Category: R
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Rotary converter
The primary purpose of this apparatus is to convert direct current into alternating current, enabling the operation of X-ray machinery through a power source derived from a storage battery.
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Root-mean-square value
The root mean square (rms) is the square root of the average of the squares of a series of related values. In the context of alternating current, the rms value corresponds to the direct-current value that would generate an equivalent heating effect. For a sine wave, the rms value is 0.707 times the peak value.…
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Roentgenography
Photography accomplished using roentgen rays is referred to as roentgenography. The terms roentgenography and radiography are often used interchangeably as they essentially convey the same meaning. Capturing images using X-rays, also known as radiography or skiagraphy.
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Roentgen equivalent physical
The rad is a unit of measurement for ionizing radiation, representing the amount that leads to the absorption of 93 ergs of energy per gram of soft tissue. It is also known as the equivalent roentgen.
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Right-hand rule
This rule is commonly referred to as the motor rule. According to the motor rule, if the thumb and the first two fingers of the right hand are positioned at right angles to one another, with the index finger indicating the direction of the magnetic field and the middle finger representing the direction of the…
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Rhombic grid
The utilization of a rhombic pattern, characterized by a crosshatch effect, restricts the possibility of tube angulation. However, it should be noted that this type of pattern is currently unavailable in the market as it is not being manufactured at present.
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Resolution target
A testing device that employs line pairs to assess the level of radiographic sharpness.
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Radiographic resolution
Radiographic definition refers to the skill and technique employed to create a radiographic image while preserving the intricate structural details of the irradiated area. This term encompasses the capability of the imaging system, such as a screen-film combination, television system, or fluoroscope, to accurately capture and display the fine details in the radiographic image.
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Resistor
A device specifically designed to possess a predetermined amount of resistance, utilized in circuits either to restrict the flow of current or to provide a voltage drop.
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Resistance loss
Power loss refers to the dissipation of power that occurs when current flows through a resistance. The value of power loss, measured in watts, is equal to the resistance in ohms multiplied by the square of the current in amperes.