The dipping method is a contact autoradiography of tissue using emulsion coated coverslips or x-ray films.

(DC) A continuous current that flows in only one direction.

Direct exposure films are highly sensitive to the direct effect of x-rays rather than in combination with an intensifying screen. However, a film is a relatively inefficient radiation detector and requires relatively high radiation exposure. The use of rectangular collimation and the highest speed films reduce radiation exposure.

See also Conventional Radiography.

Direct radiation is emitted from the target or source that passes though the collimator opening.

The directional dose equivalent is the equivalent dose at a point in a radiation field that would be produced by the corresponding expanded field at depth on a radius in a specified direction. The unit of directional dose equivalent in the SI system of units is joule per kilogram (J/kg) and sievert (Sv).