task
stringlengths 34
71
| input
stringlengths 8
997
| output
stringlengths 1
255
| options
list | pageTitle
stringlengths 18
37
| outputColName
stringlengths 1
30
| url
stringlengths 39
45
| wdcFile
stringlengths 71
74
|
|---|---|---|---|---|---|---|---|
07b4aece_shcards_about_Biology_Finals_7__Term
|
[Definition] Vestigial structures provide a clue to the evolutionary history of a species because they are remnants of structures found in the ancestral species. [Term]
|
vestigial structures
|
[] |
Flashcards about Biology Finals 7
|
Term
|
http://www.studystack.com/flashcard-1281366
|
50/1438042985647.51_20150728002305-00303-ip-10-236-191-2_737647662_3.json
|
07b4aece_shcards_about_Biology_Finals_7__Term
|
[Definition] the amount of living matter in a given habitat, expressed either as the weight of organisms per unit area or as the volume of organisms per unit volume of habitat. [Term]
|
biomass
|
[] |
Flashcards about Biology Finals 7
|
Term
|
http://www.studystack.com/flashcard-1281366
|
50/1438042985647.51_20150728002305-00303-ip-10-236-191-2_737647662_3.json
|
07b4aece_shcards_about_Biology_Finals_7__Term
|
[Definition] an organism, usually a bacterium or fungus, that breaks down the cells of dead plants and animals into simpler substances. [Term]
|
decomposer
|
[] |
Flashcards about Biology Finals 7
|
Term
|
http://www.studystack.com/flashcard-1281366
|
50/1438042985647.51_20150728002305-00303-ip-10-236-191-2_737647662_3.json
|
07b4aece_shcards_about_Biology_Finals_7__Term
|
[Definition] (of a lake) characterized by a low accumulation of dissolved nutrient salts, supporting but a sparse growth of algae and other organisms, and having a high oxygen content owing to the low organic content. [Term]
|
oligiotrophic
|
[] |
Flashcards about Biology Finals 7
|
Term
|
http://www.studystack.com/flashcard-1281366
|
50/1438042985647.51_20150728002305-00303-ip-10-236-191-2_737647662_3.json
|
07b4aece_shcards_about_Biology_Finals_7__Term
|
[Definition] (of a lake) characterized by an abundant accumulation of nutrients that support a dense growth of algae and other organisms, the decay of which depletes the shallow waters of oxygen in summer. [Term]
|
eutrophic
|
[] |
Flashcards about Biology Finals 7
|
Term
|
http://www.studystack.com/flashcard-1281366
|
50/1438042985647.51_20150728002305-00303-ip-10-236-191-2_737647662_3.json
|
07b4aece_shcards_about_Biology_Finals_7__Term
|
[Definition] life started out simple and became more complex & Lamarck believed that disuse would cause a trait to become reduced &He believed that traits changed or acquired over an individual's lifetime could be passed down to its offspring. [Term]
|
use and disuse
|
[] |
Flashcards about Biology Finals 7
|
Term
|
http://www.studystack.com/flashcard-1281366
|
50/1438042985647.51_20150728002305-00303-ip-10-236-191-2_737647662_3.json
|
07b4aece_shcards_about_Biology_Finals_7__Term
|
[Definition] Lamarck: The theory of transformation [Term]
|
Lamarck
|
[] |
Flashcards about Biology Finals 7
|
Term
|
http://www.studystack.com/flashcard-1281366
|
50/1438042985647.51_20150728002305-00303-ip-10-236-191-2_737647662_3.json
|
07b4aece_shcards_about_Biology_Finals_7__Term
|
[Definition] Carl Linnaeus is often called the Father of Taxonomy. His system for naming, ranking, and classifying organisms is still in wide use today (with many changes). [Term]
|
Linnaeus
|
[] |
Flashcards about Biology Finals 7
|
Term
|
http://www.studystack.com/flashcard-1281366
|
50/1438042985647.51_20150728002305-00303-ip-10-236-191-2_737647662_3.json
|
07b4aece_shcards_about_Biology_Finals_7__Term
|
[Definition] proposed a theory of evolution occurring by the process of natural selection. The animals (or plants) best suited to their environment are more likely to survive and reproduce, passing on the characteristics which helped them survive to their offspring. [Term]
|
Darwin
|
[] |
Flashcards about Biology Finals 7
|
Term
|
http://www.studystack.com/flashcard-1281366
|
50/1438042985647.51_20150728002305-00303-ip-10-236-191-2_737647662_3.json
|
07b4aece_shcards_about_Biology_Finals_7__Term
|
[Definition] A factor that influences individuals in a population in a manner that does not vary with the extent of crowding present in the population. [Term]
|
density independent
|
[] |
Flashcards about Biology Finals 7
|
Term
|
http://www.studystack.com/flashcard-1281366
|
50/1438042985647.51_20150728002305-00303-ip-10-236-191-2_737647662_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] the view that most of earth's geological features are the result of large-scale catastrophes such as floods, volcanic eruptions, etc. [terms]
|
catastrophism
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] the view that most of earth's geological features are the result of slow, gradual processes that have been at work for millions or even billions of years. [terms]
|
uniformitarianism
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] the decayed remains of once-living creatures [terms]
|
humus
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] inorganic crystalline substances found naturally in the earth [terms]
|
minerals
