New Quiz 19 Dec Welcome to your Radiography Name: Email: [The ability of different types of radiation to produce the same biological response in an organism is called:] LET WR RBE Doubling dose None . [Which of the following means there is a safe level of radiation for certain effects and those effects are directly proportional to the dose received when the safe level is exceeded?] Nonlinear-nonthreshold effect Linear-nonthreshold effect Linear-threshold effect Nonlinear-threshold effect None . [The greatest source of natural background radiation exposure is:] Cosmic rays Radioactive materials The body itself Radon gas None . [For AP projection of the foot, the central ray enters at the:] Head of the third metatarsal Head of the second metatarsal Base of the first metatarsal Base of the third metatarsal None . [Which of the following is an example of invasion of privacy?] Radiographing the wrong patient Unjustified restraint of patient Improperly exposing the patient’s body Radiographing the wrong body part None . [The process of cell division for germ cells is called:] Mitosis Spermatogenesis Organogenesis Meiosis None . [Waves of radiation are called:] Sine waves Strong waves Signal waves Current waves None . [Located below the tubercles of the humerus is (are) the:] Greater and lesser tubercles Bicipital groove Capitulum Surgical neck None . [The structure designated as II is the fig.] Medial condyle Lateral condyle Intercondylar eminence Head of the fibula None Comment . [For AP projection of the cervical spine, the central ray is directed:] 10 degrees cephalad Parallel to C4 15 to 20 degrees caudad 15 to 20 degrees cephalad None . [Structure D is the fig.] Rugae Haustra Pylorus Incisura angularis None Comment . [Which of the following statements are true concerning positive contrast media? (choose 4)] Air is the most commonly used Aqueous iodine compounds may be used if perforations are suspected Barium should be mixed with cold water for retrograde administration Nonionic contrast media are ideal for injection because they do not contain iodine, reducing the risk of reactions Barium is an inert substance Aqueous iodine compounds may cause serious dehydration Barium is a surgical contaminant None . [For RAO position of the sternum:] The body should be rotated 45 to 60 degrees to prevent superimposition of the sternum and spine The patient is supine Breathing should be shallow during exposure; a falling load generator should not be used, if possible The best image is obtained with suspended breathing None . [The structure designated as I is the Fig.] Pars interarticularis Superior articular process Pedicle Lamina None Comment . [Diabetic patients should be scheduled:] Later because of their need for insulin Early because of their need for insulin Just before mealtime Just after mealtime None . [The visible image may also be called the:] Manifest image Image-in-waiting Preprocessed image Latent image None . [Which of the following governs the relationship between SID and receptor exposure?] Reciprocity law 15% rule Inverse square law Ohm’s law None . [The primary purpose of performing oblique projections of the ribs is:] To image the axillary portion of the ribs To image the ribs above the diaphragm To image the ribs below the diaphragm To determine the extent of the patient’s pain tolerance None . [Which of the following terms describes the highest spatial frequency that can be recorded by a digital detector?] Spatial resolution Contrast resolution MTF Nyquist frequency None . [If SID is reduced by one half, what must be done to mAs to maintain a constant receptor exposure?] Reduce mAs to one fourth its original value Reduce mAs to one half its original value Increase mAs by four times its original value Increase mAs by two times its original value None . [An imaging exam using a contrast agent to visualize the uterus and fallopian tubes is called a(n):] Uterogram Hysterosalpingogram Intravenous urogram Pregnancy study None . [The portion of the image-intensifier tube that converts electron energy to visible light is the:] Output phosphor Photocathode Input phosphor Detector element None . [What is the type of infection control in which microorganisms have been eliminated as much as possible by the use of water and chemical disinfectants?] Medical asepsis Surgical asepsis Standard precautions Gas sterilization None . [Which of the following bones has a coronal suture?] Frontal bone Temporal bone Occipital bone Parietal bone None . [Decreased SID causes image:] Minification Foreshortening Elongation Magnification None . [Wavelength is defined as the distance from:] The x-ray tube to the patient The cathode to the anode The bottom of a wave to the top Peak to peak of the wave None . [Structure F is the fig. ] Hamate Trapezium Trapezoid Capitate None Comment . [Structure C is the fig] Body of sphenoid Occipital bone Dorsum sellae Anterior clinoid process None Comment . [What body type is a slender build?] Hypersthenic habitus Sthenic habitus Hyposthenic habitus Asthenic habitus None . [The amount of radiation that causes the number of genetic mutations in a population to double is called the:] Threshold dose Doubling dose Mutagenic dose Genetic dose None . Time's up
