Reduction in exposure to scattered radiation is being widely investigated by interventional radiologists (1–4).
For magnification of images using vascular imaging systems, the digital zoom function enables acquisition of a magnified visual field while inhibiting the radiation exposure (5–6).
The aim of this study was to evaluate the radiation exposure in the use of vascular imaging systems and assess the catheter visibility under digital magnification by both Inch Up and Digital Zoom systems (Fig. 1).
Description of activity and work performed
Materials and methods
The radiation dose was measured at the interventional reference point by Inch Up (19-inch, 17-inch, 14.4-inch, 13-inch) and digital zoom function (1.3×, 1.45×, 1.7×) with Interventional Angiography Systems (Azurion 7 B20/15, Philips) (Fig. 2).
The same fluoroscopy conditions as those in the routine clinical practice (low 6.25 f/s）were used for imaging including that of the catheters and guide wire (Fig. 3).
Visibilities of the catheters and guide wire were evaluated by five radiologists. Under a fixed evaluation environment, images that underwent a...
Conclusion and recommendations
The digital zoom function achieved reduction in radiation exposure without significant differences in visibility.
Investigators should consider digital zoom a potential tool for achieving reduction in radiation exposure.
K. Matsunari; Yokohama/JP - nothing to disclose A. Kotake; Yokohama/JP - nothing to disclose N. Hashizume; Yokohama/JP - nothing to disclose K. Watanabe; Yokohama, JP/JP - nothing to disclose D. Murakami; Yokohama/JP - nothing to disclose H. Fujisawa; Yokohama/JP - nothing to disclose
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