Study on radiation dose in different field of views of oral and maxillofacial cone-beam CT
10.3760/cma.j.issn.1002-0098.2018.11.006
- VernacularTitle: 锥形束CT扫描视野设置对口腔颌面部非目标部位辐射剂量的影响
- Author:
Lina KANG
1
;
Fei GUO
1
;
Xiangkui ZHU
2
;
Pinggong DU
1
;
Jianguo ZHANG
3
;
Zechen FENG
4
Author Information
1. Department of Oral Maxillofacial Surgery, Yantai Stomatological Hospital Affiliated to Binzhou Medical College, Yantai Shandong 264001, China
2. Department of Radiology, Yantai Stomatological Hospital Affiliated to Binzhou Medical College, Yantai Shandong 264001, China
3. Department of Oral Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
4. Beijing Centers for Diseases Control and Prevention, Beijing 100013, China
- Publication Type:Journal Article
- Keywords:
Cone-beam computed tomography;
Radiation dosage;
Scanning parameters
- From:Chinese Journal of Stomatology
2018;53(11):748-752
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To analyze the absorptive radiation dose of non-target sensitive organs under the NewTomVGi oral and maxillofacial cone-beam CT scanning in different view fields.
Methods:The thermoluminescence dosimeter chip was placed in the non-target sensitive organ of the simulated radiology head model, and 6 scanning fields were measured and analyzed (standard resolution: scanning range was 15 cm×15 cm, 15 cm×12 cm, 12 cm×8 cm, 8 cm×8 cm respectively). High definition resolution: the radiation absorption dose of thermoluminescence with the scanning range of 12 cm×8 cm, 8 cm×8 cm, respectively.
Results:Under the same resolution, the absorptive dose increased with the expansion of scanning field, and the amount of absorbent during high resolution scanning was higher than that during the standard resolution with the same scanning field.
Conclusions:New TomVGi oral and maxillofacial cone-beam CT has sighificant difference in radiation dose in different view fields. The appropriate view field should be selected according to the patient′s clinical needs, so as to reduce unnecessary radiation dose during medical imaging examination.
