ARRT Exam Questions with verified Answers

ARRT Exam Questions with verified Answers .1 Rem = ? Seivert - ANSWER-1 Sievert .# of grid lines per inch or centimeter defines? - ANSWER-Grid Frequency .0.1 Gray = ? Rad - ANSWER-10 Rad .1 Gray = ? Rad - ANSWER-100 Rad .A common group of drugs that are used to promote defecation are termed? - ANSWER-cathartics .A decrease in blood count is the earliest response seen to dose radiation. It can occur at dosease as low as? - ANSWER-25 Rads or .25 Gray .A geometric characteristic of a computerized image is known as? - ANSWER-Spacial resolution .A patient develops hives several minutes after a radiologic contrast agent has been administered. Which type of drug may the patient be given to counteract the reaction? - ANSWER-Antihistamine Benadryle Claritan Sudafed Zyrtec .A radiologist requires 60 percent more than the normal 50 cc dose of radiographic contrast media to be used for a urologic procedure. The cc's to be prepared is - ANSWER-80 cc's .A RT Lateral Decub is taken of a patient with the grid placed behind the patient. This is an example of a ...? - ANSWER-AP Projection .About what percentage of radiographic density is due to light emitted by an intensifying screen phosphor? - ANSWER-95-98% .According to Bushong, tabletop intensity should NOT exceed what? - ANSWER-2.1 mR per min for each mA operating at 80 kVp. .According to quality assurance programs, how often should the chemicals be changes in an automatic processor? - ANSWER-Once a month .Adding two tsp of salt per liter of water used in an enema preparation may prevent? - ANSWER-Hypervolemia .An older x-ray tube that has evaporated tungsten deposited on the tube window may cause one or more of the following problems. - ANSWER-Decreased tube output Arcing of the tube .Anatomic organ used for phonation is called the? - ANSWER-Larynx .Anterior curvature of the vertebral column is called? - ANSWER-Lordosis Convexed Ex: Lumbar C-Spine .Appearance of grid lines on radiograph with the table Bucky in use indicates? - ANSWER-Exposure time too short .As the field size is increased with all other factors remaining constant, the scale of contrast will? - ANSWER-Be lengthened .Beam limiting devices will? (3) - ANSWER-Improve image quality Reduce patient dose Reduce scatter radiation .Cataractogenesis occurs after acute or chronic exposures of how many Rads? - ANSWER-200 Rads, 2 Gray .Compared to analog imaging, CR has the advantage of? - ANSWER-Larger dynamic range .Contrast can be measured from the characteristic curve by finding the tangent of which of the following? - ANSWER-Straight line portion .Densitometer film density measurement of 3 corresponds to approx _____ of the light from a view-box being transmitted thru the film? - ANSWER-0.1% .Describe the damage potential of ionization? - ANSWER-Chain reaction in the human body that may eventually cause biologic damage. X-rays are from the Electric Magnetic Spectrum or radiation energy and is considered harmful in high energy ranges. .Destruction or alteration of medical records, such as the radiology report, by an unauthorized person is referred to as? - ANSWER-Spoliation .Determinatio of radiologic bone age is most frequently applied to the? - ANSWER-Hand & Wrist .Disadvantage of a flat panel direct capture detector is? - ANSWER-Difficult in mobile imaging .Disadvantage to having 3 mm Al Equivalent? - ANSWER-Would require an increase in technical factors defeating the purpose of filtration. .During cardiopulmonary resuscitation of an adult, the cardiac compression rate should be about - ANSWER-80-100 per min .During cystography, when ureteral reflux is suspected, it is often necessary to include a radiograph with the patient? - ANSWER-Voiding .During latent image formation, the concentration of metallic silver in the exposed crystals occurs in the region of the sensitivity specks. This explanation of the formation of the image is reffered to as? - ANSWER-Gurney-Mott theory .Electrical current being generated by a charge created in air thru ionization by x/gamma radiation is called a? - ANSWER-Ion Chamber .Example of Deterministic Effect? - ANSWER-Cataracto-genesis .Example of personnel monitor that measures radiation thru chemical change reaction? - ANSWER-Film Badge - Operate off Gurney-Mott theory. .Example of Radiosensitive stem cells? - ANSWER-Neuroblasts Spermatogonia .Examples of Deterministic or Non-Stochastic associated with a threshold dose? - ANSWER-Cataracts (2 grey - 200 Rad) .Examples of Stochastic, Non-Deterministic, Non threshold dose? - ANSWER-Leukemia Thyroid Cancer Genetic Effects .Explain the Gurney-Mott Theory...? - ANSWER-Describes how an x-ray photon changes silver halide into atomic silver in the film emulsion--a definite chemical change. .Following a sudden change of posture from the recumbent to the erect position, the patient may experience syncope due to a condition known as - ANSWER-Orthostatic Hypotension .For all dedicated chest units whose tube potential routinely exceeds 90 kVp, the minimum recommended grid ratio is? - ANSWER-8:1 .For which type of body habitus will the diaphragm be at the highest position? - ANSWER-Hypersthenic .How long can a film badge be worn? - ANSWER-No more than a month .How many degrees and in which direction should the central ray be directed for an AP projection of the sternum? - ANSWER-15 degrees cephalic