x-ray machine

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x-ray machine by Mind Map: x-ray machine

1. tube head

1.1. tube

1.1.1. cathode(-ve)(source of electrons)

1.1.1.1. filament

1.1.1.1.1. tungusten

1.1.1.2. focusingcup

1.1.1.2.1. made of molybedenum

1.1.2. anode(+ve)

1.1.2.1. target

1.1.2.1.1. made of tungsten

1.1.2.2. copper blok

1.1.2.2.1. thermal conductor that allows efficientdissipation of heat generated during x-ray production

1.1.3. insulating oil

1.1.3.1. remove the heat & prevent electric shock

1.1.4. metal housing

1.1.4.1. 1- surrounding lead

1.1.4.1.1. absorbs unwanted x-rays

1.1.4.2. 2- surrounding glass tube

1.1.4.2.1. supports & protect the tube&oil

1.1.4.3. 3- small aperture

1.1.4.3.1. opposite to the target from which the useful beam emerges

1.2. accessories

1.2.1. filter

1.2.1.1. pure aluminium

1.2.1.1.1. placed at the aperature of the x-ray tube

1.2.1.1.2. types

1.2.2. collimator

1.2.2.1. lead disc or cylinder with centeral aperture

1.2.2.1.1. shapes & limits the beam size

1.2.3. cone(PID)

1.2.3.1. indicating the direction of beam & sitting the distance from focal spot on target to the skin

1.2.3.1.1. material

1.2.3.1.2. shape

1.2.3.1.3. length

1.3. power supply

1.3.1. current to heat the filament & potential differance to accelerate the electrons from cathode to anode

1.3.1.1. step-down transformer

1.3.1.1.1. from 220 to (8-12) V

1.3.1.2. step-up transformer

1.3.1.2.1. from 220 V to (60-90)KV

2. adjusting arm

3. control panel

3.1. on/off switch

3.2. timer

3.3. exposure time selector

3.4. warnning light or audibule signals