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| Average voltage and amperage of the negative terminal on the cathode |
10V
3-5 amps |
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noypi69 Mon, 26 Jan 2009 19:52:32 GMT |
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| The metallic surface usually of platinum or tungsten upon which the stream of cathode rays within an x-ray tube is focused and from which the x-rays are emitted |
Target |
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noypi69 Mon, 26 Jan 2009 19:52:32 GMT |
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| A cloud of electrons in the vicinity of the filiament |
Space Charge |
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noypi69 Mon, 26 Jan 2009 19:52:32 GMT |
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| A negatively charged metal shroud in which the filament is embedded |
Focusing cup |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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| A tenuous conductor made incandescent by the passage of an electric current |
Filament |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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| To tend to move towards one point or another |
Converge |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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| Maintains vacuum in the Glass envelope |
Pyrex Envelope |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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Turns the targe to spread out heat loading,
Made of 2 parts
Rotor/Stator |
Induction Motor |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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| Concentrates the cathode stream |
Focus cup in Cathode |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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| Provides source of electrons |
Filament in a Cathode |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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| A shaft made of bars of copper and soft iron fabricated in one mass, located inside the x-ray glass envelope |
Rotor |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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| Used for glass and glassward that contains appreciable oxide of boron and is resistant to heat chemicals and electricity |
Pyrex |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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| The electron emitting electrode of an electron tube |
Cathode |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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| The electron-collecting electronde or an electron tube |
Anode |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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| Metal/Ceramic x-ray tube |
High Performance x-ray tube (super rolatix)
Metal Casing instead of glass
Anode rotates on axle |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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| Mammography X-ray tube |
Operated at low kilovoltage (<50kvp)
Molybdenum anode
Beryllium Window |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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| Grid-controlled x-ray tube known as |
Triode |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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Rotating anode X-ray tube was introduced...
Commercially available since... |
1929
1936 |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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Characterisitcs of a HOT CATHODE x-ray tube
AKA: Coolidge Tube |
Compatable for use with the Snook transformer
Vacuum tube allowes intensity and energy to be selected separatley and with great accuracy
Normally made of two electrodes in a glass tube |
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noypi69 Mon, 26 Jan 2009 19:52:31 GMT |
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| Characterisitics of the Crooks tube |
Fewer Xrays produced
More heat generated
Electron flow hindered| |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| An electron tube with an anode, a cathode, and controlling grid |
Iriode |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| A large partially evacuated glass tube developed by Sir William Crookes |
Crookes tube |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| When was the Coolidge Tube introduced to the medical community |
1913 by William D. Coolidge |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| A vacuum x-ray tube which allowed X-ray intensity and energy to be selected seperatly and with great accuracy |
Coolidge Tube |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| High speed electrons projected in a stream from the heated cathode of a vacuum tube under the propulsion of a strong electric field |
Cathode Ray |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| A steel-grey, light weight corrosion resistant, rigid metallic element used chiefly as a hardening agent |
Beryllium |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| In breaking radiation targerts with hgih atomic numbers cause.. |
Faster Deceleration of electron speed |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| Emission of characterisitic radiation constitute what percent of emitted X-rays between 80-100 KVP? |
10% |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| In the case of breaking radiation what is the percentage of emitted X-rays when the tube potential is 80-100 kV |
90% |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| at 80 kV how much energy is heat |
99.4% |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| at 80 kV how much energy is X-ray |
.6% |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| The narrower the electron beam, the smaller the focus.. |
Teh sharper the x-ray image |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| Speed of Light |
186,000 Miles per second |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| Term for Liberated electrons |
Thermions |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| Conditions necessary for the production of X-rays |
Separation of electrons
Production of high speed electrons
Focusing of electrons
Stopping of high speed electrons in target (anode) |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| Basic principles of X-ray production |
Fast-moving electrons undergo rapid deceleration
Electrons drop from an outershell to a hole in an inner atomic shell |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| An electrically charged particle emitted by an incandesecent substance |
Thermions |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| The giving off of electrons from the surface of a heated metal |
Thermionic emission |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| A low current of electricity which flows through the filament of the cathode |
Filament Current |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| White glowing or luminous with intense heat |
Incandecent |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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Unveiled the hot-cathode x-ray tube in 1913
Reconized as far superior to the crooks tube |
William D Coolidge |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| Counted as the first X-ray death in US in 1904 |
Clarence Dally |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| Two materials stull used in fluoroscopes today |
Zinc Cadmiun Sulfide
Calcium Tungstate |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| Developed the Fluoroscope in 1898 |
Thomas Edison |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| Demonstrated technique or reducing exposure times and enhancing the image by using double emulsion radiography in 1904 |
Charles Leonard |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| Demonstrated technique of reducing exposure times by using an intesigying screen in conjunction with glass photographic plates |
Michael Pupin |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| Discoverd X-ray on Nov 8 1895 |
Wilhem Conrad Roentgen |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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| Discovered a large partially ecacuated glass tube which bears his name |
William Crooks
"Crooks Tube" |
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noypi69 Mon, 26 Jan 2009 19:35:02 GMT |
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