TYPES & USES OF GRIDS IN RADIOGRAPHY

 Grids are an essential part in radiography which improves the quality of image by reducing the scattered radiation which can affect the image quality and contrast.

TYPES OF GRIDS:-

1. LINEAR GRID:-

Linear grids consist of lead which absorbs scattered radiation and is built with interspace materials like plastic or aluminium. The lead strips are aligned in one direction and these types of Grids are used in general Radiography

2. CROSSED GRID:-

Crossed Grids consists of two linear Grids placed to each other at right angle. it's more effective as it removes scattered radiation from both directions

3. FOCUSED GRID:-

A focused grid is a type of X-ray grid with lead strips that are parallel in the center and progressively slant towards the edges.These are more effective in reducing scattered radiation

4. STATIONARY GRID:-

Stationary grids in radiography are made of closely spaced lead strips separated by radiolucent material, like plastic or aluminum.These Remain fixed in position; used for most routine imaging.

5.MOVING GRID:-

This is a type of grid which moves during the exposure  and is attached to the table which is called as Bucky. This was invented by Gustav Bucky so it is named after him.

ADVANTAGE:-

Grids increases image quality and contrast by reducing the scattered radiation 

DISADVANTAGE:-

It requires higher exposure which can increase the patient dose.

Grid artifacts can occur if grid isn't positioned well.

Fig.01 ANTI SCATTER GRID