Operation of an X-ray machine with block diagram PDF

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Summary

The construction and operation of an X-ray machine with block diagram...

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MODULE-IV X-RAY MACHINE  

X-rays are produced whenever electrons collide at very high speed with matter and are thus suddenly stopped. X-rays are produced in a specially constructed glass tube, which basically comprises (i)a source for the production of electrons (ii) an energy source to accelerate the electrons (iii) a free electron path (iv) a mean of focusing the electron beam and (v) a device to stop the electrons.

High Tension Supply

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

Producing high voltage, which is applied to the tube's anode and comprises a high voltage step-up transformer. It produces 20 KV to 200 KV. These voltages are used to determine the contrast of the image. High voltages have high contrast.

Rectifier  Rectifies the high voltage produced by the HVT and supplies them to the anode of the X-Ray tube. mA Meter 

The current through the X-Ray tube is measured by a mA metre.

kV Selector and kV- meter  

A kV selector switch facilitates change in voltage between exposures. The voltage is measured with the help of a kV metre.

Exposure Switch 

The exposure switch controls the timer and thus the duration of the application of kV.

Voltage Compensator 

Compensates the mains supply voltage (230 V) variations.

Filament supply and mA control  The filament is heated with 6–12 V of AC supply at a current of 3– 5amperes.  The filament temperature determines the tube current or mA  The filament temperature control has an attached mA selector....