PROBLEM TO BE SOLVED: To provide an X-ray detector and an X-ray CT apparatus capable of preventing temperature rise in a detection module having a sealed structure.SOLUTION: The X-ray detector comprises: a detection module 70 that includes a substrate 71 on which are mounted an X-ray transducer 72 for converting an X-ray into an electrical signal and an ADC 73 for converting the electrical signal from an analog signal into a digital signal, and that generates data by conversion into digital signal a shielding member 85 that is disposed to surround the detection module 70, allows X-rays to pass therethrough, and shields light in a wavelength region to be converted by the X-ray transducer 72 a cable 80 for transmitting the data generated by the detection module 70 and a heat radiation member 81 having a thermal conductivity. One end side of the heat radiation member 81 is disposed inside the shielding member 85 in a state of contacting the detection module 70 and the other end side is disposed outside the shielding member 85 to transfer heat generated in the detection module 70 from the one end side to the other end side.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2018,JPO&INPIT【課題】密閉構造を有する検出モジュールにおいて、温度上昇を防ぐことができるX線検出器及びX線CT装置を提供する。【解決手段】X線を電気信号に変換するX線変換素子72と、前記電気信号をアナログ信号からデジタル信号に変換するADC73とが実装された基板71を有し、前記デジタル信号への変換によりデータを生成する検出モジュール70と、検出モジュール70を包囲して配置され、X線を透過し、X線変換素子72で変換される波長域の光を遮蔽する遮蔽部材85と、検出モジュール70で生成されたデータを伝送するケーブル80と、熱伝導性を有する放熱部材81とを備え、放熱部材81は、検出モジュール70に一端部側が接触して遮蔽部材85内に配置され、他端部側が遮蔽部材85外に配置され、検出モジュール70で発生した熱を一端部側から他端部側へ伝達する。【選択図】 図3
