HESI EXIT EXAM The Newest and Updated Correct Questions and Answers 100% Excel A+ Graded Which change should be made when performing an abdomen radiograph on a patient with ascites? - CORRECT ANSWER -Raise exposure factors. Which system can store images? - CORRECT ANSWER -Picture archival and communication system (PACS). What is the result if pixel bit depth is decreased? - CORRECT ANSWER -Contrast resolution is decreased. Prior to performing a posteroanterior (PA) chest projection with automatic exposure control (AEC), the radiographer discovers that the patient has had a right total pneumonectomy. Which technical consideration should be considered? - CORRECT ANSWER -Selecting only the detector on the left side. Without changing any other factors, which effect is caused by decreasing the field size from 14X17 inc hes to 8X10 inches? - CORRECT ANSWER -Decrease in the amount of scatter radiation within the part. How often should lead aprons be evaluated to determine if cracks or holes are present? - CORRECT ANSWER -Annually. An increase in which factor will improve spatial resolution? - CORRECT ANSWER -Source to image receptor distance (SID). What is the most likely reason for the increase in quantum noise on a computed radiography (CR) image? - CORRECT ANSWER -Lower than requi red milliampere -
seconds (mAs). Which information in the patient history should prompt the radiographer to decide against using automatic exposure controls when taking a chest x -ray? - CORRECT ANSWER -Emphysema. Which statement is true regarding exposure i ndicator and the evaluation of digital images? - CORRECT ANSWER -Exposure indicator must be reviewed with every image and must fall within the manufacturer's acceptable range. Which digital communication network is used to store patient billing information ? - CORRECT ANSWER -HIS. Which digital post -processing results in a black background surrounding the original collimated edges? - CORRECT ANSWER -Shuttering. Which device temporarily stores an electric charge? - CORRECT ANSWER -Capacitor. What are recommen ded uses of the digital annotation tool? (Select the four that apply.) - CORRECT ANSWER -Entering technical factors Indicating date or time of the exam Labeling central ray (CR) projection Indicating radiographer performing the exam How does an increase i n noise affect the quality of a digital image? - CORRECT ANSWER -Contrast is decreased. Which pathologic condition requires a reduction in exposure factors to produce an acceptable image? - CORRECT ANSWER -Emphysema. The radiographer is using automatic bri ghtness control during fluoroscopy. What change in patient exposure should the radiographer expect as the patient size increases? - CORRECT ANSWER -Increase in exposure. Which calculation is used to determine grid ratio? - CORRECT ANSWER -Height of the lead strips divided by the width of the interspace material. Which is the most likely cause of a histogram error? - CORRECT ANSWER -Selection of an incorrect exam from the look -up table. Picture archiving and communication system (PACS) networks are capable of performing which functions? (Select the two that apply.) - CORRECT ANSWER -
Transmitting diagnostic images to remote work stations. Downloading images from different imaging modalities . Who judges radiographic images for quality? (Select the four that apply.) - CORRECT ANSWER -Radiographers Ordering physicians Radiologists Quality control technologists How can magnification of the heart be reduced when performing a chest x -ray? - CORRE CT ANSWER -Use a 72 -inch source -image -receptor -distance (SID). What is the function of a rectifier? - CORRECT ANSWER -Convert alternating current to pulsating direct current. Which change in technical factors is most likely to result in decreased exposure to the image receptor (IR)? - CORRECT ANSWER -Increased grid ratio Which technique produces a 2 milliroentgens (mR) exposure to an image receptor plate if 70 kilovolts peak (kVp) at 25 milliampere -seconds (mAs) produces 1.6 mR? - CORRECT ANSWER -70 kVp at 3 1.25 mAs Consider this anteroposterior (AP) mobile chest image. What will improve the photographic quality of this image? - CORRECT ANSWER -Using a grid On which system does hospital staff input new orders for radiologic examinations? - CORRECT ANSWER -Hospital information system. Which part of the x -ray circuit is controlled by