Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
65 Cards in this Set
- Front
- Back
|
Electrons possess the energy desribed as "the ability of a moving body to do work"
a.static energy b.potential energy c.kinetic energy d.wave energy |
c. kinetic energy
|
|
|
The process by which an image of the contrast media filled anatomy difference between two similar images is extracted is referred to as:
a. quantization b. digitization c. subtraction (DSA) d. transformation |
C. subtraction
|
|
|
the purpose of rating charts and cooling curves is to determine safe exposure factors for an x-ray tube.
a. charts are generic and may be used for any tube b. specific charts available for each tube and should be used accordingly |
b. specific charts are available for each tube and should be used accordingly
|
|
|
the rage of exposures a digital radiographic system can retain to create the visible image is:
a. dynamic range b. matrix size c. histogram d. spatial resolution |
a. dynamic range
|
|
|
leakage radiation refers to:
a. isotropic emissions b. xrays that escape through the protective housing c. to those x-rays emitted through the window d.those xrays passing only through the second set of shutters |
b. x-rays that escape through the protective tube housing
|
|
|
the most common cause of tube failure:
a. is the buildup of vaporized tungsten on internal components b. is a cracked filament c. is a broken or chipped glass envelope d. is a wobbling bearing in the target |
a. the buildup of vaporized tungsten on internal components
|
|
|
most rotating anodes revolve at approximately ____ rpms.
a.100 b. 1100 c. 3400 d. 5500 |
c. 3400
|
|
|
Which of the following numbers is the same as 10 to the 6th power?
a. 10 b. 100 c. 1,000 d. 1,000,000 |
d. 1,000,000
|
|
|
An electrical charge can be neutralized if it is conducted to what?
a. ground b. a metal pipe c. a magnet d. a battery |
a. ground
|
|
|
What is the device that stores electrical charges?
a. capacitor b. ammeter c. voltmeter d. ground |
a. captacitor
|
|
|
Which of the following will create the most electrical resistance?
a. a long wire with a small diameter b. a short wire with a small diameter c. a long wire with a large diameter d. a short wire with a large diameter |
a. a long wire with a small diameter
|
|
|
A material that prevents the flow of electrons is a/an:
a. conductor b. insulator c. capacitor d. battery |
b. insulator
|
|
|
According to Ohm's Law, what would the voltage be if the resistance is 2 Ohms and the current is 4 amperes?
a. 2 volts b. 4 volts c. 8 volts d. 10 volts |
c. 8 volts
|
|
|
A device used to vary electrical resistance
a. breaker switch b. rheostat c. transformer d. rectifier |
b. rheostat
|
|
|
Which of the following moves in a conductor?
a. positive charges b. negative charges c. neutral charges d. atomic nuclei |
b. negative charges
|
|
|
A technique of 70kVp at 400mA produces how many watts of power?
a. 280 watts b. 2800 watts c. 28,000 watts d. 280,000 watts |
c. 28,000 watts
|
|
|
Setting the exposure factors of mAs and kVp will affect the __ circuit.
a. filament b. tube (main) c. rotor d. rectifier |
b. tube (main)
|
|
|
Maximum induction will occur when a conductor cuts a magnetic field at what angle?
a. 0 degrees b. 45 degrees c. 90 degrees d. 180 degrees |
c. 90 degrees
|
|
|
As magnetic domains rearrange in a transformer, heat is produced. This describes:
a. copper losses b. eddy currets c. hysterisis losses d. energy swells |
c. hysterisis losses
|
|
|
What device allows current to flow in only direction?
a. insulator b. conductor c. semiconductor d. capacitor |
c. semiconductor
|
|
|
Which of the following is the most accurate timer?
a. impulse b. synchronous c. sine-wave d. electronic |
d. electronic
|
|
|
Why are 3 phase generators more efficient at producing x-rays?
a. shorter times are possible b. voltage never drops to zero c. current travels faster d. less heat units are produced |
b. voltage never drops to zero
|
|
|
Off focus (extra focal) radiation is minimized by the __ of the variable aperture collimator.
a. mirror b. inherent filtration c. first set of lead shutters d. second set of lead shutters |
c. first set of lead shutter
|
|
|
what are xray tubes called that have two filament wires?
