A particular point in the cardiac cycle.

See also Arrhythmia Rejection.

Cardiology is a medicine sector that covers the clinical study, treatment and imaging of the heart actions and diseases.

See also Ischemia, Calcium Score, Cardiac Phase, Diastole, Adventitia, Defibrillator, ECG Trigger, Arrhythmia Rejection.

A cassette is a thin, low x-ray absorption plastic case, for holding the x-ray film. Inside the cassette are intensifying screens for the conversion of x-rays to visible light photons. The intensifying screens are mounted in close contact with the film. Mammography cassettes are equipped with single screens.

A cathode is an electrode through which electric current flows out of a polarized electrical device. X-rays are produced by bombarding a target (the cathode), which is usually made of tungsten.

The cation is a positive charged ion. Cations are attracted from the cathode.