A SPECIAL REPORT
RECTANGULAR COLLIMATION
No longer a matter of choice!
Robert Langlais DDS MS FACD University of Texas San Antonio, Texas
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TABLE OF CONTENTS
1.
What is rectangular collimation?
2.
Why is rectangular collimation no longer a matter of choice?
3.
What are the advantages of rectangular collimation?
4.
How is the X-ray beam positioned for rectangular collimation?
5.
What is the proper beam filtration setting?
6.
Are there any disadvantages to rectangular collimation?
7.
How does this impact on my current intraoral x-ray equipment?
8.
What ways are there available to convert my existing intraoral x-ray
machines?
9.
How does this affect current intraoral x-ray exposure techniques?
10. Are film holder-beam indicating devices needed?
11. Is rectangular collimation the same for film based and digital intraoral
systems?
12. What sources are available for rectangular collimation conversion
devices?
13. What are the costs of conversion to rectangular collimation?
14. Are there alternatives to the conversion of existing machines?
15. Appendix: Guidelines for prescribing dental radiographs.
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1.
WHAT IS RECTANGULAR COLLIMATION?
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2.
WHY IS RECTANGULAR COLLIMATION NO LONGER A
MATTER OF CHOICE?
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3.
WHAT ARE THE ADVANTAGES OF RECTANGULAR
COLLIMATION?
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4.
HOW IS THE X-RAY BEAM POSITIONED FOR RECTANGULAR
COLLIMATION?
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5.
WHAT IS THE PROPER BEAM FILTRATION SETTING?
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6.
ARE THERE ANY DISADVANTAGES TO RECTANGULAR
COLLIMATION?
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7.
HOW DOES RECTANGULAR COLLIMATION IMPACT ON MY
CURRENT INTRAORAL X-RAY EQUIPMENT?
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8.
HOW CAN I CONVERT MY EXISTING INTRAORAL X-RAY
MACHINES?
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9.
HOW DOES THIS AFFECT CURRENT INTRAORAL X-RAY
EXPOSURE TECHNIQUES?
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10. ARE FILM HOLDER-BEAM INDICATING DEVICES NEEDED?
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11. IS RECTANGULAR COLLIMATION THE SAME FOR FILM
BASED AND DIGITAL INTRAORAL SYSTEMS?
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12. WHAT SOURCES ARE AVAILABLE FOR RECTANGULAR
COLLIMATION CONVERSION DEVICES?
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13. WHAT ARE THE COSTS OF CONVERSION TO
RECTANGULAR COLLIMATION?
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14. ARE THERE ALTERNATIVES TO THE CONVERSION OF
EXISTING MACHINES?
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