Evidence on radiation dose reduction using rectangular collimation: a systematic review.

Background: The goal of an intraoral radiograph is to be a valuable diagnostic tool while keeping the radiation exposure dose as low as reasonably achievable. The International Commission on Radiological Protection (ICRP) has strong recommendations for patient dose-reduction strategies.

Objective: To answer the following research question: 'In either patient or in phantoms, does rectangular collimation compared with other forms of collimation reduce the radiation absorbed dose during intraoral imaging?'

Methods: The search strategy was developed specifically for each electronic database.