Computed Tomography: Safe with Standardised Criteria

Congress:

EuroSafe Imaging 2017

Poster Number:

ESI-0007

Type:

EuroSafe Imaging

Keywords:

CT, Radioprotection / Radiation dose, Radiation physics, Action 13 - Stakeholder engagement and collaboration, Action 5 - Performance indicators for radiation protection management, Action 2 - Clinical diagnostic reference levels (DRLs), Action 12 - Cooperation with international radiation protection initiatives and other stakeholders including IAEA, WHO, ICRP, HERCA, European Commission, Action 9 - Development of criteria for safe imaging procedures, Action 3 - Optimisation, diagnostic reference levels, image quality, Diagnostic procedure, Radiation safety, Quality assurance

Authors:

M. R. Onur, A. D. Karaosmanoglu, E. Akpinar, M. Karcaaltincaba, D. Akata, M. N. Özmen

DOI:

10.1594/esi2017/ESI-0007

DOI-Link:

https://dx.doi.org/10.1594/esi2017/ESI-0007

Fig. 1: Patient is placed in isocenter of the X-ray beam.

Fig. 2: Improper centering. Patient is in lower position to the isocenter.

Fig. 3: Improper position. Patient is in higher position to the isocenter.

Background/Introduction

Learning Objectives: Standardization of computed tomography (CT) protocols in radiology departments. Main parameters to standardize CT scanners Optimize the radiation dose without sacrificing mage quality CT: 19% of all X-ray based studies 49% of all medical radiation Minimize radiation burden Diagnostic quality Safe CT: Appropriate clinical indications Examination-specific scan protocols (patient demographics, body region) In-depth knowledge of radiation dose parameters in CT Optimize dose parameters CT parameters for standardization of CT protocols in a radiology department between different CT scanners Detector configuration Tube current Tube...

Description of activity and work performed

Parameters affecting the radiation dose Consequences of their modification 1. Detector configuration Number of data channels in the z-axis Effective detector thickness of each of these data channel Detector configurations on different equipments numberof data channels type of data channels manner of data channel combinations in a detector array Radiation dose emitted from X-ray tube Tube potential Tube current Detector configuration 2. Tube Current Increased tube current Decreased image noise Increased radiation dose Increased image quality Automatic tube current modulation (ATCM)increase the mAs to increase...

Conclusion and Recommendations

Imaging specialists should be familiar with fundamental basics of medical physics in order to promote optimal radiation dose usage without sacrificing the image quality Standardization of scan protocols between different scanners and educating the radiology technologists properly have a great potential for optimizing the radiation dose and decreasing the variability within the same department.

Personal/Organisational information

1. Mehmet Ruhi Onur1, M.D. 2. Ali Devrim Karaosmanoglu1, M.D. 3.Erhan Akpinar,1, M.D. 5.Musturay Karcaatincaba1, M.D. 6. Deniz Akata1, M.D. 0 0 1 123 702 Hacettepe University School of Medicine 5 1 824 14.0 96 800x600 Normal 0 false false false EN-US JA X-NONE 7. Mustafa Özmen1, M.D. 1Hacettepe University Faculty of Medicine, Department of Radiology, Ankara, Turkey

References

1.Raman SP, Mahesh M, Blasko RV, Fishman EK.CT scan parameters and radiation dose: practical advice for radiologists.J Am Coll Radiol. 2013 Nov;10(11):840-6. 2.Costello JE, Cecava ND, Tucker JE, Bau JL.CT radiation dose: current controversies and dose reduction strategies. AJR Am J Roentgenol. 2013 Dec;201(6):1283-90. 3.Lell MM, Wildberger JE, Alkadhi H, Damilakis J, Kachelriess M. Evolution in Computed Tomography: The Battle for Speed and Dose. Invest Radiol. 2015 Sep;50(9):629-44.