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Radiation Protection of Low Dose CT Scanning in Orbit

Zheng Shu-qing

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Abstract

Objective To study radiation protection of low dose CT scanning in orbit. Methods 126 cases of orbital disease were scanned by original standard parameter (130 kV,100 mA) and two different low dose parameters (130 kV,50 mA and 30 mA) respectively. All the images were reconstructed by different Kernels. The image quality and difference of the CTDIw (weighted CT dose index) of each group were compared. Results CTDIw was 30% of that of the conventional scanning and least when 130 kV 30 mA,but the difference of the image quality compared with that by conventional scanning was highly statistical significance (P0.01);CTDIw was 50% of that of the conventional scanning when 130 kV 50 mA and the difference of the image quality compared with that by conventional scanning had no statistical significance (P0.05). Conclusion Low dose CT scanning (50mA) in orbit not only can assure the image quality but also can decrease the radiation dose.

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What this paper is about

Objective To study radiation protection of low dose CT scanning in orbit. Methods 126 cases of orbital disease were scanned by original standard parameter (130 kV,100 mA) and two different low dose parameters (130 kV,50 mA and 30 mA) respectively. All the images were reconstructed by different Kernels. The image quality and difference of the CTDIw (weighted CT dose index) of each group were compared. Results CTDIw was 30% of that of the conventional scanning and least when 130 kV 30 mA,but the difference of the image quality compared with that by conventional scanning was highly statistical significance (P0.01);CTDIw was 50% of that of the conventional scanning when 130 kV 50 mA and the difference of the image quality compared with that by conventional scanning had no statistical significance (P0.05). Conclusion Low dose CT scanning (50mA) in orbit not only can assure the image quality but also can decrease the radiation dose.

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Available abstract

Objective To study radiation protection of low dose CT scanning in orbit. Methods 126 cases of orbital disease were scanned by original standard parameter (130 kV,100 mA) and two different low dose parameters (130 kV,50 mA and 30 mA) respectively. All the images were reconstructed by different Kernels. The image quality and difference of the CTDIw (weighted CT dose index) of each group were compared. Results CTDIw was 30% of that of the conventional scanning and least when 130 kV 30 mA,but the difference of the image quality compared with that by conventional scanning was highly statistical significance (P0.01);CTDIw was 50% of that of the conventional scanning when 130 kV 50 mA and the difference of the image quality compared with that by conventional scanning had no statistical significance (P0.05). Conclusion Low dose CT scanning (50mA) in orbit not only can assure the image quality but also can decrease the radiation dose.

Key concepts: Radiation dose, Image quality, Medicine, Nuclear medicine, Orbit (dynamics), Significant difference, Statistical significance, Image (mathematics)

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