Study Alternate Imaging Test 1 Flash Cards

 
Pile Management Card
Alternate Imaging Test 1

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what is required in xray diagnoses to obtain the required diagnostic information
special equipment
specialized techniques
any machine that is designed to be used exclusively for "in department use" and is manufactured specifically for a desired procedure is called what
permanent equipment
what is similar to intensifying screens that are composed of crystals that cause florescence when struck by xrays.
fluoroscopic screens
what happens to the electrons in a vidacon when approaching the anode
they are decelerated to a near standstill to scan the image perpendicular to the target
to attract the electron beam from the electron gun the anode has a positive potential of how many volts
250 V
in a vidacon where is the cathode located
directly opposite of the target assembly
what is functionally the most important element in the camera of the fluoro machine
target assembly
what are the three layers of the target assembly
glass envelope
signal plate
target assembly
what is it called when optical lenses and mirrors are used to magnify the image from the output phosphor onto a viewing glass
mirror optics system
what is the product of the minification gain and the ratio of the number of light photons at the output phosphor to the input phosphor
brightness gain
what is the positive potential of the accelerating anode
25kVp
what is located in the small neck of the image intensifier
accelerating anode
what maintains a precise electron path from the photocathode to the output phosphor
electrostatic focusing cell
what is it called when cesium iodide and anitomy compound respond to stimulation by light with the emission of electrons
photoemission
what is a thin metal layer that is usually composed of cesium iodide and anitomy compound
photocathode
what separates the input phosphor from the photocathode
thin transparent layer
what is curved to the shape of the glass envelope
input phosphor
what converts an xray image into a visible light image and intensifies brightness of that image
image intensifier
what is it called when visible light is emitted only during the stimulation of the phosphor
fluorescence
what is visible light that continues to be emitted after the outside stimulus has been shut off
phosphorescence
what is the light emitted by a luminescent material in response to outside stimulation
luminescence
what is it called when the light from the phosphor should be of the same wavelength or color to match the sensitivity of the xray film
spectral matching
what is it called when phosphor emits a large amount of light per xray interaction
xray conversion factor
what is the aluminum cup located on the bottom side of the I/I tube and is utilized for palpation and to localize a particular area for examination
compression cup
what is the feature on a fluoro machine that allows the radiologists to select an image brightness that is subsequently maintained automatically by varying the kVp, mAs or sometimes both
automatic brightness control (ABC)
what is a complex electronic device that receives the remnant xray beam and converts it into light and increases the light intensity of the image
intensifier tube
what are the three upgrades of the image intensified fluoroscopy machine
image is observed on a tv monitor via an intensifier tube
the image is brighter
the image is easier to visualize
what has conventional fluoroscopy been replaced with
image intensified fluoroscopy
what is the exposure called that a radiologists may take if something of interest is noted during a fluoro exam
spot film
what is the switch called on the fluoro machine that terminates the exposure
dead man switch
what is the primary function of the fluoro unit
dynamic studies of the motion of internal structures and fluids
what year was the fluoroscope invented
1896
who invented the fluoroscope
thomas edison
what is the most widely used xray machine used in the operating room
C-arm
when using a mobile xray unit in the operating room what consideration must be given
available space
what is the most important thing in the operating theater
location of the exam
what do the applications of the mobile equipment depend upon
type of exam
size and condition of the patient
location of the exam/patient
available units
what are the components of a mobile xray machine
xray tube
batteries
high tension generator
control panel
drive system
what is the typical output of a portable xray machine
up to 300 mA with a max tube voltage of 125 kVp
what type of xray equipment is mounted on wheels and can be pushed by human or mechanicle power with reasonable ease about the hospital
mobile xray unit
what type of xray machine can be carried usually by one person
portable xray machine
what is used when it is necessary to perform xrays on someone who is unable to come to the department
mobile unit
for optimum results exams must be performed where
in the room specifically designed for it
what are the three principal parts of the high voltage section
high voltage step-up transformer
filament transformer
rectifier
what converts low supply voltage into a kilovoltage of the proper waveform and is usually located in a large metal tank in the corner of the room
high voltage section
what usually allows control line compensation
operating console
what part of the exam equipment is most familiar to the tech
operating console
what part of the exam equipment is rarely seen by the tech
xray tube
what are the two primary parts of the xray tube
cathode and anode
what and where is the high voltage generator housed and stored in
in a cubicle container located in the corner of the examining room
what seperates the head of the xray tube and the control console
a protective lead wall with a viewing lead window
are the control console and the head of the xray tube located in one room or two
two
what are the three principal parts of an xray machine
xray tube
high voltage generator
control console
where is the fluoro xray tube usually located in a modern general purpose xray room
under the exam table
what does a modern general purpose xray room usually contain
radiographic unit and a fluoroscopic unit with an I/I tube
what are examples of dedicated machines
fluoro room
general radiographic room
dedicated chest unit
dedicated head unit
tomographic room
mammo unit
special studies suite
CT
MRI
what tube current do therapeutic xray machines not exceed
20 mA
what are the max voltages and tube currents diagnostic xray machines usually operate at
25-150 kVp
100-1200 mA
what are xray machines usually identified according to
the energy of the xrays they produce
the purpose for which those xrays are intended
what are examples of exams that do not require alternate imaging
KUB
IAC- internal auditory canals
carpal tunnel study
TMJ- temporal mandibular joint
what procedure uses a CT scanner to visualize the brain and contrast agents to visualize the vessels of the brain
computerized cranial tomography
what procedure uses a xerox process to differentiate the differences between muscle, fat and possible lesions of the breast
xeromammography
what procedure uses iodine based medias that accumulate in the gallbladder to help visualize this structure
oral cholecystogram
what procedure uses barium or gastografin to visualize anatomy and detect abnormalities along the digestive tract
upper and lower G.I. studies
uses magnetic fields and radiowaves while avoiding slight risk that accompanies low radiation doses of CT and conventional radiography
magnetic resonance imaging (MRI)
detectors and components used to reconstruct an image from a collimated xray beam displayed onto a TV Monitor
computerized tomography (CT)
very small current that continually flows through any circuit that inhibits any helpful diagnostic information
image noise (mottle)
use of photoconductive material and a dry processing technique to produce an electrostatic latent image
xeroradiography
what is a movie camera connected to an image intensifier tube to record a given procedure on 16mm, 35mm, or 105mm film called
cinefluorography
what is taking static images during fluoroscopy called
spot film radiography
what type of modality is used with image intensifiers in conjunction with TV cameras and monitors to image the organs and vessels of the body.
image intensified fluoroscopy
procedures are designed to visualize anatomical structures more clearly, usually at the expense of what
non visualization of other structures
modalities other than conventional radiography used to image the body
alternate imaging
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