HESI Practice Test 1 Questions and Answers Reupdated

HESI Practice Test 1 increasing the diameter of the conductor - Which change causes a decrease in resistance and an increase in current flow? PA oblique - Which projection of the thumb requires digits two through five to be extended, with the palmar surface of the hand flat against the IR as if for a PA hand projection? lethal dose for 50% of the population in 30 days - Which statement correctly describes the LD 50/30? low contrast solutions - Where is edge enhancement post processing most helpful in digital radiography? selection of an incorrect exam from the look-up table - Which is the most likely cause of a histogram error? orthostatic hypotension - A patient who complains of blurred vision and dizziness upon standing for an upright chest x-ray may be experiencing which condition? stand with feet a greater distance apart - How should a radiographer increase the stability of the base of support? labeling CR projection, indicating radiographer performing the exam, indicating date or time of the exam and entering technical factors - What are recommended uses of the digital annotation tool? primary - Which term refers to the radiation that exits the x-ray tube through the collimator? battery - A radiographer receives a request for a portable chest x-ray and then performs the x-ray on the incorrect patient. Which legal term best describes the actions of the radiographer? fast-moving electrons approach the nucleus of the target atom and slow down - The majority of x-rays in the useful beam are created as a result of which process? 15 degrees - Which angle of insertion is recommended when performing venipuncture? 1. placing used needles in sharps containers 2. placing biologically soiled linens in biohazard linen bags 3. washing hands frequently and using hand lotion afterward 4. wearing exam gloves and changing them between each patient - Which actions should the radiographer take to help prevent acquired infections in hospitals or clinics? HIS - Which digital communication network is used to store patient billing information? kVp - Which item can be used as an indicator of the quality of the diagnostic x-ray beam? consider the package contaminated and replace it with a sterile item - During preparation for a surgical procedure, an unopened sterile package becomes damp from an accidental spill of saline. Which response is most appropriate? threshold - What is the dose-response relationship of radiation-induced skin cancer? 30 degree medial oblique - The tarsal sinus is visualized when the foot is seen in what projection? fourth - On an accurately positioned PA chest radiograph, the manubrium of the sternum is seen at the level of which thoracic vertabrae when the patient is sthenic? AP centered to T12-L1 - Following administration of contrast media, the radiologist asks the radiographer to obtain a conus projection. Which patient postion and centering point should be used for the image? they both measure spatial resolution in digital imaging - What do limiting spatial resolution and modulation transfer function have in common? 90 degrees and one meter from the pt - Where is the safest place for the radiographer to stand during fluoroscopy? 1.60 mGy - A portable knee exam performed in the operating room results in a beam intensity of 2.5 mGy at 32 inches. What is the intensity of the beam if the same exposure factors are used for a post-operative knee at a distance of 40 inches? 1. average wavelength of the x-ray 2. heat loading on the anode disk 3. patient exposure - When the frequency of the voltage waveform supplied to the x-ray tube is increased, what aspect is reduced? 0.003 mSv - If a radiographer receives an exposure of 0.05 mSv at a distance of 1.5 feet from the tube of a portable x-ray unit, what will the exposure be at a distance of 6 feet from the tube? turn right side closer to IR - A PA chest radiograph demonstrates the left clavicle closer to the center of the spine than the right clavicle. Which action should the radiographer take? OSL - Which type of personnel dose monitoring devices is the best choice to monitor the whole body dosage of radiographers? bring the image intensifier as close as possible to the pt - Which factor will decrease the patient's dose during fluoroscopy? 8, 10, 12, 14 - 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. leakage - Which term describes stray radiation that is emitted through the x-ray tube housing? do not rotate the leg, place the anode end of the tube toward the foot - A radiographer prepares to perform an AP projection of the distal femur on a patient with a suspected femoral fracture. Which represents the best approach for positioning both the patient and the x-ray tube? ceiling - In a typical x-ray examination room, what is considered a secondary protective barrier? asthenic - Which patient body habitus may require the patient to be in the Trendelenburg position during a small bowel series? less than the dose needed to produce apoptosis in slowly dividing cells or non dividing cells - Which radiation dose is required to produce mitotic death? intravenously - How should a drug be administered to get the quickest response? increased mass, decreased penetration - What characteristics do high LET radiations have when compared with low-LET radiation? 1. kVp 2. HVL - Which items can be used as indicators of the quality of the diagnostic x-ray beam? attenuation - What is the term for a reduction in x-ray photon intensity as it passes through the patient? 1. radiologists 2. radiographers 3. quality control technologists 4, ordering physicians - Who judges radiographic images for quality? rotate the head to the right with the chin tilted to the right - Which positioning method is prescribed to demonstrate the right zygomatic arch free of superimposition on an inferosuperior tangential projection? longer exposure time - Which step will reduce digital image noise, assuming no other changes? AP, upright - Which position best demonstrates a posterior rib injury above the diaphragm? 1. thick barium sulfate 2. thin barium sulfate 3. ionic, water soluble 4. carbon dioxide - Place the types of contrast media in order of decreasing opacity.