adjusting the milliamperage (mA) setting on the operating console for the purpose of producing the heat necessary for thermionic emission? - CORRECT ANSWER -Filament circuit Which standard governs communication between the system that contains the patient's full medical information and the system that has radiology -specific data? - CORRECT ANSWER -Health level 7 (HL -7). Why should computed radiography (CR) image receptors (IR) be er ased if they haven't been used? - CORRECT ANSWER -Remove fog from background radiation. Which step will reduce digital image noise, assuming no other changes? - CORRECT ANSWER -Longer exposure time What is the term for the adjustment of image brightness, regardless of exposure received? - CORRECT ANSWER -Rescaling A radiographer is performing a forearm exam on a patient with advanced Parkinson's Disease. Which technical factor adjustments should be u sed? - CORRECT ANSWER -
Decrease the exposure time to reduce risk of patient motion. What is the longest field size dimension allowable for 10 inches by 12 inches collimation at a 40 inch source to image distance (SID)? - CORRECT ANSWER -12.8 inches Which x -ray beam characteristic is reduced by adding aluminum filtration? - CORRECT ANSWER -Quantity of x -rays Which steps increase contrast in fluoroscopy? (Select the two that apply.) - CORRECT ANSWER -Reduce kilovolts peak (kVp) Use a smaller collimator field. 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? - CORRECT ANSWER -Line compensator. How does the Density log Exp osure (D log E) curve appear for a digital imaging receptor (IR)? - CORRECT ANSWER -A straight line at a 45 degree angle. Why should a radiographer routinely use a small focal spot when imaging extremities? - CORRECT ANSWER -Increase in spatial resolution. Place these bit depths in order from the one that will produce the least number of grays to the one that will produce the greatest number of grays. - CORRECT ANSWER -8. 10. 12. 14. A radiographic rating chart is provided for a portable unit. Which combina tion of milliamperes (mA), seconds, and kilovolts peak (kVp) is permissible for a single exposure according to the chart? - CORRECT ANSWER -100 mA, 1/20 second, 110 kVp Study the provided filament thermal emissions chart. Note the distinct shoulder on each kilovolt peak (kVp) curve. What do these shoulders indicate? - CORRECT ANSWER -The space charge limited region Which technique mimics the use of a grid? - CORRECT ANSWER -Increased object -to-
image -receptor -distance (OID). 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? - CORRECT ANSWER -The grid had a freque ncy similar to the reader's sampling frequency Which identifying information is important to include on each digital image? (Select the three that apply.) - CORRECT ANSWER -Patient's name Patient's date of birth Health care facility.
seconds (mAs). Which information in the patient history should prompt the radiographer to decide against using automatic exposure controls when taking a chest x -ray? - CORRECT ANSWER -Emphysema. Which statement is true regarding exposure i ndicator and the evaluation of digital images? - CORRECT ANSWER -Exposure indicator must be reviewed with every image and must fall within the manufacturer's acceptable range. Which digital communication network is used to store patient billing information ? - CORRECT ANSWER -HIS. Which digital post -processing results in a black background surrounding the original collimated edges? - CORRECT ANSWER -Shuttering. Which device temporarily stores an electric charge? - CORRECT ANSWER -Capacitor. What are recommen ded uses of the digital annotation tool? (Select the four that apply.) - CORRECT ANSWER -Entering technical factors Indicating date or time of the exam Labeling central ray (CR) projection Indicating radiographer performing the exam How does an increase i n noise affect the quality of a digital image? - CORRECT ANSWER -Contrast is decreased. Which pathologic condition requires a reduction in exposure factors to produce an acceptable image? - CORRECT ANSWER -Emphysema. The radiographer is using automatic bri ghtness control during fluoroscopy. What change in patient exposure should the radiographer expect as the patient size increases? - CORRECT ANSWER -Increase in exposure. Which calculation is used to determine grid ratio? - CORRECT ANSWER -Height of the lead strips divided by the width of the interspace material. Which is the most likely cause of a histogram error? - CORRECT ANSWER -Selection of an incorrect exam from the look -up table. Picture archiving and communication system (PACS) networks are capable of performing which functions? (Select the two that apply.) - CORRECT ANSWER -
