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Evaluation of radiation exposure with Tru-Align intraoral rectangular collimation system using OSL dosimeters
Arthur D Goren1, Michael J Bonvento, Thomas J Fernandez
1Department of General Dentistry, Stony Brook University School of Dental Medicine, Stony Brook, NY, USA. agoren@notes.cc.sunysb.edu
The New York State Dental Journal
|June 18, 2011
Summary
The Tru-Align rectangular collimation system significantly reduces radiation exposure by approximately 3.2 times compared to traditional round collimators. This pilot study highlights its potential for dose reduction in dental radiography.
Area of Science:
- Radiological Sciences
- Dental Imaging Technology
- Radiation Dosimetry
Background:
- Dental radiography utilizes collimators to shape X-ray beams, influencing patient radiation dose.
- Traditional round collimators may allow for scatter radiation, increasing overall exposure.
- The Tru-Align rectangular collimation system offers a potential alternative for dose reduction.
Purpose of the Study:
- To compare radiation exposure between the Tru-Align rectangular collimator and standard round collimators.
- To quantify the dose reduction achieved with the Tru-Align system.
Main Methods:
- A pilot study was conducted comparing Tru-Align rectangular and round collimators.
- InLight OSL dosimeters were used to measure radiation exposure at various points.
- Entrance, intraoral, and exit doses were recorded.
Main Results:
- Average radiation exposure with Tru-Align was 36.1 mR, versus 148.5 mR with round collimators.
- Calculations indicated a dose reduction factor of approximately 3.2 with the Tru-Align system.
- The Tru-Align system was user-friendly but occasionally caused incomplete image receptor coverage ('cone cuts').
Conclusions:
- The Tru-Align rectangular collimation system demonstrates significant potential for reducing patient radiation dose in dental radiography.
- Further investigation is warranted to address the occasional issue of incomplete X-ray coverage.
