Welcome to your Radiography Name: Email: [The primary type of grid used in diagnostic imaging is:] Crosshatch Parallel Rhombic Focused None . [What type of current is required for proper operation of the x-ray tube?] Direct Falling load Alternating Fluctuating None . [Which of the following would be applicable to radiation therapy?] Inverse square law Law of Bergonie and Tribondeau Reciprocity law Ohm’s law None . [For a lateral projection of the wrist, the elbow must be flexed:] 45 degrees 90 degrees Only slightly Approximately 25 degrees None . [The apparent size of the focal spot as viewed by the image receptor is called the:] Actual focal spot Target angle spot Anode heel effect Effective focal spot None . [The test that measures the accuracy of adjacent mA stations is:] Exposure reproducibility Spinning top test Pinhole camera Exposure linearity None . [What effect does the use of radiographic grids have on contrast?] Decreases contrast Increases contrast No effect on contrast Increases contrast by absorbing scatter radiation None . [The abbreviation that stands for a stroke is:] hx Bx CVA MI None . [The lateral transthoracic humerus, oblique sternum,and lateral thoracic spine may be imaged best by using:] Short exposure time Breathing technique Image intensifier CT None . [For axial projection of the calcaneus, the central ray is angled how many degrees to the long axis of the foot?] 25 15 10 40 None . [The electricity provided to the radiology department operates at:] 120 pulses per second 60 pulses per second 110 pulses per second 220 pulses per second None . [The unit of radiation absorbed in air is the:] Sv Gya Bq Gyt None . [AECs may be tested using:] Phantoms Images of real patients Analog meters Fluoroscopic screens None . [Cosmic radiation:] Is present only in space Is a source of exposure only to persons who lie in the sun Is of concern only to space travelers Is a part of natural background exposure None . [The formal term for “no code” is a(n):] Advance directive Right to die Do not resuscitate (DNR) order Euthanasia None . [X-rays may remove electrons from atoms in the body by a process called:] Electrification Exposure Ionization Radicalizing None . [The upper boundary dose that can be absorbed that carries a negligible risk of somatic or genetic damage to the individual defines:] Maximum permissible dose ALARA Law of Bergonie and Tribondeau Effective dose limit None . [In computed radiography, each pixel corresponds to a shade of gray representing an area in the patient known as a(n):] Pathology Density Voxel Artifact None . [For a lateral projection of the wrist:] The radius and ulna should be superimposed The radial surface must be in contact with the image receptor The central ray is parallel Use the fastest image receptor speed possible None . [When an AP axial projection is performed for the os calcis, which of the following statements are true? 1. The leg should be fully extended 2. The plantar surface of the foot should be parallel to the image receptor 3. The central ray is directed 40 degrees cephalad to the long axis of the foot 4. The central ray enters the foot at the head of the fifth metatarsal 5. A cylinder cone may be used for this projection] 1, 3, 5 2, 4 2, 5 1, 3, 4, 5 None . [Structure D is the fig. ] Capitulum Olecranon process Radial head Ulnar head None Comment . [Radiation that exits the x-ray tube from the anode is called:] Remnant radiation Gamma radiation Nonionizing radiation Primary radiation None . [For an AP projection of the AC joints:] To show AC separation properly, joints both with and without weights should be shown on one image receptor if possible To show AC separation properly, separate images must be acquired with equal weights attached to both wrists and without weights The central ray is always directed midway between the AC joints The patient should be seated upright and instructed to continue shallow breathing during the exposure None . [The accuracy of collimation at a 72-inch SID must be:] ± 1.44 inches ± 7.2 inches ± 3.6 inches ± 0.02 inch None . [In digital fluoroscopy, the image should be viewed on what device to take advantage of the digital capabilities?] Digital viewbox High-resolution monitor High-definition TV Plasma TV None . [A variable transformer that is used to select kVp for the x-ray circuit is the:] Step-up transformer Autotransformer Step-down transformer Rectifier None . [The relationship between kVp and receptor exposure is:] Indirect Directly proportional Direct, although not proportional Inverse None . [What is used for total protection of the health care worker from every method of ransmission possible in the work setting?] Standard precautions Airborne precautions Contact precautions Droplet precautions None . [The latest digital fluoroscopic units use:] Nonionizing radiation CR cassettes Conventional image intensifiers Flat panel plates similar to DR None . [Most radiation-induced damage to cells occurs:] At diagnostic levels of radiation During fluoroscopy At doses of radiation much higher than doses used in radiography From background radiation None . Time's up
