Radiation detection device and radiation detection system

Abstract

The invention relates to a radiation detection device and a radiation detection system. The radiation detection device comprises a substrate, a pixel region, and a light source. The pixel region is formed by one or more pixel including a sensor element on the substrate. The light source is disposed on a side of the substrate which is provided with the pixel region and is outside the pixel region. Light from the light source enters the sensor element.

Description

technical field [0001] The present invention relates to a radiation detection device, and in particular, to a radiation detection device and a radiation detection system used in medical X-ray diagnostic equipment, nondestructive inspection equipment, and the like using a photoelectric conversion unit. In this specification, "light" includes not only visible light, ultraviolet light, and infrared light but also radiation such as X-rays and γ-rays. Background technique [0002] With recent advances in digital technology, radiation detection equipment that processes X-ray images as digital data has been extensively researched and developed. Radiation detection apparatuses that process X-ray images as digital data are classified into direct conversion systems and indirect conversion systems. A direct system (direct conversion system) is a system that directly converts X-rays into electrical signals using a photoelectric conversion element sensitive to the X-ray band. On the ot...

AI Technical Summary

Problems solved by technology

However, applying this method to radiation detection equipment has problems of increasing the image acquisition interval and reducing the convenience of using the equipment

In particular, in the case of repeatedly irradiating X-rays to a detector to form a moving image, there arises a problem that the dark current cannot be sufficiently reduced in the short time between repeated irradiation of radiation to the detector.

[0012] (1) The configuration of US Patent Application Publication 2002 / 02024016 makes the light source protrude toward the side or back side of the substrate (also referred to as the sensor substrate), whereby the radiation detection apparatus has a large size

[0013] (2) The configuration of US Patent No. 4,980,553 makes the photoelectric conversion element susceptible to noise caused by the light source due to the arrangement of the light source and the photoelectric conversion element, thereby causing image instability

[0014] (3) The configuration of U.S. Patent Application Publication 2009 / 0283685 is such that the light from the light source is absorbed or scattered on the optical path due to the wavelength converter, whereby the light reaching the photoelectric conversion element may be attenuated

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