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RAD 156 HESI

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
Computed radiography (CR) image receptors (IR) should be erased for this reason   show
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show Height of the lead strips divided by the width of the interspace material  
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3 identifying pieces of information important to include on each digital image?   show
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70 kilovolts peak (kVp) at 25 milliampere-seconds (mAs) produces 1.6 mR.   show
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show Spatial resolution in digital imaging  
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show Hospital information system  
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Adjusts image brightness, regardless of your WACK x-ray skills   show
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How does an increase in noise affect the quality of a digital image?   show
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show Emphysema  
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What are recommended uses of the digital annotation tool? 1. Enter technical factors. 2. Label central ray projection. 3. Indicating date or time of the exam. 4. Label right or left side of anatomy. 5. Indicating radiographer performing the exam.   show
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How is signal maximized to a digital image receptor? Shorter exposure time. Longer exposure time. Lower milliamperage (mA) setting. Higher source to image receptor distance (SID) value.   show
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Edge enhancement helps with this type of digital processing?   show
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show Image noise.  
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show Increase contrast  
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Part of the x-ray circuit producing the heat necessary for thermionic emission?   show
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show Contrast resolution is decreased.  
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How often should lead aprons be evaluated to determine if cracks or holes are present?   show
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show Health level 7 (HL-7).  
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Which pathologic condition requires a reduction in exposure factors to produce an acceptable image? Atelectasis. Emphysema. Late stage Paget's disease. Congestive heart failure (CHF).   show
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Function of a rectifier?   show
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Which technique mimics the use of a grid?   show
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This temporarily stores an electric charge?   show
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show 12.8 inches.  
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show Shuttering  
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The radiographer is using automatic brightness control during fluoroscopy. What change in patient exposure should the radiographer expect as the patient size increases?   show
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show Picture archival and communication system (PACS).  
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show 8, 10, 12, 14  
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Picture archiving and communication system networks are capable of performing which functions? 3. Track radiology scheduling information. 4. Download images from different imaging modalities. 5. Transmit diagnostic images to remote work stations.   show
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A radiographer makes an exposure using an 8:1, 100 line per inch grid. When processing the image plate (IP) through the reader, the radiographer notices that a Moire pattern is seen on the displayed image. What is the probable cause of this artifact?   show
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show Selecting only the detector on the left side.  
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Without changing any other factors, which effect is caused by decreasing the field size from 14X17 inches to 8X10 inches?   show
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show Use a 72-inch source-image-receptor-distance (SID).  
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show Source to image receptor distance (SID).  
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Which is the most likely cause of a histogram error?   show
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show 1,2,3,4  
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show TRUE  
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show HIS.  
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Which change in technical factors is most likely to result in decreased exposure to the image receptor (IR)?   show
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Which change should be made when performing an abdomen radiograph on a patient with ascites?   show
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A radiographer is performing a forearm exam on a patient with advanced Parkinson’s Disease. Which technical factor adjustments should be used?   show
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What is the most likely reason for the increase in quantum noise on a computed radiography (CR) image?   show
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X-ray machines are designed to operate at a specific and continuous supply voltage. Which part of the imaging system is responsible for keeping incoming voltage adjusted to the proper value?   show
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show Increase the source-image receptor-distance (SID).  
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show Quantity of x-rays.  
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show Increase in spatial resolution.  
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Source of electrons, electrons in high speed motion, and electrons suddenly stop   show
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show a nuclear fragment is emitted  
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show increasing kVp and increasing photon energies  
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show 56 keV  
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show secondary  
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show Any  
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show increased and increased  
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show atomic number of material  
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show 0.5  
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These three things affect differential absorption   show
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Characteristic x-rays, an ionized atom and a photoelectron are by products of this   show
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