Characteristics Of X-Ray Film

 Characteristics Of X-Ray Film

1. Density-: 

Density refers to the darkness above the film, the greater the darkness of the film, the greater the density of the film. The density depends on the exposure, the higher the density received by the radiation film in the amount, the higher the density will be on the film. Measuring the blackness of a film is called optical density.
Which is defined by the following figure.
0.25–2.0 optical density is commonly used inside radiology. 
Characteristics Of X-Ray Film


The density of the film depends on the following.
A. Quantity of x-ray beam-: 
Quantity of a beam is the number of xray photons. Increasing the value of current / current inside the x ray tube will also increase the production of electrons, which will also increase the number of xray photons. And the density of the film will also increase. Due to which the patient dose will also be more. Therefore, the density will also increase as the beam's volume increases. 
B. The quality of x-ray beam
expresses the penetrating power of the X-ray beam. If you increase the Kv, a greater amount of tissue will penetrate the xrays and reach the film, which will make the film darker. And the density of the film will also increase. Hence, the density will also increase with increasing the quality of the xray beam.

2. Object density

If the density of the object is high, then the density of the film will be less. Because the density or thickness of the patient will be higher, the absorption of xray will be higher, which will lead to fewer xrays reaching the film. Due to which the blackness on the film will also be reduced. 

3. Film fog

Density is reduced due to film fog. Which can be produced due to improper safe light. 

4. Exposure 

Density also increases along with exposure.