a. dual focus tubes b. double cathode tubes c. triode tubes d. field emission tubes |
a. dual focus tubes
|
|
|
how many kilovolts is equal to 75,000 volts
a. 7.5 kV b. 75 kV c. 750 kV d. 75,000 kV |
b. 75 kV
|
|
|
According to the line focus principle, the effective focal spot is __ than the actual focal spot.
a. smaller b. larger c. brighter d. sharper |
a. smaller
|
|
|
In a modern, rotating anode xray tube, which of the following will coat the tungsten disk?
a. tungsten rhenium alloy b. tungsten molybdenum alloy c. tungsten copper allow d. tungsten lead alloy |
a. tungsten rhenium alloy
|
|
|
Which of the following would describe a high speed bundle of energy?
a. photon b. proton c. quantum d. A and C |
d. A and C
|
|
|
As wavelength of an xray increases, what happens to its frequency?
a. increases b. decreases c. changes direction d. remains the same |
d. decreases
|
|
|
Which of the following results in the total absorption of the primary xray photon?
a. compton scattering b.classical scattering c. pair production d. photoelectric effect |
d. photoelectric effect
|
|
|
The half value layer is an expression of the __ of an xray beam.
a. quantity b. quality c. refraction d. ionization |
b. quality
|
|
|
What is the term used to describe an xray beam that is reduced in intensity as it traverses an object?
a. ionization b. attenuation c. quantization d. elimination |
b. attenuation
|
|
|
Which of the following types of primary radiation cannot be produced at tube potentials less than 70 keV when using a tungsten target?
a. Brems b. Characteristics c. primary d. secondary |
b. characteristic
|
|
|
What time of radiation is produced when a high speed electron is slowed down?
a. brems b. characteristic c. exit d. scattered |
a. Brems
|
|
|
What is the energy called that attracts the electrons to the nucleus of an atom?
a. natural energy b. nuclear energy c. binding energy d. electron energy |
c. binding energy
|
|
|
What is the normal tube current during conventional fluoro?
a. less than 5mA b. 5-10 mA c. 50-100 mA d. 100-500 mA |
a. less than 5 mA
|
|
|
What conversion occurs in the image at the input phosphor of an image intensifier tube?
a. light is converted to electrons b. xrays are converted to electrons c. electrons are converted to visible light d. xrays are converted to visible light |
d. xrays are converted to visible light
|
|
|
What are the functions of the electrostatic lenses in an image intensifier?
1. focus the electrons from the photocathode 2. increase the speed of the electrons 3. condense the image to increase its brightness a. 1&2 only b. 1&3 only c. 2&3 only d. 1,2 &3 |
d. 1, 2 & 3
|
|
|
What is the process called when an image intensifier tube makes a dim image brighter?
a. brightness gain b. flux gain c. modification gain d. magnification gain |
a. brightness gain
|
|
|
The input phosphor of the image intensifier differs from the output phosphor in what way?
a. is much larger b. emits electrons, where the output phosphor emits light c. absorbs electrons, where the output phosphor absorbs light d. is a fixed size, where the output phosphors size can vary |
a. is much larger
|
|
|
Which of the following statements about informed consent is NOT true.
a. only the physician named on the form may perform the procedure b. only parents or legal guardians ma sign for a minor c. signed forms may be filed in after the procedure is completed d. patients must sign the form after an explanation of the procedure but before sedation is given |
c. signed forms may be filled in after the procedure is completed
|
|
|
which of the following does NOT represent a responsibility of the radiographer?
a. providing the patient with considerate and respectful care b. avoidance of discrimination in professional practice c. keeping patient information confidential d. providing patients with complete and accurate information regarding diagnosis and treatment |
d. providing patients with complete and accurate info regarding diagnosis and treatment
|
|
|
which of the following organizations provides accreditation for health care institutions?
