Fundamentals of Safety | Circuits | X- Rays | Radiation Protection | Random |
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As Low As Reasonably Reachable
What does ALARA stand for?
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Farad
C=Q/V
What is the unit of capacitance?
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Scatter radiation and Leakage Radiation
What are the two forms of secondary radiation?
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Collimation, Filtration, High-kVp Technique...
Name at least two methods of saving the patient from unnecessary radiation?
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Morbidly Obese and Physical Limitations
Any patient with a body mass index of 30 are ___
Technologists should be familiar with the _______ of equipment. |
1
The Relative Biological Effectiveness of diagnostic x-ray is?
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mA x Time x kVp
What is the formula to calculate heat units?
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Anode side
During the Anode heel effect, the ____ side of the x-ray tube absorbed parts of the primary beam.
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Shadow Shields, Contact Shields, and Shaped Shields
What are three different types of patient shields?
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Optically stimulated luminescence dosimeters
what is the most accurate type of dosimeter?
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A magnified image is less distorted and makes small details easier to see, but comes at the cost of increased radiation exposure to the patient.
What does magnification mode do during fluoroscopy studies?
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Measures the x-ray tube current
What is the purpose of the Ammeter?
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Characteristic interaction
What type of target interaction only occurs above 70 kVp?
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Lead Gloves and Lead Drapes
What pieces of equipment must be .25 mm of lead equivalent in terms of shielding?
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Digital Fluoroscopy
Which type of fluoroscopy system utilizes high mA technique?
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Tissue is more sensitive to radiation when irradiated in the oxygenated state than when under anoxic or hypoxic conditions
What is the oxygen effect?
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High-Voltage Section
Where is the mA meter within the x-ray system?
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Space Charge Effect
The gathering of electrons that boil together at the filament is called the?
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90%
How much does male gonad shields reduce exposure by?
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Lymphoid Tissue
The most radiosensitive tissue type in the human body is?
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Metabolic activity/Proliferation rate and age of the cell
What is the physical factors that affect radiosensitivity in different cells?
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3,400-10,000
What is the range that high speed anodes spin at?
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What are the fundamental properties of x-rays?Highly Penetrating invisible rays
Electronically neutral Polyenergetic Liberate minute amounts of heat Travels in straight lines Travels at the speed of light Ionize gases indirectly Causes fluorescence of certain crystals Can not be focused by a lens Affects photographic film Produces chemical and biological changes Produces secondary and scattered radiation
What are the fundamental properties of x-rays?
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Stationary - Never less than 38 cms / 15 inches
Mobile - Never less than 30 cms / 12 inches
What is the minimum SSD of stationary and mobile fluoroscopes?
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Whole Body - 50 mSv/yr
Lens of Eye - 150 mSv/yr Extremities - 500 mSv/yr Skin - 500 mSv/yr
What is the dose equivalent limits for
Whole Body, Lens of the Eye, Extremities, and Skin? |