Flashcards in August 2014 Deck (77):
The formula rad x QF is used to calculate the:
Which of the following does NOT protect the patient by limiting the volume of tissue being exposed?
B. Cylinder cone
C. Aperture diaphragm
What term refers to the radiation that is produced when an electron moves from an outer shell to fill a vacancy in an inner shell?
Occupational radiation monitoring is required when it is likely that an individual will receive ______ in any single year.
Which of the following may result in reduced radiation dose to the patient?
2. Slow film/screen speed
3. Lowest mAs possible
Secondary barriers are not designed to protect people from:
The primary beam
Which of the following would allow an individual to survive larger amounts of radiation?
C. Both A & B
D. None of the above
Protraction and Fractionation
What happens when a state is considered to be an "agreement state" with the NRC?
Radiation protection regulations are enforced by state
Attenuation of a diagnostic x-ray beam is the result of which of the following?
1. Photoelectric effect
2. Compton effect
3. Pair production
Photoelectric and Compton
Which of the following radiation induced effects would require a threshold dose?
A. Acute radiation syndrome
B. Radiation induced leukemia
C. Genetic effects of radiation
D. None of the above
Acute radiation syndrome
Which of the following would result in the greatest increase in patient exposure?
A. Use of 100 speed screens instead of 200 speed screens
B. Adjusting collimation from a 10x12 field to an 8x10 field
C. Increasing the kVp and decreasing the mAs to maintain exposure to the IR
D. Utilizing an 8:1 grid instead of a non-grid technique
Utilizing an 8:1 grid instead of a non-grid technique
The protective curtain on the fluoroscope between the patient and the radiographer protects:
The radiographer from scatter radiation
Patient dose will increase during cine fluoroscopy with a ____.
Smaller field of view and an increased number of frames per second
Which of the following devices is not considered a personnel monitoring device?
A. Geiger-Müller counter
B. Optically stimulated luminescent dosimeter
C. Pocket dosimeter
D. Thermoluminescent dosimeter
What is the most effective way to reduce the dose to a radiographer in the exam room during a fluoroscopic exam?
Doubling distance from fluoroscopic table
Which photon-tissue interactions results in the production of a recoil electron?
Which of the following would have the longest wavelength?
A. Gamma radiation
B. Diagnostic x-rays
C. Cosmic radiation
D. Visible light
Thyroid shields worn during fluoroscopic procedures should be ____ lead one lead equivalent.
Effective dose is partially based on:
The radiosensitivity of various tissues and organs
How frequently should the lead aprons be checked for holes and cracks?
The detector array ______ in a cassette-less digital system.
Converts remnant x-rays to an electronic signal
What supplies free electrons for x-ray production?
The ______ operates on the principle of self-induction .
The amount of current needed to heat the filament in an X-ray tube is:
This type of system does NOT require analog to digital conversion.
The image on the output phosphor of an image intensifier is:
1. Brighter than the input phosphor
2. Dimmer than the input phosphor
3. Larger than the input phosphor
Brighter than the input phosphor
With an AEC device:
A backup timer is required
300 mA 400 mA
.01 second ____mA
200 film/screen speed 100 film/screen speed
80 kVp 70kvp
400 mA _____ mA
1/5 second 1/10 second
60 kVp 70 kVp
8:1 grid 5:1 grid
50 mA 300mA
.30 second _____ second
100 film/screen speed 200 film/screen speed
5:1 grid 8:1 grid
100 mA 300 mA
1/5 second _____ second
90 kVp 104 kVp
50" SID 72" SID
Final image contrast in a digital system is primarily influenced by:
Which of the following choices represents a compensating filter?
B. Added filter
C. Inherent filter
D. Aluminum wedge filter
Aluminum wedge filter
Which of the following exposure factors would produce the shortest scale of contrast for a radiograph of the abdomen?
