Collimator definition

Collimator means a radiation shield that is placed on the end of the guide tube or directly onto a radiographic exposure device to restrict the size of the radiation beam when the sealed source is cranked into position to make a radiographic exposure.

Collimator means one of the following:

Collimator means a device used to limit the size, shape, and direction of the primary radiation beam. For industrial radiography it means a radiation shield that is placed on the end of the guide tube or directly onto a radiographic exposure device to restrict the size of the radiation beam when the sealed source is cranked into position to make a radiographic exposure.

Examples of Collimator in a sentence

• A Laser diodeFObjective lensB Collimator lensGOptical diskC Optional shaping prismHSplit photodetectorD Polarizing beamsplitterI1, I2Outputs currents from the split photodetectorE Quarter-wave plateK1, K2d.c.-coupled amplifiers Figure 1 – Optical system of the Reference Drive The combination of the polarizing beamsplitter D and quarter-wave plate E separates the incident optical beam and the beam reflected from the optical disk G.

• A Mini Multileaf Collimator (MMLC) of 4 mm leaf thickness and 10x12 cm maximum field size at the isocentre is also used for stereotactic 3D conformal and IMSRT techniques for treatment of larger lesions.

• If δ = 0, the collimating effect is disabled, so that the component only consists of two rectangular apertures.For a more detailed Soller collimator simulation, taking every blade into account, it is possible to use Channeled guide with absorbing walls, see section 5.3. 4.5.1. Collimator transmission‌−The horizontal divergence, ηh, is defined as the angle between the neutron path and the vertical y z plane along the collimator axis.

• Since it is hard to change these assumptions, this is where culture has its ultimate power.

• Collimator blurring and intrinsic detector blurring can be modeled by a distance- dependent camera point spread function ( ).

More Definitions of Collimator

Collimator means a device or mechanism by which the x-ray beam is restricted in size.

Collimator means a device for restricting the useful radiation in one or more directions.

Collimator means a device used to limit the size, shape, and direction of the primary radiation beam.

Collimator means a device or mechanism by which the x-ray or gamma-ray beam is restricted in size.

Collimator means a radiation shield of lead or other heavy metal which is placed on the end of a guide tube or directly onto a radiographic exposure device to restrict the size and shape of the radiation beam when the sealed source is moved into position to make a radiographic exposure.

Collimator means a device used to limit the radiation field. Beam-limiting devices are specific types of collimators.

Collimator means a device or mechanism by which the x-ray beam is restricted in size (see "Beam-limiting device").