Volume 3, Issue 6, November 2017, Page: 54-59
Image Quality and Exposure Control for Over-the-Table X-ray Systems Using a Flat-panel Detector
Jouji Ohta, Department of Radiological Technology, Tohoku University Graduate School of Medicine, Sendai, Japan; Department of Radiological Technology, Chiba University Hospital, Chiba, Japan
Koichi Chida, Department of Radiological Technology, Tohoku University Graduate School of Medicine, Sendai, Japan; Division of Radiation Disaster Medicine, International Research Institute of Disaster Science, Tohoku University, Sendai, Japan
Received: Aug. 16, 2017;       Accepted: Oct. 19, 2017;       Published: Nov. 10, 2017
DOI: 10.11648/j.rst.20170306.11      View  2212      Downloads  126
Quality control (QC) is essential for ensuring that the X-ray images produced by fluoroscopy systems are of sufficient quality to provide adequate diagnostic information consistently with the least possible radiation exposure. However, there are limited data on QC (image quality and radiation exposure) in fluoroscopy systems with over-the-table X-ray tubes. We describe a QC protocol for over-the-table fluoroscopy systems. We checked the image quality of over-the-table system using QC phantoms. In this study, over-the-table X-ray system with a flat-panel detector (FPD) was used. The X-ray outputs (i.e., kVp, mA, pulse width) of over-the-table system were evaluated simultaneously. Some QC data (e.g., radiation output and image quality) were scattered, especially when a smaller QC phantom was used, because AEC errors may occur due to inconsistent measurement geometry. Thus, we recommend the use of a phantom holder and beam-limiting tool with a small QC phantom to maintain the measurement geometry of the phantom and X-ray beam. QC is important for over-the-table fluoroscopy systems, as well as under-the-table systems. We cannot ignore QC in over-the-table systems. Generally, the QC protocol for over-the-table systems should be the same as that for under-the-table systems.
Flat Panel Detector (FPD), Quality Control (QC), Phantom, Fluoroscopy, Angiography, Over-the-Table X-ray Tube, Image Quality, X-ray Dose
To cite this article
Jouji Ohta, Koichi Chida, Image Quality and Exposure Control for Over-the-Table X-ray Systems Using a Flat-panel Detector, Radiation Science and Technology. Vol. 3, No. 6, 2017, pp. 54-59. doi: 10.11648/j.rst.20170306.11
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Kim JH, Kim MJ, Kim HY, Lee MJ. Radiation dose reduction and image quality in pediatric abdominal CT with kVp and mAs modulation and an iterative reconstruction technique. Clin Imaging. 2014; 38 (5): 710-4.
Chida K, Komatsu Y, Sai M, Nakagami A, Yamada T, Yamashita T, Mori I, Ishibashi T, Maruoka S, Zuguchi M. Reduced compression mammography to reduce breast pain. Clin Imaging. 2009; 33 (1):7-10.
Chida K, Zuguchi M, Sai M, Saito H, Yamada T, Ishibashi T, Ito D, Kimoto N, Kohzuki M, Takahashi S. Optimization of tube potential-filter combinations for film-screen mammography: a contrast detail phantom study. Clin Imaging. 2005; 29 (4): 246-50.
Chida K, Sai M, Saito H, Takase K, Zuguchi M, Sasaki M, Sato T. Relationship between the pixel value in digital subtraction angiography and iodine concentration: study in high iodine concentration with original phantom. Tohoku J Exp Med. 2000 Mar; 190 (3): 169-76.
Chida K, Inaba Y, Saito H, Ishibashi T, Takahashi S, Kohzuki M, Zuguchi M. Radiation dose of interventional radiology system using a flat-panel detector. Am J Roentgenol. 2009; 193: 1680–5.
Chida K, Kato M, Kagaya Y, Zuguchi M, Saito H, Ishibashi T, Takahashi S, Yamada S, Takai Y. Radiation dose and radiation protection for patients and physicians during interventional procedure. J Radiat Res. 2010; 51 (2): 97-105.
Chida K, Kato M, Saito H, Ishibashi T, Takahashi S, Kohzuki M, Zuguchi M. Optimizing patient radiation dose in intervention procedures. Acta Radiol. 2010 Feb; 51 (1): 33-9.
International Commission on Radiological Protection (ICRP), ICRP, 2013. Radiological protection in cardiology. ICRP Publication 120. Ann. ICRP 42 (1).
Inaba Y, Chida K, Kobayashi R, Zuguchi M. A cross-sectional study of the radiation dose and image quality of X-ray equipment used in IVR. J Appl Clin Med Phys. 2016 Jul 8; 17 (4): 6231.
Haga Y, Chida K, Inaba Y, Kaga Y, Meguro T, Zuguchi M. A Rotatable Quality Control Phantom for Evaluating the Performance of Flat Panel Detectors in Imaging Moving Objects. J Digit Imaging. 2016 Feb; 29 (1): 38-42.
