Effective radiation dose of ProMax 3D cone-beam computerized tomography scanner with different dental protocols.
OBJECTIVE
The aim of this study was to compare effective doses resulting from different scan protocols for cone-beam computerized tomography (CBCT) using International Commission on Radiological Protection (ICRP) 1990 and 2007 calculations of dose.


METHODS
Average tissue-absorbed dose, equivalent dose, and effective dose for a ProMax 3D CBCT with different dental protocols were calculated using thermoluminescent dosimeter chips in a human equivalent phantom. Effective doses were derived using ICRP 1990 and the superseding 2007 recommendations.


RESULTS
Effective doses (ICRP 2007) for default patient sizes from small to large ranged from 102 to 298 μSv. The coefficient of determination (R(2)) between tube current and effective dose (ICRP 2007) was 0.90. When scanning with lower resolution settings, the effective doses were reduced significantly (P < .05).


CONCLUSIONS
ProMax 3D can provide a wide range of radiation dose levels. Reduction in radiation dose can be achieved when using lower settings of exposure parameters.
Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Beijing, China.
Xing-min
XM
Qu
Gang
G
Li
John B
JB
Ludlow
Zu-yan
ZY
Zhang
Xu-chen
XC
Ma
D000328:Adult; D001853:Bone Marrow / Q000528:radiation effects; D001921:Brain / Q000528:radiation effects; D002574:Cervical Vertebrae / Q000528:radiation effects; D002610:Cheek / Q000528:radiation effects; D054893:Cone-Beam Computed Tomography / Q000295:instrumentation* / Q000379:methods; D004947:Esophagus / Q000528:radiation effects; D005152:Facial Muscles / Q000528:radiation effects; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000295:instrumentation* / Q000379:methods; D007908:Lens, Crystalline / Q000528:radiation effects; D008198:Lymph Nodes / Q000528:radiation effects; D008297:Male; D008334:Mandible / Q000528:radiation effects; D009061:Mouth Mucosa / Q000528:radiation effects; D009915:Orbit / Q000528:radiation effects; D010306:Parotid Gland / Q000528:radiation effects; D019047:Phantoms, Imaging; D010614:Pharynx / Q000528:radiation effects; D011829:Radiation Dosage; D011835:Radiation Protection / Q000379:methods; D011861:Radiography, Dental / Q000295:instrumentation* / Q000379:methods; D012062:Relative Biological Effectiveness; D012867:Skin / Q000528:radiation effects; D012886:Skull / Q000528:radiation effects; D013363:Submandibular Gland / Q000528:radiation effects; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation; D013961:Thyroid Gland / Q000528:radiation effects; D015898:Tomography Scanners, X-Ray Computed