کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3168678 1586354 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of CBCT exposure conditions on radiation dose
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی دندانپزشکی، جراحی دهان و پزشکی
پیش نمایش صفحه اول مقاله
Influence of CBCT exposure conditions on radiation dose
چکیده انگلیسی

BackgroundCone-beam computed tomography (CBCT) has been changing the way dental practitioners use imaging. The radiation dose to the patient and how to effectively reduce the dose is still not completely clear to most users of this technology.ObjectiveThe objective of this study was to quantitate the change in radiation dose when using different CBCT settings.MethodsA CBCT machine was modified to allow different setting combinations. The variables consisted of 4 different mA choices (2, 5, 10, and 15), 2 kVp choices (100 and 120), and 3 fields of view (6 inches, 9 inches, and 12 inches). A radiation phantom with 10 thermoluminescent dosimeters (TLD) was used to measure radiation dose. One specific setting (15 mA, 120 kVp, and 12-inch FOV) was scanned 3 times to determine consistency.ResultsThe CBCT showed less than 5% variance in radiation dose values. An overall reduction in dose of about 0.62 times was achieved by reducing the kVp from 120 to 100. When reducing the field size the dose decreased 5% to 10%, while for organs that escaped the direct beam the reduction was far greater.ConclusionsA reduction in radiation dose can be achieved by using the lowest exposure settings and narrow collimation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology - Volume 105, Issue 6, June 2008, Pages 773–782
نویسندگان
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