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:: Volume 19, Issue 7 (7-2017) ::
JBUMS 2017, 19(7): 57-62 Back to browse issues page
Optimization of Image Quality and Patient Dose in Digital Radiography of the Chest
R Paydar , SH Mousavie Anijdan , A Khorrami Moghaddam , I Mohammadi , R Reiazi
Department of Radiation Technology, Allied Medicine Faculty, Babol University of Medical Sciences, Babol, I.R.Iran , shmosavia@mubabol.ac.ir
Abstract:   (1225 Views)

BACKGROUND AND OBJECTIVE: Digital systems have been replacing with screen-film analogue systems in diagnostic radiology departments, rapidly. Despite the differences in the properties of new x-ray imaging detectors, the same radiographic protocols that had been used for radiographic film-screen are used for digital imaging systems, without any review yet. In this study, the image quality and the patient dose in digital imaging of the chest are evaluated and optimized.
METHODS: Two digital radiography machines from two separated hospitals (Imam Khomeini and Bu Ali Hospitals-Sari) have been used in this experimental research. Imaging and dose measurement are carried out at different source to phantom distances and kilo-voltages. For measurement of the image quality, a contrast-detail radiography (CDRAD) phantom is used. For evaluation of optimization, the Inverse Image Quality Figure per patient dose squared (IQFinv/E2) is used.
FINDINGS: Evaluation of measured data for optimization shows that for both of these two digital radiography machines, despite of increasing in patent dose, with reducing of kilo-voltage, the IQFinv/E2 is increased. The maximum values of this parameter for Imam Khomeini and Bu Ali Hospitals are measured 0.0180 and 0.0083, respectively. 
CONCLUSION: The results of this study indicate that despite the traditional notion of using higher kilo-voltages for chest radiography, with increasing kilo-voltage, the ratio of image quality per patient dose is reduced. So, for optimization of chest radiography, as much as possible the kilo-voltage should be reduced based on the size of patient and clinical purpose.

Keywords: Digital radiography, Chest radiography, Contrast-Detail Phantom, Optimization
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Type of Study: Experimental | Subject: Ph
Received: 2017/03/13 | Accepted: 2017/07/9 | Published: 2017/07/30
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Paydar R, Mousavie Anijdan S, Khorrami Moghaddam A, Mohammadi I, Reiazi R. Optimization of Image Quality and Patient Dose in Digital Radiography of the Chest . JBUMS. 2017; 19 (7) :57-62
URL: http://jbums.org/article-1-6691-en.html


Volume 19, Issue 7 (7-2017) Back to browse issues page
مجله علمی دانشگاه علوم پزشکی بابل Journal of Babol University of Medical Sciences

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