Didital Video Camera System

Morimura,; Uomori,; Kitamura,; Fujioka,; Harada$^{, }$; Iwamura,; Hirota,

doi:10.1109/icce.1990.665962

IEEE International Conference on Consumer Electronics 1990

DOI: 10.1109/icce.1990.665962

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Didital Video Camera System

Morimura Morimura¹,

Uomori Uomori²,

Kitamura Kitamura

et al.

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2010

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Geometric averaging of X-ray signals in automatic exposure control

Snoeren

2010

2010 IEEE International Conference on Image Processing

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Improper dose control in X-ray cardio-vascular systems leads to a reduced Signal-to-Noise Ratio (SNR) in regions of interest of the X-ray image. We aim at reducing the influence of direct radiation, entering a measuring field for X-ray dose control in a Flat Detector which gives too bright areas (highlights) in the image. It is our desire to use a norm-like signal size that represents a minimal dose value while maximizing information transfer and thus image quality. In a dose control system, it is common practice to employ a special averaging technique for computing a representative signal level controlling the X-ray. We have found that the geometric averaging outperforms the existing techniques and significantly improves the image quality. Our approach reduces the highlight influence and guarantees an adequate Contrast-to-Noise ratio for decentered objects. We provide convincing experimental results showing a strongly improved image quality with respect to contrast and detail.Index Terms-X-ray, cone beam CT, dose control, signal size, image quality.

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Geometric averaging of X-ray signals in automatic exposure control

Snoeren

2010

2010 IEEE International Conference on Image Processing

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show abstract

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Didital Video Camera System

Cited by 1 publication

References 0 publications

Geometric averaging of X-ray signals in automatic exposure control

Geometric averaging of X-ray signals in automatic exposure control

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