engleski

Dose Optimization of CT Thorax Exam in University Clinical Hospital Mostar

Aim To determine the impact of decreasing patient dose on image quality or diagnostic information during diagnostic thorax examination using computed tomography/CT/at University Clinical Hospital Mostar/UCH/. Methods Images were acquired using a CT General Electric LightSpeed 16 slice scanner. There were 62 adult patients with different input diagnoses involved in this research, which lasted from March 1st 2018 to June 1st 2018. After determination of patient dose, the objective was optimization of protocol parameters for the purpose of lowering the dose received by patients, in a manner that does not jeopardize image I. Lasić (&) Medical Physics and Radiation Protection Office, University Clinical Hospital Mostar, Bijeli Brijeg bb, 8800 Mostar, Bosnia and Herzegovina e-mail: Ivan.lasic.phy@gmail.com K. Galić Department for Lung Diseases, University Clinical Hospital Mostar, Bijeli Brijeg bb, 8800 Mostar, Bosnia and Herzegovina Department for Internal Diseases, University of Mostar School of Medicine, Bijeli Brijeg bb, 8800 Mostar, Bosnia and Herzegovina A. Beganović Department of Radiation Protection and Medical Physics, Clinical Centre of Sarajevo University, Bolnička 25, 71000 Sarajevo, Bosnia and Herzegovina Faculty of Science, University of Sarajevo, Zmaja od Bosne 33-35, 71000 Sarajevo, Bosnia and Herzegovina V. Lasić Department for Pediatric Surgery, University Clinical Hospital Mostar, Bijeli Brijeg bb, 8800 Mostar, Bosnia and Herzegovina L. Čiva Sarajevo School of Science and Technology, Sarajevo Medical School, Hrasnička cesta 3a, 71210 Ilidža, Bosnia and Herzegovina A. Krasić-Arapović Department for Radiology, University Clinical Hospital Mostar, Bijeli Brijeg bb, 8800 Mostar, Bosnia and Herzegovina © Springer Nature Switzerland AG 2020 A. Badnjevic et al. (eds.), CMBEBIH 2019, IFMBE Proceedings 73, https://doi.org/10.1007/978-3- 030-17971-7_18 quality or diagnostic information. A thoracic radiologist using a double-stimulation method assessed image quality according to the European Guidelines on image quality criteria for CT 16262/EUR16262 EN/, followed by calculation of dose efficiency factor figure of merit/FOM/. Results Changing the protocol parameters enabled a significantly decreased patient dose. Visualization of pulmonary anatomical structures was not significantly changed by decreasing the dose. The mean FOM before optimization was 1.28 mSv −1 and 2.46 mSv after optimization (p < 0.001). Conclusion By changing the parameters of the protocol a significant dose reduction was achieved without affecting the diagnostic information.

Dose, CTDI, Optimization, DLP, Computerized tomography, CT thorax exam, FOM

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