See Hospital Information System.

A clinical trial is a controlled study involving human subjects, designed to evaluate prospectively the safety and effectiveness of new drugs or devices or of behavioral interventions.

See also Adverse Reaction and Safety of Contrast Agents.

The CM (contrast material) ratio refers to the ratio between the number of iodine atoms and the number of particles in the solution. The CM ratio is fundamental in the chemical analysis of contrast media.

See also Ionic Dimer, Ionic Monomer, Nonionic Dimer and Nonionic Monomer.

The act of maintaining a constant phase relationship between oscillating waves and rotating objects

Coincidence detection is the simultaneous detection of two signals. The simultaneous detection for example of two photons, annihilation coincidence detection, is used in PET imaging.

See also Annihilation Coincidence Detection.