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A collection of actual exam questions and answers for the lmrt arrt exam, covering key concepts in radiologic technology. It offers a valuable resource for students preparing for the exam, providing insights into the types of questions they can expect and the knowledge required to succeed. Topics such as x-ray production, radiation safety, image quality, and patient care.
Typology: Exams
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If the mAs is doubled, the dose to the patient will? - ANSWERS-double The principal means of controlling involuntary motion is to - ANSWERS-use ashort exposure time
A doubling in kVp would result in four times more x-rays being emitted from thetube - ANSWERS-True
if the sid is increased or decreased, the density on the image is not changed -ANSWERS-false
The contrast on the viewing monitor is adjusted by controlling the windowlevel. - ANSWERS-false
The SHARPNESS in the radiographic image is referred to as spatial resolution -ANSWERS-true
The majority of photons in the X-ray beam are created by which process? -ANSWERS-Bremsstrahlung interactions
More than 99% of the energy of the electron stream is converted into: -ANSWERS-heat
the high-speed rotation (10,000 rpm) of the anode enables - ANSWERS-Greaterdissipation of heat from high technical factors
The degree of angulation of the x-ray tube target will determine the: -ANSWERS-size of the actual and effective focal spot
A dual-focus X-ray tube has: 1: Two filaments2: Two focal spot sizes 3: Two anodes - ANSWERS-1 and 2
3: increased radiographic density - ANSWERS-1, 2, and 3 The unit used to indicate the total quantity of X-ray expose is - ANSWERS-Millionsampere-seconds (mAs)
The device for removing long-wavelength radiation from the primary X-raybeam is the - ANSWERS-Filter
X-ray equipment capable of producing 70 kVp or more is required to have totalfiltration of at least: - ANSWERS-2.5 mm Al equiv
The purpose of rotating the anode of the X-ray tube is to - ANSWERS-Increasethe heat capacity of the anode
Image sharpness is determined by the - ANSWERS-Size of the effective focalspot
Above 70 kVp, what percentage of photons is created by the bremsstrahlungprocess? - ANSWERS-85%
The amount detail seen in the X-ray image is referred to as - ANSWERS-spatialresolution
Of what material is the filament made? - ANSWERS-Tungsten
Of what material is the target/anode made? - ANSWERS-Tungsten What is added to port to remove the long-wavelength radiation? - ANSWERS-aluminum filtration
What is the term used to describe the heating of a element to a hottemperature and the expanding of the electrons in a atom? - ANSWERS- Thermionic emission The cathode side of the X-ray tube is - ANSWERS-Negative The anode side of the X-ray tube is - ANSWERS-Positive What are the two rotation speeds for the anode? - ANSWERS-3,600 rpm and10,000 rpm
What type of radiation production makes up the greatest portion of the X-raybeam- bremsstrahlung or characteristic? - ANSWERS-Brehmsstrahlung
How much aluminum filtration must be in the x-ray tube to meet governmentstandards? - ANSWERS-2.5mm Al equiv
Which of the following is considered an observable short term effect ofradiation exposure - ANSWERS-erythema
The annual effective dose for a whole body non pregnant workers over the ageof 18 - ANSWERS-50 (mSv)
Which of the following changes will decrease patient dose - ANSWERS-High kVp A pregnant radiation workers monthly equivalent dose limit is - ANSWERS-0.5mSv
Spatial resolution is the new digital term used to describe the ______ of thestructures recorded in the image, generally speaking it simply means to the amount of DETAIL seen on the visible image - ANSWERS-Sharpness X-ray tubes rotate at a standard speed of about ______ during exposure -ANSWERS-3600 rpm
Most X-ray tubes in use today have high speed rotation at - ANSWERS-10,000rpm
The __________ is used to rotate the anode - ANSWERS-Electromagneticinduction motor
The process of changing Alternating Current (AC) into Direct Current (DC) -ANSWERS-Rectification
Above 70 kVp, about 15% of the beam is? - ANSWERS-Characteristic The German word that means braking and slowing? - ANSWERS-Bremsstrahlung Every x-ray exposure will contain photons produced from bremsstrahlunginteractions
Below 70 kVp, about what percentage is the beam is brems? - ANSWERS-100% Every x-ray exposure will contain photons produced from bremsstrahlunginteractions
Above 70 kVp, about what percentage is the beam is brems? - ANSWERS-85% For Characteristic radiation to be created Above 70 kVp, about what percentageof the beam is characteristic? - ANSWERS-15%
