Xray

X-RAY MACHINE

← A machine that provides a sufficient intensity of electron flow in a controlled manner to produced a x-ray beam of desired quantity and quality.

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Three principal parts of x-ray machine:

1. X-ray tube

2. Control Console

3. High Voltage Section

1.) X-RAY TUBE:

➢ Part of the x-ray machine rarely seen by the technologist. It is enclosed by the glass envelope and the tube housing itself.

➢ Part of the machine where the production of x-ray starts.

➢ It is also called as the diode tube because it has two electrode; the cathode and anode.

Two terminal of the X-tube:

1. Anode (positive)- where the target is located

2. Cathode (negative)- where the filament and the focusing cup is located

Two types of anode:

1. Rotating anode- usually driven by the INDUCTION MOTOR.

2. Stationary anode

Rotating anode – is used for general purpose of x-ray tube and it is capable of

producing high intensity x-ray beams in a short time/high tube

current. Its advantage is that, it prolonged the life span of the tube.

Part of the Induction Motor:

1. Stator – part outside the glass envelope.

2. Rotor – part inside the glass envelope. It is lubricated by a metallic lubricant (silver).

Stationary anode – used only in dental x-ray machine and portable machine

where high tube current is not required.

Function of the Anode:

1. Receive electrons emitted by the cathode, conducts them thru the tube to the connecting cables, back to the high voltage section of the x-machine.

2. Electrical conductor

3. Mechanical support

4. Thermal conductor

Parts of the X-RAY TUBE:

1. Target (Anode)

2. Filament (Cathode)

3. Focusing Cup

4. Glass Envelope

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