X-RAY -1

 X-RAY TUBE

• mainly divided into two parts i.e, CATHODE (negative) and ANODE(positive).

• the small increase in filament voltage results in large increase in tube current which accelertes high speed electrons from very high temperature filament negative cathode.

• within vaccum, towards positive tungsten target anode.

• Now, anode rotates to dissipate heat generated.

• then xrays are genereted and an xray beam is directed towards the patient.

• the xrays penetration and attenuation depends upon the density, there are basically five densities which can be distinguish by the colour factor.

• these are AIR (more on the deep black side) for eg. air seen on x-ray chest radiograph.

• FAT (less black than the air)
• SOFT TISSUE (appears to be dark grey)
• BONE (appears white but may vary if any contrast medium is injected)
• METAL (it is more brighter than the bone) 

X-RAY Images from Google

• only 1% xray is generated the rest of the heat is dissipated. If the heat is not dissipated it can lead to tube damage.

• to prevent tube failure different heat aborption method is practiced to do so.

• it can be done by oil cooling, fan cooling, etc.

• nowadays, rotatary anode is used in place of stationary anode is used to prevent periodic tube failure.

PLANES OF BODY
• Axial or transverse --- it is an imaginary line which divides the body into upper half and lower half.

• Saggital --- it is an imaginary line which divides the body from superior to inferior or from inferior to superior.

• Coronal --- it is an imaginary line which divides the body from either left to right or from right to left.

• all the three planes are considered by MSP (mid saggital plane).

Author- 

ANJALI DI