a. ASRT b. OSHA c. JRCERT d. TJC |
d. TJC
|
|
|
when a hospital radiographer innocently commits an error as the result of following the orders of an attending physician, the physician may be held responsible according to the :
a. doctrine of borrowed servant b. rule of professional responsibility c. doctrine of respondent superior d. doctrine of non compos mentis |
a. doctrine of borrowed servant
|
|
|
the term ethics refers to:
a. moral principles or values b. legal responsibility c. the need for condidentiality d. professional liability |
a. moral principles or values
|
|
|
if a patient refuses an exam and wishes to leave, but isnot allowed to do so, the radiographer who restrains the patients may be liable for charges of:
a. false imprisonment b. battery c. invasion of privacy d. libel |
a. false imprisonment
|
|
|
In a slider board transfer, the patient is helped to:
a. slide to his or her feet at the side of the bed b. turn over in bed c. lie directly on the board and then slide across to the stretcher d. slide on a draw sheet across the board to another surface |
d. slide on a draw sheet across the board to another surface
|
|
|
if a radiographer attemps to gain a patient's cooperation by threatening harm, this offense is termed:
a. invasion of privacy b. battery c. slander d. assault |
d. assault
|
|
|
a tort is a(n)
a. civil wrong b. felony c. award for victims of negligence d. misdemeanor |
a. civil wrong
|
|
|
Res ipsa loquitur means:
a. at the location specified in the complaint b. let the master respond c. the thing speaks for itself d. both parties are partially at fault |
c. the thing speaks for itself
|
|
|
A law enacted under the US department of health and human services (HHS) to protect the privacy rights of patients is called the :
a. Health Insurance Portability and Accountablitity Act (HIPAA) b. consumer assurance of radiologic ecellence (CARE) c. Healthcare privacy act (HPA) d. Privact and confidentiality assurance act (PCAA) |
a. Health Insurance Portability and Accountability Act (HIPAA)
|
|
|
A sensitivity to the needs of others that allows youto meet those needs constructiely is characteristic of:
a sympathy b. empathy c. self-actualization d. objectivity |
b. empathy
|
|
|
the first pjase of experience in the grieving process is usually the stage of:
a. depression b, anger c. denial d. acceptance |
c. denial
|
|
|
Patients who suffer from orthopnea need to have :
a. padding under bony prominences b. their heads elevated in order to breathe c. their feel elecated to relieve pain d. a skin graft |
b. their heads elevated in order to breathe
|
|
|
the term recumbent refers to a position in which the patient is:
a. seated b. lying down c. upright d. supine with head elevated |
b. lying down
|
|
|
Which of the following statements does not apply to the rules of body mechanics?
a. use a wide base of support b. keep your load out beyond the front of your body c. bend your knees when you lift heavy objects d. avoid pulling or lifting heavy objects |
b. keep your load out beyond the front of your body
|
|
|
the practice of separating infectious patients from others and carefully controlling items that come in contact with these patients is called
a. microbial dilution b. surgical asepsis c. environmental asepsis d. isolation technique |
d. isolation technique
|
|
|
which of the following are NOT microorganisms
a. bacteria b. viruses c. protozoa d. fomites |
d. fomites
|
|
|
treatment used to make an item germ-free is called
a. asepsis b. disinfection c. mircrobial dilution d. sterilization |
d. sterilization
|
|
|
a patient diagnosed with a contagious respiratory infection is being transported to the radiology department. which of the following must be done to prevent transmission of the patient's infection?
a. the pt must wear a mask b. the radiographer must wear a mask c. the patient must wear an isolation gown d. the radiographer must wear gloves |
a. the patient must wear a mask
|
|
|
when opening a sterile pack, the first corner of the wrap is opened:
a. toward you b. away from you c. to the left d. to the right |
b. away from you
|
|
|
what is the body's first line of defense against infection>
1. intact skin and mucous membranes 2. upper respiratory tract cilia 3. inflammatory response a. 1 only b. 1 and 2 only c. 1 and 3 only d. 1,2 and 3 |
b. 1 and 2 only
|
|
|
failing to disinfect the xray table or vertical bucky between patients spreads microorganisms via the __ route
a. airborne b. vehicle c. fomite d. direct contact |
c. fomite
|
|
|
nosocomial infections are those that are contracted:
a. from contaminated water b. from and occupational enviroment c. within a hospital d. with poor hygiene |
c. within a hospital
|
|
|
the transport of microorganisms by means of contaminated food, water, drugs or blood is referred to as a :
a. reservoir b. fomite c. vehicle d. vector |
c. vehicle
|
