PHYSICS-denh
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| WHAT IS THE SMALLEST PARTICLE OF SUBSTANCE? | MOLECULE WHICH IS CAPABLE OF INDEPENDENT EXISTENCE AND IS COMPOSED OF ATOMS
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| WHAT IS TE COMPOSITION OF AN ATOM? | NUCLEUS-PROTON(+), NEUTRON(0 CHARGE) & ELECTRON(-)
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| WHAT SHELL IS CLOSEST TO THE NUCLEUS? | K SHELL, HIGH ENERGY PHOTON ARE REQUIRED TO REMOVE ELECTRONS
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| WHAT IS IONIZING RADIATION? | PRODUCTION OF ION BY ADDING OR REMOVING ELECTRON TO ATOM
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| WHAT ARE THE 2 TYPES OF IONIZING RADIATION? | PARTICULATE AND ELECTROMAGNETIC
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| WHAT IS PARTICULATE RADIATION? | DECAYING SUBSTANCES: PARTICLES THAT POSSESS MASS, TRAVEL IN STRAIGHT LINES, TRAVEL AT HIGH SPEEDS, TRANSMIT KINETIC ENERGY
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| WHAT IS ELECTROMAGNETIC RADIATION? | X-RAYS, GAMMA RAYS, ETC: WAVELIKE MOVEMENT, W/O MASS, POLYCHROMATIC
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| WHAT IS THE DIFFERENCE BETWEEN X-RAYS AND GAMMA RAYS? | X-RAYS SOURCE IS ELECTRONS WITHIN X-RAY TUBE, EMITTED DURING DECELERATION OF HIGH ENERGY ELECTRONS; GAMMA RAYS SOURCE IS RADIOACTIVE MATERIAL, THOUGH HAS SAME WAVELENGTH AS X-RAYS
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| WHAT IS X-RADIATION? | HIGH ENERGY, IONIZING, ELECTROMAGNETIC RADIATION: SHORT WAVELENGTH, HIGH FREQUENCY, AND HAVE PHOTON ENERGY
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| WHAT HAPPENS IF YOU DECREASE WAVELENGTH? | INCREASE FREQUENCY, INCREASE ENERGY, INCREASE PENETRATION
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| WHAT OCCURS TO HIGH ATOMIC # DURING X-RADIATION? | INCREASE THICKNESS & DENSITY = INCREASE ABSORPTION
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| WHAT ARE X-RAYS? | BUNDLES F ENERGY WITH 0 CHARGE, TRAVEL IN WAVES, HAS NO MASS, AND CAN CAUSE BIOLOGICAL CHANGES IN LIVING THINGS
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| WHAT ARE THE COMPONENTS OF X-RAY TUBES? | VACUUM TUBE, (1)HIGH VOLTAGE, (2)SOURCE OF ELECTRONS, (3)TARGET/FOCAL SPOT, FILTRATION, COLLIMATION, PRIMARY BEAM
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| WHAT IS THE IDEAL KVP? | 65-100; AFFECTS QUALITY BY CONTROLLING VOLTAGE
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| WHAT IS THE SOURCE OF ELECTRONS? | MADE OF TUNGSTEN; MA CONTROLS AMT OF CURRENT/# OF ELECTRONS
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| WHAT IS THE IDEAL MA? | 5-15
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| WHAT IS THERMIONIC EMISSION EFFECT? | ELECTRON CLOUD; BOILING OFF OF ELECTRONS FROM THE FILAMENT
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| WHAT IS THE TARGET/FOCAL SPOT? | MADE OF TUNGSTEN, STOPS ELECTRONS
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| WHEN ELECTRONS STRIKE TARGET, ENERGY PRODUCES WHAT? | 1% X-RAYS & 99% HEAT
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| WHAT DISSAPATES HEAT GENERATED? | COPPER SLEEVE & OIL
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| WHAT DOES FILTRATION DO? | REMOVES LONG, NON-PENETRATING WAVES FROM HETEROGENEOUS X-RAY BEAM: ALUMINUM DISK 1.5-2.5 MM
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| WHAT DOES COLLIMATION DO? | LEAD DIAPHRAM WITH A HOLE, RESTRICTS SIZE AND SHAPE OF BEAM, CIRCULAR OR RECTANGULAR, FED.REGULATION - 2.75 INCH BEAM
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| WHAT IS THE USEFUL BEAM? | PRIMARY BEAM -> FILTRATION + COLLIMATION
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| WHAT ARE THE TWO ELECTRODES IN THE X-RAY TUBE? | ANODE(+) AND CATHODE(-)
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| EFFECTIVE FOCAL AREA IS SMALLER THAN ____ FOCAL AREA | ACTUAL
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| ELECTRONS VEER OFF COURSE, DUE TO A REDUCTION OF SPEED ARE REFERRED TO AS? | BREMSSTRAHLUNG
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| BLOCKING CURRENT DURING 1/2 OF A CYCLE IS CALLED? | RECTIFICATION
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| WHAT COMPONENT DIRECTS ELECTRONS TOWARD THE TARGET? | FOCUSING CUP
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| THE PID STANDS FOR | PATIENT INDICATOR DEVICE
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| THE X-RAY MACHINE OPERATES ON AN ELECTRIC CURRENT THAT HAS HOW MANY CYCLES/SEC? | 60
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| X-RAYS LEAVE THE TUBE THROUGH WHAT? | PORTE
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| THE CENTER OF THE X-RAY BEAM IS CALLED? | CENTRAL RAY
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