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http://dx.doi.org/10.7742/jksr.2021.15.3.301

Comparison of CT Image Performance with or without Tin Filter based on Blind Image Quality Evaluation Method  

Shim, Jina (Department of Radiology, Severacnce hospital)
Lee, Youngjin (Department of Radiological Science, College of Health Science, Gachon University)
Publication Information
Journal of the Korean Society of Radiology / v.15, no.3, 2021 , pp. 301-306 More about this Journal
Abstract
The use of tin filters as a way to reduce the medical radiation in computed tomography (CT). However, due to the changed X-ray spectrum with the use of tin filters, disease diagnosis could be affected because it appears as images of different impressions from previous images. Therefore, this study evaluates the changes in images when using tin filter and high pitch in chest low-dose CT. In this study, images were acquired in groups of three for comparison. Group 1 did not apply to tin filter, and used the existing pitch 0.8. Group 2 used a tin filter, pitch 0.8, Group 3 used a tin filter, and pitch 2.5. To compare the image quality, the natural image quality evaluator (NIQE) and the blind/referenceless image quality evaluator (BRISQUE) were used among the blind quality evaluation factors depended on a no-reference basis. As a result, the NIQE values were low in the order of Group 1, Group 3, and Group 2. BRISQUE values were low in the order of Group 3, Group 2 and Group 1. This study confirms the superiority of images of tin filter and high pitch techniques in chest low-dose CT, which is considered to be a fundamental study for acquiring accurate images of patients with difficult breathing control.
Keywords
Computed tomography; Tin filter; High pitch; Quantitative evaluation of image quality;
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