A single institution study of radiation dose received from CT imaging: A comparison to Malaysian NDRL

10th International Seminar on Medical Physics; 1st AMDI International Oncology Symposium

物理学;医药卫生

Osman, N.D.^1 ; Shamsuri, S.B.M.^1,2 ; Tan, Y.W.^3 ; Razali, M.A.S.M.^1 ; Isa, S.M.^1

Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Penang

13200, Malaysia^1

Faculty of Science Technology and Human Development, Universiti Tun Hussein Onn, Johor, Batu Pahat

86400, Malaysia^2

School of Physics, Universiti Sains Malaysia, Minden-Penang

11800, Malaysia^3

关键词: CT scanning;    Ct studies;    CT technology;    Dose distributions;    Dose-length products;    Imaging units;    Local diagnostic reference levels;    Optimisations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/851/1/012003/pdf
DOI  :  10.1088/1742-6596/851/1/012003

学科分类：卫生学

来源: IOP

【 摘 要 】

Advancement of CT technology has led to an increase in CT scanning as it improves the diagnosis. However, it is important to assess health risk of patients associated with ionising radiation received from CT. This study evaluated current dose distributions at Advanced Medical and Dental Institute (AMDI), Malaysia and was used to establish Local Diagnostic Reference Level (LDRL). Dose indicators such as CT Dose Index (CTDIvoland CTDIw) and Dose-Length Product (DLP) were gathered for all routine CT examinations performed at the Imaging Unit, AMDI from January 2015 to June 2016. The first and third quartile values for each dose indicator were determined. A total of 364 CT studies were performed during that period with the highest number of cases being Thorax-Abdomen-Pelvis (TAP) study (57% of total study). The CTDIwranged between 2.0 mGy to 23.4 mGy per procedure. DLP values were ranged between 94 mGy.cm to 1687 mGy.cm. The local dose data was compared with the national DRL to monitor the current CT practice at AMDI and LDRL will be established from the calculated third quartile values of dose distribution. From the results, some of the local dose values exceeded the Malaysian and further evaluation is important to ensure the dose optimisation for patients.