Introduction to Radiography

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					Introduction to
Radiography
Radiation

   Energy that is transmitted by waves
    through space or a medium
Energy

   The capacity to operate or work

    Higher forms of energy like x-rays have
      the ability to ionize atoms in matter.
Ionization

   Any process by which a neutral
    atom gains or loses an electron thus
    acquiring a net charge.
Types of Energy
   Mechanical energy
       The ability to do work due to motion or
        location
   Thermal energy
       Transmittance of heat
   Nuclear energy
       Energy emitted by the nucleus of an atom
   Electromagnetic energy
       The man made form is x-rays
Radiography

   The making of film records known
    as radiographs of internal structures
    of the body by passage of x-rays
    through the body to act on specially
    sensitized film.
History of Radiography

   November 8, 1895 is the recognized
    day of the discovery of x-rays by
    Wilhelm Conrad Roentgen, a
    German physicist.
Cathode

   Contains a filament which emits
    electrons when heated.
   Considered the negative side of the
    tube.
Anode

   A cold metallic palte on the other
    side of the tube.
   Considered the positive side of the
    tube.
Radiologic technology

   Technical science that deals with
    the use of x-rays or radioactive
    substances for diagnostic or
    therapeutic purposes in medicine.
Radiologic Technologist (RT)

   Individuals qualified to use radiation
    to produce images of the internal
    parts of the body for interpretation
   Also called radiographers
   Our title R.T. (R) means registered
    technologist (radiography)
American Registry of Radiologic
Technologist (ARRT)

   The governing board which
    administers the registry
    examination for all RTs
Radiologist

   A physician that interprets
    radiographic images
Specialties in Radiography
   Cardiovascular Interventional Technology
    (CVIT)(VIT)
       Angiography -Radiologic examination of the
        blood vessels after injection of contrast
        medium
       Cardiac catherization – placing a catheter in
        one of the chambers of the heart and coronary
        arteries
       Angioplasty – treatment of blocked blood
        vessels without the need for invasive surgery
Specialties in Radiography

   Mammography
       Radiographic examination of the breast
Specialties in Radiography

   Computed Tomography (CT)
       A specialized form of radiography which
        utilizes special equipment for imaging
        the body in various planes
Specialties in Radiography

   Nuclear Medicine Technology (NMT)
       Involves imaging parts of the patient
        after the introduction of a radioactive
        material known as a radio
        pharmaceutical either orally or
        intravenously.
Specialties in Radiography

   Magnetic Resonance Imaging
       Uses a strong magnetic field and raio
        waves along with a computer to
        generate sectional images of the
        patient’s anatomy
Specialties in Radiography

   Radiation Therapy
       Administration of high energy ionizing
        radiation to treat primarily malignant
        tumors (cancers)

       Radiation therapist
            Technologist
       Radiation oncologist
            Physician
Specialties in Radiography

   Sonography
       Visualization of structures of the body
        by recording ultrasound waves directed
        into tissue

            Sonographer
                 Technologist
Additional Opportunities for RTs

   Education
       Clinical instructor
       Clinical coordinator
       Program coordinator
       Instructor / faculty member
Additional Opportunities for RTs

   Administration
       Supervisors
       Chief technologists
       Managers
       Department heads
Additional Opportunities for RTs

   Commercial firms
       Sales
       Equipment maintenance
       Technical support personnel
       Consultants
The Health Care Team
   Doctors
   Nurses
   Therapist
   Health information services
   Diagnostic services
       Radiology
       Medical technologist
       Clinical laboratory
       Electroencephalography