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Information Journal Paper

Title

OPTIMIZATION OF PARAMETERS IN 16-SLICE CT-SCAN PROTOCOLS FOR REDUCTION OF THE ABSORBED DOSE

Pages

  270-275

Keywords

COMPUTED TOMOGRAPHY (CT) 

Abstract

 Introduction: In computed tomography (CT) technology, an optimal radiation dose can be achieved via changing radiation parameters such as mA, pitch factor, rotation time and tube voltage (kVp) for diagnostic images.Materials and Methods: In this study, the brain, abdomen, and thorax scaning was performed using Toshiba 16-slice scanner and standard AAPM and CTDI phantoms. AAPM phantom was used for the measurement of image-related parameters and CTDI phantom was utilized for the calculation of ABSORBED DOSE to patients. Imaging parameters including mA (50-400 mA), pitch factor (1 and 1.5) and rotation time (range of 0.5, 0.75, 1, 1.5 and 2 seconds) were considered as independent variables. The brain, abdomen and chest imaging was performed multi-slice and spiral modes. Changes in image quality parameters including contrast resolution (CR) and spatial resolution (SR) in each condition were measured and determined by MATLAB software.Results: After normalizing data by plotting the full width at half maximum (FWHM) of point spread function (PSF) in each condition, it was observed that image quality was not noticeably affected by each cases. Therefore, in brain scan, the lowest patient dose was in 150 mA and rotation time of 1.5 seconds. Based on results of scanning of the abdomen and chest, the lowest patient dose was obtained by100 mA and pitch factors of 1 and 1.5.Conclusion: It was found that images with acceptable quality and reliable detection ability could be obtained using smaller doses of radiation, compared to protocols commonly used by operators.

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    APA: Copy

    NASERI, SHAHROKH, MOMEN NEZHAD, MAHDI, HOZHABRI, ZAHRA, HAGHPARAST, ABBAS, KARAMI, GOLESTAN, & HEJAZI, PEYMAN. (2014). OPTIMIZATION OF PARAMETERS IN 16-SLICE CT-SCAN PROTOCOLS FOR REDUCTION OF THE ABSORBED DOSE. IRANIAN JOURNAL OF MEDICAL PHYSICS, 11(2-3), 270-275. SID. https://sid.ir/paper/636029/en

    Vancouver: Copy

    NASERI SHAHROKH, MOMEN NEZHAD MAHDI, HOZHABRI ZAHRA, HAGHPARAST ABBAS, KARAMI GOLESTAN, HEJAZI PEYMAN. OPTIMIZATION OF PARAMETERS IN 16-SLICE CT-SCAN PROTOCOLS FOR REDUCTION OF THE ABSORBED DOSE. IRANIAN JOURNAL OF MEDICAL PHYSICS[Internet]. 2014;11(2-3):270-275. Available from: https://sid.ir/paper/636029/en

    IEEE: Copy

    SHAHROKH NASERI, MAHDI MOMEN NEZHAD, ZAHRA HOZHABRI, ABBAS HAGHPARAST, GOLESTAN KARAMI, and PEYMAN HEJAZI, “OPTIMIZATION OF PARAMETERS IN 16-SLICE CT-SCAN PROTOCOLS FOR REDUCTION OF THE ABSORBED DOSE,” IRANIAN JOURNAL OF MEDICAL PHYSICS, vol. 11, no. 2-3, pp. 270–275, 2014, [Online]. Available: https://sid.ir/paper/636029/en

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