兰州大学机构库 >第二临床医学院
COMPUTED TOMOGRAPHY DOSE INDEX MEASUREMENT FOR HI-ART MEGAVOLTAGE HELICAL CT
Liu, ML; Wang, YL; Liao, XF; Wang, YL (reprint author), Peoples Liberat Army Gen Hosp, Dept Radiat Oncol, 28 Fuxing Rd, Beijing 100853, Peoples R China.
Indexed BySCIE ; PubMed ; MEDLINE
2016-11-01
Source PublicationRADIATION PROTECTION DOSIMETRY
Volume171Issue:3Pages:370-374
PublisherOXFORD UNIV PRESS
Publication PlaceOXFORD
AbstractOn-line megavoltage computed tomography (MVCT) images are used to verify patient daily set-up in Hi-ART helical TomoTherapy unit. To evaluate the patient dose from MVCT scanning in image guidance, weighted computed tomography (CT) dose index (CTDIw) was measured with PTW TM30009 CT pencil chamber in head and body phantoms for slice thicknesses of 2, 4 and 6 mm with different scan lengths. Dose length products (DLPs) were subsequently calculated. The CTDIw and DLP were compared with XVI kV CBCT and Brilliance simulator CT for routine clinical protocols. It was shown that CTDI and DLP had close relationship with the slice thickness and the scan length. The dose distribution in the transversal plane was very inhomogeneous due to the attenuation of the couch. Patient dose from MVCT was lower than XVI CBCT for the head scan, while larger for body scan. CTDIw, which is measured easily and reproducibly, can be used to assess the patient dose in MVCT. Regular measurement should be performed in QA & QC programmes. Appropriate slice thickness and scan range should be chosen to reduce the patient dose.
Department[Liu, Minglu] Lanzhou Univ, Clin Hosp 2, Lanzhou 730000, Peoples R China;
[Liu, Minglu] Natl Def Univ PLA, Out Patient Dept 2, Beijing 100039, Peoples R China;
[Wang, Yunlai] Peoples Liberat Army Gen Hosp, Dept Radiat Oncol, 28 Fuxing Rd, Beijing 100853, Peoples R China;
[Liao, Xiongfei] Sichuan Canc Hosp, Dept Radiat Oncol, Chengdu 610041, Peoples R China
Subject AreaEnvironmental Sciences & Ecology ; Public, Environmental & Occupational Health ; Nuclear Science & Technology ; Radiology, Nuclear Medicine & Medical Imaging
DOI10.1093/rpd/ncv393
ISSN0144-8420
SubtypeArticle
Language英语
WOS IDWOS:000393174900011
PMID 26656075
IRIDWOS:000393174900011
First Inst
Citation statistics
Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/188696
Collection第二临床医学院
Corresponding AuthorWang, YL (reprint author), Peoples Liberat Army Gen Hosp, Dept Radiat Oncol, 28 Fuxing Rd, Beijing 100853, Peoples R China.
Recommended Citation
GB/T 7714
Liu, ML,Wang, YL,Liao, XF,et al. COMPUTED TOMOGRAPHY DOSE INDEX MEASUREMENT FOR HI-ART MEGAVOLTAGE HELICAL CT[J]. RADIATION PROTECTION DOSIMETRY,2016,171(3):370-374.
APA Liu, ML,Wang, YL,Liao, XF,&Wang, YL .(2016).COMPUTED TOMOGRAPHY DOSE INDEX MEASUREMENT FOR HI-ART MEGAVOLTAGE HELICAL CT.RADIATION PROTECTION DOSIMETRY,171(3),370-374.
MLA Liu, ML,et al."COMPUTED TOMOGRAPHY DOSE INDEX MEASUREMENT FOR HI-ART MEGAVOLTAGE HELICAL CT".RADIATION PROTECTION DOSIMETRY 171.3(2016):370-374.
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