Value of open-mouth scanning for artifact reduction in CT scanning of patients with metallic oral implants
10.3969/j.issn.1005-202X.2025.03.011
- VernacularTitle:张口位扫描在口腔金属植入物患者CT检查中减少伪影的应用价值
- Author:
Dongdong ZHAO
1
;
Jiarui XIE
1
;
Lingbo DENG
1
;
Hui ZHANG
1
Author Information
1. 北京大学深圳医院医学影像科,广东 深圳 518036
- Publication Type:Journal Article
- Keywords:
open-mouth position;
oral CT;
metal artifact;
artifact index
- From:
Chinese Journal of Medical Physics
2025;42(3):356-359
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the advantages and clinical potential of open-mouth CT scanning in reducing oral artifacts.Methods Fifty-one patients with oral and maxillofacial space-occupying lesions and wearing metallic dentures were enrolled.All of them underwent routine CT scan fist and then enhanced CT scan following insertion of a bite block into the mouth.The related slice of artifacts such as tongue,palate and gum were selected,and in which the region of interest was delineated.The advantages and disadvantages of conventional closed-mouth scanning and open-mouth scanning were discussed by calculating artifact indexes and subjectively scoring the image quality by senior doctors.Results Scanning was successfully performed in all patients.Compared with closed-mouth group,open-mouth group had smaller artifact index(P<0.001)and higher subjective score(P<0.001).The artifacts in the lesion area were reduced in 38 out of 51 cases,and the lesion area was staggered from the metallic artifact level in 12 cases.The open-mouth scanning showed the lesion clearly,with high contrast and the best image quality.Conclusion The open-mouth position can effectively reduce artifacts in CT scanning of patients with space-occupying lesions in the oral,and improve image quality.
