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Radiology

QuestionAnswer
70. Which of the following statements are true? b. X-rays with shorter wavelengths penetrate farther than rays with longer wavelengths.
71. Electrons travel: c. Toward the anode in an x-ray tube.
72. Veterinary patients have a tendency to move while being positioned for radiographs to be taken. The radiographer should help to safely prevent artifacts of movement by: a. Using the shortest exposure time possible.
73. The anode’s target: d. All of the above
74. What is the thickness of the lead-impregnanted rubber lining protective apparel in veterinary radiography? c. 0.5mm
75. Scatter depends on: d. All of the above
76. Ways to increase penetrating power of x-rays include: a. Increasing kVp
77. The temperature of the filament within the cathode is controlled by: d. mA setting
78. Which of the following increases radiographic density? b. Increased mAs
79. Which of the following should have the shortest scale of contrast? c. Femur
80. The primary exposure factor that controls scatter radiation is: a. kVp
81. Which of the following statements is true? d. Nonscreen film requires greater exposure
82. Which of the following film-screen systems is most commonly used in veterinary medicine? c. Medium-speed system
83. What transformer in an x-ray machine controls the temperature of the filament? c. Autotransformer
84. What transformer controls the amount of kVp applied to the x-ray tube? c. Autotransformer
85. When depressing the "prep" switch on a rotating anode x-ray machine, you are effectively: d. Heating up the filament and spinning the rotating anode
86. The workplace program that has been developed to ensure radiation exposures are kept as low as possible is: a. ALARA
87. If cracks are present in protective apparel(PPE), they appear what when radiographed? c. Black
88. To take advantage of the "heel effect" a vet tech would do which of the following when positioning an animal for a study? a. Place the thickest part of the patient toward the cathode side of the x-ray tube
89. You have determined that penetration is adequate for a particular abdominal film. All structures are well outlined however the overall appearance of the film is too light. What should you do to make this a more diagnostic film? b. Increase mAs by 30-50%
90. When putting up a radiograph on the viewer for you veterinarian, how should you correctly position a VD of the abdomen? d. With head of the animal at the top of viewer and the animals right is the viewer's left
91. Which grid ratio can absorb more scatter radiation? a. 8:1
92. Which of the following are means of eliminating artifacts due to motion? d. Both a and c are correct
93. All of the following will appear black on the finished film except: c. Scratch on film emulsion
94. A body part to be radiographed has a significant difference in density between the thickest and thinnest parts, you would do the following: d. Take two separate exposures with different measurements
95. Which of the following should have the shortest scale of contrast? c. Femur
96. For proper radiographic exposure, one should take maximum: a. Expiration for the abdomen and inspiration for the thorax
97. The film gets darker when I use more radiation. This is an example of: c. c. direct proportionality.
98. Rectifiers are used in the x-ray circuit to ensure that: c. c. the current flows through the x-ray tube in a continu¬ous direction.
99. X-rays are produced when ________ electrons are attracted to _______________ by an electromagnetic force. b. b. negative, a positive anode
100. A good technique chart and knowledge of image pro¬duction is essential because: c. c. setting correct technical factors is essential to good imaging.
101. The purpose of an intensifying screen is to: c. c. convert the primary x-ray beam to light photons.
102. Two types of film are ________ emulsion and ________ emulsion film. d. d. double-, single-
103. Screen speed is determined by the _____ of the emul¬sion and the ____ of the silver halide crystals. c. c. thickness, size
104. Milliamperage is responsible for the intensity of the radiation, which: a. a. translates to the density on the image.
105. Motion degrades the image: a. a. because it detracts from resolution.
106. The source-image distance (SID) is the measurement: c. c. from the tube to the image receptor.
107. Grid ratio describes: b. b. the height of the lead strips compared with the dis¬tance between them.
108. Processing a film requires four separates steps. Which of the following lists the correct order? a. a. develop, fix, wash, dry
109. Radiation workers should always reduce radiation doses by following the: a. a. ALARA principle.
110. When radiation strikes a cell the most vulnerable area is the: b. b. DNA.
111. Three methods of radiation protection are: a. a. distance, leaded aprons, and leaded gloves.
112. A dog is lying on its abdomen. The view of the tarsus in this position would be called: b. b. plantarodorsal (PlD).
113. The proper field of view for a radius/ulna would include the: c. c. elbow and carpus.
114. You are radiographing a right feline craniocaudal humerus. The R marker is best placed: c. c. along the medial aspect.
115. Computerized radiography is similar to traditional radiography in that: c. c. they both use cassettes of similar sizes.
116. The imaging plate within the CR cassette: a. a. must be processed immediately because the image will not last.
117. Picture archiving and communications systems store the images: a. a. locally on hard drives or via the Internet anywhere in the world.
118. The normal radiographic views of the abdomen are generally the: d. d. right lateral and ventrodorsal.
119. Looking at the radiograph of an abdomen, you see that the pyloric antrum and body of the stomach are gas-filled and the axis of the stomach appears vertical. This view is likely a: a. a. ventrodorsal.
120. Why is a right lateral view suggested rather than a left lateral abdomen view? c. c. The liver appears slightly smaller.
121. The radiographic borders for a thoracic radiograph are the: c. c. shoulder joint to the first lumbar vertebral body.
122. Where should the radius and ulna, in the craniocaudal view, be measured? b. b. distal humerus.
123. A dog is exhibiting severe pain and trauma in the pelvic region. Which position would be best to complete using a vertical beam? a. a. Lateral with the affected side up.
124. The main principle of PennHIP is to: d. d. quantitatively measure canine hip joint laxity.
125. The ventrodorsal cervical vertebrae of a Cocker Spaniel are to be radiographed. It is best to measure and center at: a. a. the level of C6 to ensure adequate penetration of the caudal cervical vertebrae.
126. A lateral view of the thoracolumbar vertebrae is required. Where should the borders be? a. a. xiphoid to the last rib
Created by: Beabea