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PHYSICS-denh

QuestionAnswer
WHAT IS THE SMALLEST PARTICLE OF SUBSTANCE? MOLECULE WHICH IS CAPABLE OF INDEPENDENT EXISTENCE AND IS COMPOSED OF ATOMS
WHAT IS TE COMPOSITION OF AN ATOM? NUCLEUS-PROTON(+), NEUTRON(0 CHARGE) & ELECTRON(-)
WHAT SHELL IS CLOSEST TO THE NUCLEUS? K SHELL, HIGH ENERGY PHOTON ARE REQUIRED TO REMOVE ELECTRONS
WHAT IS IONIZING RADIATION? PRODUCTION OF ION BY ADDING OR REMOVING ELECTRON TO ATOM
WHAT ARE THE 2 TYPES OF IONIZING RADIATION? PARTICULATE AND ELECTROMAGNETIC
WHAT IS PARTICULATE RADIATION? DECAYING SUBSTANCES: PARTICLES THAT POSSESS MASS, TRAVEL IN STRAIGHT LINES, TRAVEL AT HIGH SPEEDS, TRANSMIT KINETIC ENERGY
WHAT IS ELECTROMAGNETIC RADIATION? X-RAYS, GAMMA RAYS, ETC: WAVELIKE MOVEMENT, W/O MASS, POLYCHROMATIC
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
WHAT IS X-RADIATION? HIGH ENERGY, IONIZING, ELECTROMAGNETIC RADIATION: SHORT WAVELENGTH, HIGH FREQUENCY, AND HAVE PHOTON ENERGY
WHAT HAPPENS IF YOU DECREASE WAVELENGTH? INCREASE FREQUENCY, INCREASE ENERGY, INCREASE PENETRATION
WHAT OCCURS TO HIGH ATOMIC # DURING X-RADIATION? INCREASE THICKNESS & DENSITY = INCREASE ABSORPTION
WHAT ARE X-RAYS? BUNDLES F ENERGY WITH 0 CHARGE, TRAVEL IN WAVES, HAS NO MASS, AND CAN CAUSE BIOLOGICAL CHANGES IN LIVING THINGS
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
WHAT IS THE IDEAL KVP? 65-100; AFFECTS QUALITY BY CONTROLLING VOLTAGE
WHAT IS THE SOURCE OF ELECTRONS? MADE OF TUNGSTEN; MA CONTROLS AMT OF CURRENT/# OF ELECTRONS
WHAT IS THE IDEAL MA? 5-15
WHAT IS THERMIONIC EMISSION EFFECT? ELECTRON CLOUD; BOILING OFF OF ELECTRONS FROM THE FILAMENT
WHAT IS THE TARGET/FOCAL SPOT? MADE OF TUNGSTEN, STOPS ELECTRONS
WHEN ELECTRONS STRIKE TARGET, ENERGY PRODUCES WHAT? 1% X-RAYS & 99% HEAT
WHAT DISSAPATES HEAT GENERATED? COPPER SLEEVE & OIL
WHAT DOES FILTRATION DO? REMOVES LONG, NON-PENETRATING WAVES FROM HETEROGENEOUS X-RAY BEAM: ALUMINUM DISK 1.5-2.5 MM
WHAT DOES COLLIMATION DO? LEAD DIAPHRAM WITH A HOLE, RESTRICTS SIZE AND SHAPE OF BEAM, CIRCULAR OR RECTANGULAR, FED.REGULATION - 2.75 INCH BEAM
WHAT IS THE USEFUL BEAM? PRIMARY BEAM -> FILTRATION + COLLIMATION
WHAT ARE THE TWO ELECTRODES IN THE X-RAY TUBE? ANODE(+) AND CATHODE(-)
EFFECTIVE FOCAL AREA IS SMALLER THAN ____ FOCAL AREA ACTUAL
ELECTRONS VEER OFF COURSE, DUE TO A REDUCTION OF SPEED ARE REFERRED TO AS? BREMSSTRAHLUNG
BLOCKING CURRENT DURING 1/2 OF A CYCLE IS CALLED? RECTIFICATION
WHAT COMPONENT DIRECTS ELECTRONS TOWARD THE TARGET? FOCUSING CUP
THE PID STANDS FOR PATIENT INDICATOR DEVICE
THE X-RAY MACHINE OPERATES ON AN ELECTRIC CURRENT THAT HAS HOW MANY CYCLES/SEC? 60
X-RAYS LEAVE THE TUBE THROUGH WHAT? PORTE
THE CENTER OF THE X-RAY BEAM IS CALLED? CENTRAL RAY
Created by: 564399687