Angina may feel like pressure or squeezing in your chest. The pain also can occur in your shoulders, arms, neck, jaw, or back. Angina pain may even feel like indigestion. Angina isn't a disease; it's a symptom of an underlying heart problem.
Uses of X-rays. The main use of X-rays is in medicine. A comman application is in the form of X-ray machines, which take photos of a patientâs body. If an arm or leg were broken for example, then this limb would be put in front of the X-ray with a piece of photographic film behind.
The main function of screens is to reduce radiation to the patient. Currently, there are two groups of X-ray films for dental purposes: 1. Non-screen - Those with emulsions more sensitive to direct exposure of X - rays. These are primarily used as intraoral films and provide excellent image quality.