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Sensors 2017, 17(3), 531; doi:10.3390/s17030531

Development of Portable Digital Radiography System with a Device for Monitoring X-ray Source-Detector Angle and Its Application in Chest Imaging

Imaging Science Research Center, Wonkwang University, 460 Iksandeaero, Iksan, Jeonbuk 54538, Korea
Department of Radiology, Wonkwang University School of Medicine, 460 Iksandeaero, Iksan, Jeonbuk 54538, Korea
Author to whom correspondence should be addressed.
Academic Editors: Ioannis Kompatsiaris, Thanos G. Stavropoulos and Antonis Bikakis
Received: 15 December 2016 / Revised: 28 February 2017 / Accepted: 2 March 2017 / Published: 7 March 2017
(This article belongs to the Special Issue Sensors for Ambient Assisted Living, Ubiquitous and Mobile Health)
View Full-Text   |   Download PDF [7719 KB, uploaded 7 March 2017]   |  


This study developed a device measuring the X-ray source-detector angle (SDA) and evaluated the imaging performance for diagnosing chest images. The SDA device consisted of Arduino, an accelerometer and gyro sensor, and a Bluetooth module. The SDA values were compared with the values of a digital angle meter. The performance of the portable digital radiography (PDR) was evaluated using the signal-to-noise (SNR), contrast-to-noise ratio (CNR), spatial resolution, distortion and entrance surface dose (ESD). According to different angle degrees, five anatomical landmarks were assessed using a five-point scale. The mean SNR and CNR were 182.47 and 141.43. The spatial resolution and ESD were 3.17 lp/mm (157 μm) and 0.266 mGy. The angle values of the SDA device were not significantly difference as compared to those of the digital angle meter. In chest imaging, the SNR and CNR values were not significantly different according to the different angle degrees. The visibility scores of the border of the heart, the fifth rib and the scapula showed significant differences according to different angles (p < 0.05), whereas the scores of the clavicle and first rib were not significant. It is noticeable that the increase in the SDA degree was consistent with the increases of the distortion and visibility score. The proposed PDR with a SDA device would be useful for application in the clinical radiography setting according to the standard radiography guidelines. View Full-Text
Keywords: portable digital radiography (PDR) system; X-ray source-detector angle (SDA); radiography setting portable digital radiography (PDR) system; X-ray source-detector angle (SDA); radiography setting

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Kim, T.-H.; Heo, D.-W.; Jeong, C.-W.; Ryu, J.-H.; Jun, H.Y.; Han, S.-J.; Ha, T.; Yoon, K.-H. Development of Portable Digital Radiography System with a Device for Monitoring X-ray Source-Detector Angle and Its Application in Chest Imaging. Sensors 2017, 17, 531.

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