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] the process by which rocks are broken down by the forces of nature [terms]
|
weathering
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] the process by which sediments and rock fragments are carried away by wind or rain [terms]
|
erosion
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] a surface of erosion that separates one layer of rock from another [terms]
|
unconformity
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] rock formed from sediments (sand, silt, and other components of soil) and laid down by water or some other agent. [terms]
|
sedimentary rock
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] rock formed from molten rock, which is usually called magna. [terms]
|
igneous rock
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] rock that has undergone extreme change due to lots of heat and pressure. [terms]
|
metamorphic rock
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] when a single layer of rock is less than 1 centimeter [terms]
|
lamination
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] when stratified layers rest on top of unstratified layers [terms]
|
nonconformity
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] when there are parallel, stratified rock layers above and below the unconformity, but there is a clear surface of erosion between them [terms]
|
disconformities
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] unidentifiable unconformities [terms]
|
paraconformities
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] "veins" of igneous rock that shoot right through several layers of sedimentary rock [terms]
|
intrusion
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] intrusions that run in the same direction as the strata [terms]
|
sills
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
7f3782d9_Flashcards_about_Module_6__terms
|
[definitions] "veins" that run perpendicular to the dirrection of the strata [terms]
|
dikes
|
[] |
Flashcards about Module 6
|
terms
|
http://www.studystack.com/flashcard-106939
|
50/1438042991951.97_20150728002311-00113-ip-10-236-191-2_722181454_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What four conditions must exist for x-ray production to occur? [Answer]
|
--1.source of electrons--2.appropriate target material--3.high voltage--4.a vacuum
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What are the basic parts of a cathode assembly? [Answer]
|
filament/s, focusing cup, associated wiring
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What is the purpose of the focusing cup? [Answer]
|
This narrows the stream as it goes to the anode.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Explain the space charge effect. [Answer]
|
During thermionic emission the electrons build in the area of the filament and their negative charges oppose the production of more electrons
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Why is tungsten the best metal for the x-ray source? [Answer]
|
--1.It has a high melting point--2.is difficult to vaporize--3.high atomic number enhances diagnostic x-ray photos--4.heat-conducting ability
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Explain the line-focus principle. [Answer]
|
When there is a decrease in the anode angle, there will be a decrease in the effective focal spot. When there is an increase in the anode angle, there will be an increase in the effective focal spot.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] How does the anode heel affect radiation intensity? [Answer]
|
Due to the geometry of this, the radiation intensity is greater on the cathode side.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What is the advantage of a high-speed rotor? [Answer]
|
Faster anode rotation promotes better heat dissipation.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Why is it necessary for a vacuum to exist within the envelope? [Answer]
|
This permits electrons to flow without encountering the gas atoms of air.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Define leakage radiation. [Answer]
|
Any photon that escapes from the housing except at the port.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] How is off-focus radiation produced? [Answer]
|
Photons strike another object in the tube (cathode assembly, vaporized metal on a glass envelope, off-target sites on the anode, etc.).This is composed of photons that were not produced at the target.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Actual Focal Spot [Answer]
|
The physical area of the focal track that is impacted
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Anode [Answer]
|
The positive side of the x-ray tube; serves as a target surface for high-voltage electrons from the filament, conducts the high voltage from the cathode back into the x-ray generator circuitry, and serves as the primary thermal conductor.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Anode Assembly [Answer]
|
Consists of the anode, stator, and rotor
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Anode Cooling Chart [Answer]
|
Permits the calculation of the time necessary for the anode to cool enough for additional exposures to be taken.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Anode Heel Effect [Answer]
|
Due to the geometry of the angled anode target, the radiation intensity is greater(20% more) on the cathode side; 25% fewer photons on anode side
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Cathode [Answer]
|
The negative side of the x-ray tube; produces a thermionic cloud, conducts the high voltage to the gap between the cathode and anode, and focuses the electron stream as it heads for the anode.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Cathode Assembly [Answer]
|
Consists of the filament, focusing cup, and associated wiring.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Dual Focus [Answer]
|
A two-filament arrangement within the x-ray tube.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Effective Focal Spot [Answer]
|
The area of the focal spot that is projected out of the tube toward the object being radiographed.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Envelope [Answer]
|
The entire cathode and anode assembly is housed within this glass or metal structure
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Extrafocal Radiation [Answer]
|
Photons that were not produced at the focal spot; also called off-focus radiation
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Filament [Answer]
|
A small coil of thin thoriated tungsten wire
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Focal Point [Answer]
|
The portion of the anode where the high-voltage electron stream will impact; also: target, focus, focal spot, actual focal spot
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Focal Spot [Answer]
|
The portion of the anode where the high-voltage electron stream will impact; also: target, focus, focal point, actual focal spot
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Focal Track [Answer]
|
The portion of the anode where the high-voltage electron stream will impact; when discussing a rotating anode this describes the circular path that will be impacted by the electron beam
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Focus [Answer]
|
The portion of the anode where the high-voltage electron stream will impact; also: target, focal point, focal spot, actual focal spot
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Focusing Cup [Answer]
|
A shallow depression in the cathode assembly designed to house the filament
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Fractional Focal Spot [Answer]
|
A very small focal spot; usually a fraction of a millimeter in size
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Grid-Biased Tube [Answer]
|
A type of tube that quickly regulates the flow of electrons, producing x-ray photons; also: grid-controlled, grid-pulsed
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Grid-Controlled Tube [Answer]
|
A type of tube that quickly regulates the flow of electrons, producing x-ray photons; also: grid-biased, grid-pulsed
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Grid-Pulsed Tube [Answer]
|
A type of tube that quickly regulates the flow of electrons, producing x-ray photons; also: grid-controlled, grid-biased
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Housing Cooling Chart [Answer]
|
Permits the calculation of the time necessary for the housing to cool enough for additional exposures to be made
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Leakage Radiation [Answer]
|
Any photons that escape from the housing except at the port
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Line-Focus Principle [Answer]
|
Used to reduce the effective area of the focal spot
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Off-Focus Radiation [Answer]
|
Photons created somewhere in the tube other than the focal spot; can cause ghosting; not a result of scatter from patient; exit through tube window
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Protective Housing [Answer]
|
The entire cathode and anode assembly is housed within this metal structure
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Radiographic Tube Rating Chart [Answer]
|
A guide regarding the most common technical factor combinations that can be used without overloading the tube; also: tube rating chart
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Rotating Anode [Answer]
|
An anode assembly that turns during exposure
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Rotor [Answer]
|
A hollow copper cylinder or cuff that is attached to the anode disk by a molybdenum shaft
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Saturation Current [Answer]
|
Filament phenomenon; as kVp increases, a greater percentage of the thermionically emitted electrons are driven toward the anode and is reached when there are no further thermionic electrons to be driven toward the anode; effects efficiency
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Space Charge Effect [Answer]
|
As more and more electrons build up in the area of the filament, their negative charges begin to oppose the emission of additional electrons
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Space Charge Cloud [Answer]
|
The ejection of electrons from the surface of the wire due to increased heat, causing an electron cloud; also: thermionic emission, electron cloud
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Stationary Anode [Answer]
|
An anode assembly that is immobile
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Stator [Answer]
|
Mutual-induction-motor electromagnets that turn the anode
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Target [Answer]
|
The portion of the anode where the high-voltage electron stream will impact; also: target, focus, focal spot, actual focal spot
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Tube Rating Chart [Answer]
|
Provides a guide regarding the maximum technical factor combinations for each filament of each tube that can be used without overloading the tube plotted in mA, kV, and time
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Window [Answer]
|
A structure where the primary x-ray beams exit the envelope, which allows for less absorption of scatter radiation
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Wiring [Answer]
|
The parts within the cathode assembly that connect the elements of the assembly together
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What is the function of the cathode? [Answer]
|
to produce a thermionic cloud
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What is the alloy called that is used in the filament? [Answer]
|
Thoriated Tungston
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What materials, other than tungston, could be used to make the filament? [Answer]
|
Rhenium and molybdenum
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] How would a Rhenium Tungston alloy be used? [Answer]
|
As anode target material.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What is the space charge effect? [Answer]
|
During thermionic emission, electrons build at the filament and oppose production of more electrons.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What is the purpose of the focal cup? [Answer]
|
It narrows the electron stream as it goes to the anode.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What is saturation current? [Answer]
|
Once the current reaches a certain kVp, increasing kVp will not produce more electrons.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] mA controls what? [Answer]
|
The # of electrons available.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] kVp controls what? [Answer]
|
The acceleration of the electrons from the cathode to the annode.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Where are grid-biased tubes found? [Answer]
|
capacitor discharge units and angiography units
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Recorded detail are impacted by what? [Answer]
|
Filament length and width.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What is filament length? [Answer]
|
7-15 mm
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What is filament width? [Answer]
|
1-2 mm
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What is filament thickness? [Answer]
|
.1-.2
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What is the purpose of the filament? [Answer]
|
To provide sufficient resistance to the flow of electrons so that the heat produced will cause thermionic emission to occur.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What is the purpose of the cathode? [Answer]
|
to produce a thermionic cloud, conduct high voltage to the gap from the cathode to the anode, and focus the electron stream as it heads for the anode
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] The envelope of x-ray tubes can be made from what? [Answer]
|
metal or glass
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What are 2 causes of tube failure? [Answer]
|
--1.tube arcing--2.filament breakage
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Vaporized tungston deposits on the inner surface of the glass envelope can cause what? [Answer]
|
high-voltage arcing, and decreased efficiency.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What is the focusing cup made from? [Answer]
|
nickel
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] The focusing cup has what electrical charge? [Answer]
|
negative
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What 3 functions does the anode have? [Answer]
|
--1.provides a target surface--2.conducts high voltage--3.primary thermal conductor
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] Where are high speed incident electrons from the filament suddenly stopped? [Answer]
|
the anode
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
12ec4fd6_Flashcards_about_RAD121__Answer
|
[Question] What is the purpose of grid-biased tubes? [Answer]
|
Gives precise control of the thermionic cloud. Changes charge of focusing cup from negative to positive to stop electrons from flowing.
|
[] |
Flashcards about RAD121
|
Answer
|
http://www.studystack.com/flashcard-140763
|
50/1438042991951.97_20150728002311-00267-ip-10-236-191-2_729607423_3.json
|
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.