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Comprehensive Guide to Diagnostic Imaging and Radiation Safety

Explore the world of diagnostic imaging and radiation safety. Learn about different imaging techniques, contrast media, patient preparation, and the role of technology in radiology. Discover how radiation therapy, nuclear medicine, and digitalization are revolutionizing healthcare.

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Comprehensive Guide to Diagnostic Imaging and Radiation Safety

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  1. Chapter 32 Diagnostic Imaging

  2. Radiation Safety • Powerful, dangerous • Harmful to fetus • Dosimeter • Lead aprons

  3. X-ray Machine • Three main parts • Table, tube, control panel

  4. Contrast Media • Radiopaque • Radiolucent • Types • Barium sulfate • Iodine compounds • Air • Carbon dioxide

  5. Patient Preparation • Proper preparation essential • Positioning the patient • Basic views PA View of Hand >>

  6. Fluoroscopy • Views internal organs in motion • Contrast medium given

  7. Diagnostic Imaging • Positron emission tomography (PET) • Uses computer and radiopharmaceuticals

  8. Diagnostic Imaging • Computerized tomography (CT) • Radiation beams produce cross-sectional images • Noninvasive

  9. Diagnostic Imaging • Magnetic Resonance Imaging (MRI) • Noninvasive • Cylinder-shaped machine contains electromagnet • Three types of MRI machines >>

  10. Diagnostic Imaging • Flat plates • Plain films • No special technique or contrast medium • Ultrasound • High frequency sound waves used to image • Transducer emits sound waves • Oscilloscope displays visual picture • Noninvasive

  11. Diagnostic Imaging • Mammography • Highest resolution and contrast • Fully regulated by the U.S. government • Digitalization

  12. Diagnostic Imaging • Filing films and reports • Part of patient’s permanent record • Store in special envelopes in a cool dry place and in the electronic medical record • Property of hospital/facility • Written report by radiologist sent to patient’s physician

  13. Radiation Therapy • General use to treat tumors • Inaccessible for surgical treatment • Shrinks tumor

  14. Stereotactic Radiotherapy • Beams of radiation from different directions meet at a specific point • Uses computerized imagery

  15. Nuclear Medicine • Radioactive compounds (radionuclides) used for: • Diagnosis • Therapy • Research • Uses a camera and nearby computer

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