Created when an incoming electron interacts with the k-shell electron andknocks it out of its orbit. When the electron void is filled with an outer shell electron an x-ray photon is created
Occurs at energy levels throughout the diagnostic xray range of 40 to 125 kVp -ANSWERS-Compton scatter
Occurs when an xray photon collides with an inner shell orbital electron of anatom. the photons energy is absorbed into the process of rejecting the electron
Disease transmissionit is spread by dust containing either Endospores or droplet nuclei - ANSWERS- Airborne contamination Disease transmission an object that has been in contact with pathogenic organisms called
examples it is commonly on xray table, up right Bucky, etc. - ANSWERS-Fomites Disease transmissionan arthropod examples insect, spider, or similar form. mosquitoes, fleas - ANSWERS-Vectors Often occurs when an infectious individual coughs, sneeze, speaks, or sings I amparticles are suspended in the air - ANSWERS-Droplet contamination
The first route is by means of direct contact this transition mode touched byinfected person in such a manner that the organisms are placed in ________ contact with susceptible host - ANSWERS-Direct contact The hepatitis B virus is spread through contact with - ANSWERS-Contaminatedblood, blood products
These types of hepatitis that are spread through contact with food or watercontaminated feces or type - ANSWERS-A and E
Vaccine is available to protect healthcare workers from infection by whichhepatitis virus? - ANSWERS-B
If a patient complains of sudden, intense pain under the sternum, you shouldassume until proven otherwise that the patient might be having a - ANSWERS- Heart attack
Malicious spreading usually refers to written information - ANSWERS-Libel Malicious spreading of information spread verbally - ANSWERS-Slander Consist of an unlawful touching of a person without consent - ANSWERS-Battery Maybe defined as the threat of touching in an injurious way - ANSWERS-Assault The unjustifiable detention of a person against his or her well - ANSWERS-Falseimprisonment
The diabetic patient who has taken insulin but no food may develop -ANSWERS-Hypoglycemia
What's a DNR order? - ANSWERS-A do-not-resuscitate (DNR) order is an ordernot to administer CPR in the event of cardiac or respiratory arrest.
Below 70 kVp, about what percentage of the beam is bremss - ANSWERS-100% The unit used to indicate the total QUANTITY of x-rays in an exposure is -ANSWERS-milliampere-seconds (mAs)
which of the following will result in increased radiographic density?
the primary factor controlling radiographic CONTRAST and x-ray penetration is -ANSWERS-kVp
High contrast produced by using LOW kVp results in an image with: - ANSWERS-a Short scale of contrast
Low contrast produced by High kVp results in an image with - ANSWERS-long-scale contrast
Generalized unwanted exposure on the image is called: - ANSWERS-Fog A decrease in SID will result in: - ANSWERS-increased magnification
one means of controlling distortion is by controlling the - ANSWERS-motion increased quantum mottle will result in increased spatial resolution - ANSWERS-false
Radiation produced by the photoelectric effect is called: - ANSWERS-secondaryradiation
The most effective method of reducing scattered radiation fog on a radiographicis to - ANSWERS-use a grid or buck
As the kVp is increased, the photoelectric effect - ANSWERS-is decreased As the kVp is increased, the Compton effect - ANSWERS-is increased When a body part is dense, or has a greater atomic number, scatter radiation: -ANSWERS-is decreased
in the diagnostic range of kVp settings ( 50 to 100 kVp), the majority ofscattered radiation will be from which interaction with matter? - ANSWERS- Compton effect
Total absorption of an x-ray photon by the atom of the body part is termed -ANSWERS-the photoelectric effect
The majority of photons that are scattered will scatter in what direction -ANSWERS-in a more forward direction
The principal source of scatter radiation is the: - ANSWERS-patient A grid is used when the body part become larger than - ANSWERS-10 to 12 cm The quality control test of the collimator field and x-ray field must show that thetwo field are within 2% of the SID - ANSWERS-True
as the kVp is increased, the Compton effect is increased - ANSWERS-True As the kVp is increased, the photoelectric effect is increased - ANSWERS-False The production of scatter results in fog on the radiograph - ANSWERS-true Electrons that are ejected out of atoms. Photon is absorbed. what effect is this -ANSWERS-Photoelectric Effect
