A study of the effect of X-ray tube voltage on image quality and radiation dose

LIN Yu-ning; GAO Kai; DENG Zhen-sheng; MOU Xuan-qin; YU Hou-jun; ZHANG Xue-xin; SUN Li-jun

Journal of China Clinic Medical Imaging ›› 2006, Vol. 17 ›› Issue (9) : 530-533.

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A study of the effect of X-ray tube voltage on image quality and radiation dose

LIN Yu-ning1, GAO Kai1, DENG Zhen-sheng1, MOU Xuan-qin2, YU Hou-jun1, ZHANG Xue-xin1, SUN Li-jun1

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Abstract

Objective: To study the correlation among X-ray tube voltage, image quality and radiation dose. Methods: Radiographic images were acquired by employing the phantom with 25 pairs of vessels containing iodine at concentration between 4.0~50mg/ml. Curve fitting was used to find and evaluate the correlation among X-ray tube voltage, image quality and surface dose of the phantom. Results: The decrease of image quality is less significant than that of surface dose while the tube voltage increased from 54 to 85kVp, and the decline of surface dose was not evident whereas the decline of image quality was substantial when the tube voltage increased over 85kV. Conclusion: On the basis of some specific thickness of phantom, the optimized value of tube voltage that both satisfy the image quality and the minimum surface dose of phantom can be obtained by means of curve fitting and studying the correlation among them.

Key words

angiography / digital subtraction / phantoms / imaging

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LIN Yu-ning;GAO Kai;DENG Zhen-sheng;MOU Xuan-qin;YU Hou-jun;ZHANG Xue-xin;SUN Li-jun. A study of the effect of X-ray tube voltage on image quality and radiation dose[J]. Journal of China Clinic Medical Imaging. 2006, 17(9): 530-533