Transmitting diagnostic images to remote work stations. Downloading images from different imaging modalities . Who judges radiographic images for quality? (Select the four that apply.) - CORRECT ANSWER -Radiographers Ordering physicians Radiologists Quality control technologists How can magnification of the heart be reduced when performing a chest x -ray? - CORRE CT ANSWER -Use a 72 -inch source -image -receptor -distance (SID). What is the function of a rectifier? - CORRECT ANSWER -Convert alternating current to pulsating direct current. Which change in technical factors is most likely to result in decreased exposure to the image receptor (IR)? - CORRECT ANSWER -Increased grid ratio Which technique produces a 2 milliroentgens (mR) exposure to an image receptor plate if 70 kilovolts peak (kVp) at 25 milliampere -seconds (mAs) produces 1.6 mR? - CORRECT ANSWER -70 kVp at 3 1.25 mAs Consider this anteroposterior (AP) mobile chest image. What will improve the photographic quality of this image? - CORRECT ANSWER -Using a grid On which system does hospital staff input new orders for radiologic examinations? - CORRECT ANSWER -Hospital information system. Which part of the x -ray circuit is controlled by adjusting the milliamperage (mA) setting on the operating console for the purpose of producing the heat necessary for thermionic emission? - CORRECT ANSWER -Filament circuit Which standard governs communication between the system that contains the patient's full medical information and the system that has radiology -specific data? - CORRECT ANSWER -Health level 7 (HL -7). Why should computed radiography (CR) image receptors (IR) be er ased if they haven't been used? - CORRECT ANSWER -Remove fog from background radiation. Which step will reduce digital image noise, assuming no other changes? - CORRECT ANSWER -Longer exposure time What is the term for the adjustment of image brightness, regardless of exposure received? - CORRECT ANSWER -Rescaling A radiographer is performing a forearm exam on a patient with advanced Parkinson's Disease. Which technical factor adjustments should be u sed? - CORRECT ANSWER -
Decrease the exposure time to reduce risk of patient motion. What is the longest field size dimension allowable for 10 inches by 12 inches collimation at a 40 inch source to image distance (SID)? - CORRECT ANSWER -12.8 inches Which x -ray beam characteristic is reduced by adding aluminum filtration? - CORRECT ANSWER -Quantity of x -rays Which steps increase contrast in fluoroscopy? (Select the two that apply.) - CORRECT ANSWER -Reduce kilovolts peak (kVp) Use a smaller collimator field. 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? - CORRECT ANSWER -Line compensator. How does the Density log Exp osure (D log E) curve appear for a digital imaging receptor (IR)? - CORRECT ANSWER -A straight line at a 45 degree angle. Why should a radiographer routinely use a small focal spot when imaging extremities? - CORRECT ANSWER -Increase in spatial resolution. Place these bit depths in order from the one that will produce the least number of grays to the one that will produce the greatest number of grays. - CORRECT ANSWER -8. 10. 12. 14. A radiographic rating chart is provided for a portable unit. Which combina tion of milliamperes (mA), seconds, and kilovolts peak (kVp) is permissible for a single exposure according to the chart? - CORRECT ANSWER -100 mA, 1/20 second, 110 kVp Study the provided filament thermal emissions chart. Note the distinct shoulder on each kilovolt peak (kVp) curve. What do these shoulders indicate? - CORRECT ANSWER -The space charge limited region Which technique mimics the use of a grid? - CORRECT ANSWER -Increased object -to-
image -receptor -distance (OID). 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? - CORRECT ANSWER -The grid had a freque ncy similar to the reader's sampling frequency Which identifying information is important to include on each digital image? (Select the three that apply.) - CORRECT ANSWER -Patient's name Patient's date of birth Health care facility.
