. Question • When an X-ray is taken, why is it necessary: • To place the patient between the x-ray tube and the film cassette? • To have the film in a light proof cassette? • To shield the parts of the body not under investigation from x-rays? What would happen to the healthy cells?

  22. ..Back to your spider diagram • Using a different colored pen, Add any new ideas you have learned or interesting facts to your spider diagram.

More Related