(MIP) CT Angiography images can be processed by maximum intensity projection to interactively viewing volumes of data, where the CT number of each pixel is given by the minimum CT number through the volume. The MIP connects the high intensity dots of the blood vessels in three dimensions, providing an angiogram that can be viewed from any projection. Each point in the MIP represents the highest intensity experienced in that location on any partition within the imaging volume. For complete interpretation the base slices should also be reviewed individually and with multiplanar reconstruction (MPR) software. The MIP can then be displayed in a Cine format or filmed as multiple images acquired from different projections.

(MinIP) The minimum intensity projection is similar to maximum intensity projection (MIP), but used to display low density objects.
See also Contrast.

The brightness is the balance of light and dark shades in a displayed image. High brightness (also called density or intensity) settings produce bright images and low settings produce dark images. The contrast determines how many gray levels are displayed and the density determines the intensity.

(dB) A customary logarithmic measure most commonly used (in various ways) for measuring sound. Decibel is a way to express the ratio of two sound intensities: dB=10log10I1/I2 being I1 the reference. If one sound is 1 bel (10 decibel) 'louder' than another, this means the louder sound is 10 times louder than the fainter one. A difference of 20 decibel corresponds to an increase of 10 x 10 or 100 times in intensity.
The intensity of ultrasound is measured in db/cm and decreases during the propagation.
For sound pressure (the pressure exerted by the sound waves) 0 decibel equals 20 micropascal (µPa), and for ultrasonic power 0 decibel sometimes equals 1 picowatt.
See also Phon, Pascal, Logarithms, Proportionality Constant, Watt, Diagnostic Imaging.

(lx) Lux is the SI unit of illumination. Lux is based on lumen, and lumen is a derived unit based on candela. One lux is equal to the intensity of light on a surface that is 1 m from a uniform point source of one candle intensity or equal to one lumen (lm) per square meter.
The formula is:
1 lx = 1 lm/m²