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Chapter 32

Chapter 32. Diagnostic Imaging. Radiation Safety. Powerful, dangerous Harmful to fetus Dosimeter Lead aprons. X-ray Machine. Three main parts Table, tube, control panel. Contrast Media. Radiopaque Radiolucent Types Barium sulfate Iodine compounds Air Carbon dioxide.

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Chapter 32

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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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