A. 200 mA 1/4 sec 72 kVp 6:1 grid 200 film/screen speed
B. 100 mA 1/2 sec 90 kVp 6:1 grid 100 film/screen speed
C. 400 mA 3/4 sec 76 kVp 5:1 grid 50 film/screen speed
D. 300 mA 1/5 sec 80 kVp 6:1 grid 100 film/screen speed
Chemical fog can be caused by:
Increased developer temperature
Increased developing time
In a CR system, sampling frequency and pixel pitch are used to determine :
In which of the following ranges would an increase in 10 kVp have the least effect on the exposure to the IR?
A. 51-60 kVp D. 81-90 kVp
B. 61-70 kVp E. 91-100 kVp
C. 71-80 kVp
Histogram analysis errors in a cassette-based system can be attributed to:
Ton compensate for excessive OID, the SID should:
The most commonly used filter for a darkroom safelight is:
Employing the correct _____ is one of the two most effective ways to control the effect of scatter on a digital image.
Decreasing the OID will result in REDUCTION of:
The various densities of the part being radiographed will affect:
1. Exposure to the IR
2. Radiographic contrast
3. Differential absorption
The wide _____ in digital imaging allows more anatomic information to be captured and displayed.
Which position/projection best demonstrates the left kidney in profile and the entire right ureter for intravenous urography?
Spina bifida results from:
Failure of the lamina to unite
The medial articulation of the head of the radius is with the:
The mitral valve is situated between the:
Left atrium and left ventricle
Which of the following structures is located most anterior in the abdomen?
C. Transverse colon
D. Inferior vena cava
The degree of angulation between the petrous pyramids and the median sagittal plane of a mesocephalic shaped skull is approximately:
In order to best demonstrate the greater tubercle of the humerus free of superimposition, a plane passing through the epicondyles should:
Be perpendicular with the central ray
Which of the following structures of the thoracic vertebrae would articulate with the anterior end of the rib?
B. Transverse process
D. None of the above
None of the above
An AP projection of the foot could also be termed:
Which of the following bones from the foramen magnum?
1. Occipital bone
2. Temporal bone
3. Sphenoid bone
The term that most accurately describes the movement of the foot when turned inward at the ankle joint is:
The central ray for an AP projection of the knee should enter:
1 cm inferior to the apex of the patella
The number of ribs that should be demonstrated above the diaphragm on a chest radiograph with proper inspiration would be:
Lateral deviation of the nasal septum could best be demonstrated utilizing the:
Parietoacanthial projection Waters method
Which projection would provide maximum demonstration and closest placement to the film of the right intervertebral foramina of the cervical vertebrae?
Right anterior oblique position (RAO)
The cuboid lies on the _____ side of the foot.
The outer layer of the meninges is the:
If the orders for a patient state that they are NPO this means:
Nothing should be given by mouth
Which of the following contraindicate the use of iodine contrast agents?
A. Multiple myeloma
B. Creatinine level of 2.8
C. BUN level of 35 mg/dl
D. All of the above
E. None of the above
All of the above
The vital sign that most accurately indicates that a patient is in shock is:
What is the best method to transfer a very obese patient from a wheelchair to the x-ray table if the patient is unable to bear weight on either leg?
Use a hydraulic lift
The rule for restraining pediatric patients is:
Restrain children only when necessary
The ____ is responsible for addressing possible adverse effects of a procedure as well as alternate diagnostic tests.
Which transmissions would apply to microorganisms spread by contaminated water?
Common vehicle transmission
A radiographer observes that a patient's IV site has become swollen and puffy. The radiographer should:
Clamp off the IV
Nasogastric and nasoenteric tubes are used for:
3. Radiographic examinations
The term that the CDC currently uses to describe isolating patients with known infection is:
Transmission based precautions
Sterile trays may have an indicator that changes colors when sterilization has occurred. What type of sterilization process uses this type indicator?
What is an example of verbal communication?
Asking the patient for their symptoms
The term _______ refers to the process of performing initial examinations and assigning a priority for further care of disaster victims.
Which of the following choices represents a standard principle of surgical asepsis?
1. Never leave a sterile area unattended
2. Never reach across a sterile field
3. You may pass between the physician and the sterile field if needed
The type of microorganism that causes tuberculosis is a/an: