Introduction to Imaging & Radiologic Sciences Chapter 1 Questions with Correct Solutions, A+

Radiation - Energy transmitted by waves through space or matter Energy - Capacity to work Forms of energy - Mechanical, Electrical, Heat, Nuclear, Electromagnetic What do we use energy for? - We use it to create images of anatomical structures or to look at physiologic action Ionization - Any process by which a neutral atom gains or loses an electron, thus acquiring a net charge Ionization affects the body in what way? - Can disrupt composition of matter and the result could be disruptive to life process Because of ionization? - We want to provide protection to prevent any excessive exposure to radiation Mechanical - Sound Sound - Non-ionizing radiation: through matter Sound creates images by recording - Reflected sound waves through a transducer Registered Diagnostic Medical Sonography: Use of high frequency sound waves - RDMS (ARDMS) Registered Vascular sonographer - RVT (ARDMS) Registered Diagnostic cardiac sonographer - RDCS (ARDMS) Electrocardiography - ECG or EKG Electrocardiography - Produces a record of the heart using electricity Electroencephalography - EEG Electroencephalography - The process of producing a record of the brain using electricity Are methods of imaging the electrical activities of the heart and of the brain, respectively. The graphs they produce provide useful information about the physiologic activity of these organs - Electrocardiography and Electroencephalography methods Thermograms - The body's naturally emitted heat energy can produce images for diagnostic purposes In demonstrating condition such as changes in the body's circulation - Thermograms are useful for Nuclear Energy is emitted by - the nucleus of an atom Nuclear Energy - Nuclear Medicine Technology uses what form of energy Nuclear energy is what type of radiation - Ionizing radiation Nuclear Medicine Technology - Uses nuclear energy to create images of both anatomic structures and physiologic actions Nuclear Medicine Technologist - Uses nuclear energy to introduce a radioactive substance into the patient for diagnostic and therapeutic purposes, so the substance will emit gamma radiation from their nuclei. The gamma radiation will come off the pt, and be picked up by the nuclear medicine equipment. Gamma radiation - is a form of electromagnetic energy that has the ability to ionize atoms The nuclear radiation is pick up by - Nuclear medicine equipment and taken into a computer to create a image Electromagnetic Energy forms - X-rays (man-made form) Radio waves Light X-rays (man-made form) - Are created when electrons moving at high speed are suddenly stopped; ionizing