What is the 10kvp rule?

A longstanding ‘rule of thumb’ suggests that increasing kVp by 10 whilst halving the time gives similar perceptual image quality when compared to the original exposure factors.

What is the reciprocity law in radiography?

The reciprocity law constitutes one of the fundamental rules of photography and of radiography. It states that the quality of a series of photographic or radiographic films will be uniformly constant if the exposure times with which the films are made vary reciprocally with the intensities of the exposing radiation.

What is the 15\% rule formula?

“The intensity of a source of radiation is inversely proportional to the square of the distance.” The book’s definition of the 15\% rule is “changing the kVp by 15\% has the same effect as doubling the mAs or reducing the mAs by 50\%.”

What is the 15-15 rule for diabetics?

For low blood sugar between 55-69 mg/dL, raise it by following the 15-15 rule: have 15 grams of carbs and check your blood sugar after 15 minutes. If it’s still below your target range, have another serving. Repeat these steps until it’s in your target range.

What is kVp and mAs?

* kVp: the power and strength of the x-ray beam (quality of the x-rays). * mAs: the number of x-ray photons produced by the x-ray tube at the setting selected (quantity of x-rays). * time: how long the exposure lasts. Understanding Technique. kVp stands for kilovoltage peak.

What is mA in radiography?

mAs. Milliamperes (mA) is a unit representing the amount of current passed through the X-ray tube. Current determines the number of photons produced by the X-ray tube, also known as X-ray quantity. [12] Another contributing factor toward X-ray quantity is the total exposure time, measured in seconds.

What are reciprocity laws?

Reciprocity is the the mutual exchange of privileges between states, nations, businesses, or individuals for commercial or diplomatic purposes. For example, Minnesota and Wisconsin have a reciprocity agreement that allows citizens of either state to attend the other states’ public universities at the in-state rate.

What does time determine in radiology?

The time factor (s) is a measure of the electrons production duration in the tube; meaning ‘s’ prescribes how long mA will last. Increasing either the current or time will increase the quantity of radiation; therefore the amount of radiation in an examination is represented as mAs.