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The modern systems all operate under what is called as a

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pulse fluoroscopy mode.

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So what is pulse fluoro?

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Especially with respect to patient dose, it becomes very important.

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Shown here is the radiation dose percent with a continuous

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fluoro mode.

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If we change to 15 frame, that is about almost half, the

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radiation dose now goes about 20% to 30% here,

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and 7.5 frame per second, which is quite commonly used in

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cardiology, further decreases the radiation dose to the patient.

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So the dose reduction is achieved with shorter X-ray

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pulses as a higher X-ray tube.

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For example, here is an example. For a continuous fluoro,

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the radiation is continuously on throughout the body, whereas

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this one for a pulse fluoro, there are some gap between

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the two.

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It is the same area, but a gap between the two will

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automatically keep the image quality same and able

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to reduce the radiation dose.