Abstract
In this study, we aimed to estimate the probability of cancer risk induced by CT pulmonary angiography (CTPA) examinations concerning effective body diameter. One hundred patients who underwent CTPA examinations were recruited as subjects from a single institution in Kuala Lumpur. Subjects were categorized based on their effective diameter size, where 19–25, 25–28, and >28 cm categorized as Groups 1, 2, and 3, respectively. The mean value of the body diameter of the subjects was 26.82 ± 3.12 cm, with no significant differences found between male and female subjects. The risk of cancer in breast, lung, and liver organs was 0.009%, 0.007%, and 0.005% respectively. The volume-weighted CT dose index (CTDIvol) was underestimated, whereas the size-specific dose estimates (SSDEs) provided a more accurate description of the radiation dose and the risk of cancer. CTPA examinations are considered safe but it is essential to implement a protocol optimized following the As Low as Reasonably Achievable (ALARA) principle.
Highlights
Computed tomography (CT) scanning has become the most popular imaging technique and the number of exams using this technique is steadily increasing
size-specific dose estimates (SSDEs) values were higher than CTDIvol for each group for both calculation methods
The deviation between SSDE and CTDIvol narrowed as the subjects0 DW increased
Summary
Computed tomography (CT) scanning has become the most popular imaging technique and the number of exams using this technique is steadily increasing. Despite its good diagnostic value for disease visualization, the International Commission for Radiological Protection (ICRP) expressed its concern about the use of CT in advanced medicine and the fact that it can cause cancer risk relative to other imaging methods [1]. CT Pulmonary Angiography (CTPA) is one of the imaging techniques that enables the visualization of pulmonary arteries and the diagnosis and treatment of pulmonary embolism (PE). PE is considered a significant health condition associated with high mortality and it requires rapid and accurate diagnosis, in patients at high risk. More than 90% of appropriate PE tests can be achieved through the development of CT technology [2].
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