Science Quiz / Diagnostic Imaging Exam 1

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position the (thick/thin) area under the cathode side
optimal developer temp is __ degrees F
degree of blackness
this surrounds anode/cathode, creates a vacuum so no air molecules are present
electrons are concentrated in a small area of the target called the ____
site of xray generation
T or F: xrays produce a visible image on the film before processing
what percent of the energy produced when electrons hit the target is converted into xrays?
number of protons is (greater, equal, less) number of electrons
electrons that collide with ______ produce xrays
smaller filaments have (smaller/larger) focusing cups
what metal is the focusing cup made of
_____ wavelengths have higher frequencies
type of anode developed to help dissipate the heat generated at the target; can use higher mA's with these
xrays travel in ______ lines
distance between two consecutive corresponding points on a wave
what metal is the window made of that allows xrays to leave the tube and expose the film
what metal is the filament made of?
T or F xrays excite and ionize atoms
the primary machine setting controlling depth of penetration
density difference between two adjacent areas on a radiograph
T or F: there is no limit to how small a focal spot can be
type of anode with limited ability to withstand heat generated by electrons hitting the target
fixer pH is
difference in density and mass between two adjacent anatomic structures
dental units use what type of anode?
the _____ is always positive, the ______ is always negative
xrays make radiographic film _____ (color)
visible difference between two adjacent radiographic densities
hihg frequency type _______ are used in clinics to allow thousands of electrical waves to flow towards the xray tube instead of standard 60 cycle US alternating current
thicker parts absorb (more/less) xrays and make film (darker/lighter)
a ______ transformer reduces incoming line current from amperes down to mA, called the 'low voltage' circuit
xrays are a form of __________; which are bundles of energy that travel in waves
T or F: silver should be disposed of by washing down the drain
part of xray machine that directs electrons towards the light
Stationary base is made of what metal?
(small/large) focal spots are desired because they result in very clear images
The _____ effect is where the intensity of the beam varies and is stronger on the cathode side due to the angle of the target
As the focal spot becomes larger, the image becomes fuzzy and less clear; this is called the _______ effect
number of wave cycles that pass a stationary point in a second
Xrays are bundles of energy called ______ or ______
the kVp selector is also called ___________
xrays are (high/low) frequency waves
what is the viewing contrast desirable for soft tissues (high, low)
the _____ transformer increases the incoming voltage from volts to kilovolts, called 'high voltage' circuit
radiographer can switch filaments by turning the ___ selector
______ wavelengths have more energy
encases entire xray tube to prevent stray radiation escaping and protects glass envelope from damage
number of xrays leaving the tube is determined by what setting?
_______ allow flow of electrons in one direction only
developer pH should be
min dark room size is __ by __ feet

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Created Mar 1, 2012ReportNominate

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