Halve the dose while maintaining image quality in paediatric Cone Beam CT

被引：59

作者：

Oenning, Anne Caroline ^{[1
,2
,3
]}

Pauwels, Ruben ^{[4
,5
,6
,7
]}

Stratis, Andreas ^{[6
,7
]}

Vasconcelos, Karla De Faria ^{[6
,7
]}

Tijskens, Elisabeth ^{[6
,7
]}

De Grauwe, Annelore ^{[6
,7
]}

Jacobs, Reinhilde ^{[6
,7
,8
]}

Salmon, Benjamin ^{[1
,2
]}

Chaussain, Catherine ^{[1
,2
]}

Bosmans, Hilde ^{[6
,7
]}

Bogaerts, Ria ^{[6
,7
]}

Politis, Constantinus ^{[6
,7
]}

Nicolielo, Laura ^{[6
,7
]}

Zhang, Guozhi ^{[6
,7
]}

Vranckx, Myrthel ^{[6
,7
]}

Ockerman, Anna ^{[6
,7
]}

Baatout, Sarah ^{[9
]}

Bemans, Niels ^{[9
]}

Moreels, Marjan ^{[9
]}

Hedesiu, Mihaela ^{[10
]}

Virag, Pirsoka ^{[10
]}

Baciut, Mihaela ^{[10
]}

Marcu, Maria ^{[10
]}

Almasan, Oana ^{[10
]}

Roman, Raluca ^{[10
]}

Barbur, Ioan ^{[10
]}

Dinu, Cristian ^{[10
]}

Rotaru, Horatiu ^{[10
]}

Hurubeanu, Lucia ^{[10
]}

Istouan, Vlad ^{[10
]}

Lucaciu, Ondine ^{[10
]}

Leucuta, Daniel ^{[10
]}

Crisan, Bogdan ^{[10
]}

Bogdan, Loredana ^{[10
]}

Candea, Ciprian ^{[10
]}

Bran, Simion ^{[10
]}

Baciut, Grigore ^{[10
]}

机构：

[1] Paris Descartes Univ, Sorbonne Paris Cite, EA Orofacial Pathol Imaging & Biotherapies Lab 24, Montrouge, France

[2] Bretonneau Hosp, AP HP, Dent Med Dept, HUPNVS, Paris, France

[3] Fac Sao Leopoldo Mandic, Inst Pesquisas Sao Leopoldo Mandic, Div Oral Radiol, Campinas, SP, Brazil

[4] Katholieke Univ Leuven, Dept Mech Engn, Leuven, Belgium

[5] Chulalongkorn Univ, Fac Dent, Dept Radiol, Bangkok, Thailand

[6] Univ Leuven, Fac Med, Dept Imaging & Pathol, OMFS IMPATH Res Grp, Leuven, Belgium

[7] Univ Hosp Leuven, Oral & Maxillofacial Surg, Leuven, Belgium

[8] Karolinska Inst, Dept Dent Med, Stockholm, Sweden

[9] SCK CEN, Belgian Nucl Res Ctr, Radiobiol Unit, Lab Mol & Cellular Biol,Inst Environm Hlth & Safe, B-2400 Mol, Belgium

[10] Iuliu Hatieganu Univ Med & Pharm, Fac Dent, Dept Oral Radiol, Cluj Napoca, Romania

来源：

SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期

关键词：

DENTISTRY; CBCT;

D O I：

10.1038/s41598-019-41949-w

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Cone beam CT (CBCT) for dentomaxillofacial paediatric assessment has been widely used despite the uncertainties of the risks of the low-dose radiation exposures. The aim of this work was to investigate the clinical performance of different CBCT acquisition protocols towards the optimization of paediatric exposures. Custom-made anthropomorphic phantoms were scanned using a CBCT unit in six protocols. CT slices were blinded, randomized and presented to three observers, who scored the image quality using a 4-point scale along with their level of confidence. Sharpness level was also measured using a test object containing an air/PMMA e,dge. The effective dose was calculated by means of a customized Monte Carlo (MC) framework using previously validated paediatric voxels models. The results have shown that the protocols set with smaller voxel size (180 mu m), even when decreasing exposure parameters (kVp and mAs), showed high image quality scores and increased sharpness. The MC analysis showed a gradual decrease in effective dose when exposures parameters were reduced, with an emphasis on an average reduction of 45% for the protocol that combined 70 kVp, 16 mAs and 180 mu m voxel size. In contrast, both "ultra-low dose" protocols that combined a larger voxel size (400 mu m) with lower mAs (7.4 mAs) demonstrated the lowest scores with high levels of confidence unsuitable for an anatomical approach. In conclusion, a significant decrease in the effective dose can be achieved while maintaining the image quality required for paediatric CBCT.

引用

页数：9

共 26 条

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