Wagner LK, Archer BR, Cohen AM. Management of patient skin dose in fluoroscopically guided interventional procedures. J Vasc Interv Radiol 2000; 11: 25–33.
Chida K, Saito H, Zuguchi M, Shirotori K, Kumagai S, Nakayama H, Matsubara K, Kohzuki M. Does digital acquisition reduce patients' skin dose in cardiac interventional procedures? An experimental study. AJR Am J Roentgenol. 2004 Oct; 183 (4): 1111-4.
Chida K, Saito H, Otani H, Kohzuki M, Takahashi S, Yamada S, et al. Relationship between fluoroscopic time, dose–area product, body weight, and maximum radiation skin dose in cardiac interventional procedures. Am J Roentgenol 2006; 186:774–8.
Chida K, Inaba Y, Masuyama H, Yanagawa I, Mori I, Saito H, Maruoka S, Zuguchi M. Evaluating the performance of a MOSFET dosimeter at diagnostic X-ray energies for interventional radiology. Radiol Phys Technol. 2009 Jan; 2 (1): 58-61.
Chida K, Ohno T, Kakizaki S, Takegawa M, Yuuki H, Nakada M, Takahashi S, Zuguchi M. Radiation dose to the pediatric cardiac catheterization and intervention patient. Am J Roentgenol. 2010; 195: 1175–1179.
Inaba Y, Chida K, Kobayashi R, Haga Y, Zuguchi M. Radiation dose of cardiac IVR x-ray systems: a comparison of present and past. Acta Cardiol. 2015; 70 (3): 299-306.
Nakamura M, Chida K, Zuguchi M. Novel Dosimeter Using a Nontoxic Phosphor for Real-Time Monitoring of Patient Radiation Dose Exposure in Interventional Radiology. Am J Roentgenol. 2015; 205 (2): W150-154.
Koenig TR, Mettler FA, Wagner LK. Skin injuries from fluoroscopically guided procedures: part 2, review of 73 cases and recommendations for minimizing dose delivered to patient. Am J Roentgenol 2001; 177: 13–20.
Kato M, Chida K, Sato T, Oosaka H, Tosa T, Munehisa M, Kadowaki K. The necessity of follow-up for radiation skin injuries in patients after percutaneous coronary interventions: radiation skin injuries will often be overlooked clinically. Acta Radiol. 2012; 53 (9): 1040-4.
Chida K, Kaga Y, Haga Y, Kataoka N, Kumasaka E, Meguro T, et al. Occupational dose in interventional radiology procedures. Am J Roentgenol. 2013; 200 (1): 138-41.
Balter S, Miller DL. Fluoroscopically guided interventional procedures: a review of radiation effects on patients' skin and hair. Am J Roentgenol. 2014; 202 (4): W335-42.
Rajaraman P, Doody MM, Yu CL, Preston DL, Miller JS, Sigurdson AJ, Freedman DM, Alexander BH, Little MP, Miller DL, Linet MS. Cancer risks in U.S. radiologic technologists working with fluoroscopically guided interventional procedures, 1994-2008. AJR Am J Roentgenol. 2016 May; 206 (5): 1101-8.
International Commission on Radiological Protection (ICRP), ICRP, 2000. Avoidance of Radiation Injuries from Medical Interventional Procedures. ICRP Publication 85. Ann. ICRP 30 (2).
Chida K, Takahashi T, Ito D, Shimura H, Takeda K, Zuguchi M. Clarifying and visualizing sources of staff-received scattered radiation in interventional procedures. AJR Am J Roentgenol. 2011 Nov; 197 (5): W900-3.
ICRP Statement on Tissue Reactions, April 2011, http://www.icrp.org/page.asp?id=123.
ICRP, 2012 ICRP Statement on Tissue Reactions / Early and Late Effects of Radiation in Normal Tissues and Organs, Threshold Doses for Tissue Reactions in a Radiation Protection Context. ICRP Publication 118. Ann. ICRP 41 (1/2).
Haga Y, Chida K, Kaga Y, Sota M, Meguro T, Zuguchi M. Occupational eye dose in interventional cardiology procedures. Sci Rep. 2017 Apr 3; 7 (1): 569.
JSGI phantom, http://www.testingindonesia.com/detail/796/59/qa-kit-jsgi-phantom.
Chida K, Kaga Y, Haga Y, Takeda K, Zuguchi M. Quality control phantom for flat panel detector X-ray systems. Health Phys. 2013 Jan; 104 (1): 97-101.
Chida K, Kato M, Inaba Y, Kobayashi R, Nakamura M, Abe Y, Zuguchi M. Real-time patient radiation dosimeter for use in interventional radiology. Phys Med. 2016 Nov; 32(11): 1475-8.
Kato M, Chida K, Moritake T, Sato T, Oosaka H, Toyoshima H, Zuguchi M, Abe Y. Direct Dose Measurement On Patient During Percutaneous Coronary Intervention Procedures Using Radiophotoluminescence Glass Dosimeters. Radiat Prot Dosimetry. 2017 Jun 1; 175(1): 31-7.
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