X Ray Tube Voltage Definition

This anode rotates to dissipate heat generated.

X ray tube voltage definition. An x ray tube is a vacuum tube that converts electrical input power into x rays. Stipulate the x ray tube heat unit storage capacity. X ray voltage means voltage which is applied across anode cathode this is of very high voltage in kv. A small increase in the filament voltage 1 results in a large increase in tube current 2 which accelerates high speed electrons from the very high temperature filament negative cathode 3 within a vacuum towards a positive tungsten target anode 4.

Oil surrounds the transformers inside the tank for heat dissipation. The autotransformer step down transformer and high voltage transformer are all located in a tank near the x ray machine fig. To supply the various circuits in the x ray unit with the proper voltages the. The general purpose x ray tube is an electronic vacuum tube that consists of an anode a cathode and an induction motor all encased in a glass or metal enclosure envelope.

Accordingly the tube current exposure time product value mas is reduced to 36 mas. The x ray tube filament as used in medical radiography must be heated until. Therefore x radiation is created by taking the energy from the electrons and converting it into photons this very specific energy conversion takes place in the x ray. Stipulate the heat unit and anode storage capacity.

The availability of this controllable source of x rays created the field of radiography the imaging of partly opaque objects with penetrating radiation in contrast to other sources of ionizing radiation x rays are only produced as long as the x ray tube is energized. X ray tube should be focal spot 0 6 mm small 1 0 mm or similar large. The primary purpose of the high voltage circuit is to supply the x ray tube with voltage high enough to create x rays. Figure 5 3 provides a labeled illustration of this design.

Heat is considered the undesirable product of this conversion process. X ray collimator must be of high quality to minimize radiation outside the selected field of radiation. Whereas at 60 kv the value was much higher 141 mas. The increase in x ray tube voltage increases the amount of radiation coming out of the x ray tube as well as the average photon energy i e increased penetration.

Recall that the anode is the positive end of the tube and the cathode is the negative end of the tube. When the electrons hit the target x rays are created by two different atomic processes. Voltage compensator which is used to correct variations. Volts per turn ratio of the autotransformer must be controlled.

X ray tube should have high speed rotor circuitry. This causes a high electric field for the moving of electrons emitted from cathode to anode.