A technique chart must be posted in the vicinity of each control panel. The
technique chart indicates what x-ray machine settings to use for various x-ray
examinations. For dental facilities the technique chart must include:
- The patient's body part and anatomical size (or age, for pediatrics),
versus technique factors (kVp, mA, seconds) to be utilized.
- The type and size of film or film-screen combination.
- The type of grid, if any (grids are typically not used in dental
- The type and location of patient shielding, such as gonadal shielding.
- Source to image receptor distance, except for dental intra-oral
radiography, or when there is a single fixed source to image receptor
Many newer x-ray systems have these parameters electronically programmed into
the control panel. If this is the case, a separate technique chart will not be
needed. However, if any of the above items is NOT listed on the control panel, a
posting must be made to account for this.
For instance many control panels allow the user to select from pre-programmed
techniques for various film types (type E, type D, etc...). A posting would need
to be made near the control panel to indicate the type of film used at the