Abstract:
본 발명은 아날로그 신호 보정 회로에 관한 것으로서 OP 앰프를 포함하고, OP 앰프의 입력단에 입력 전압이 입력되는 전압 복원부, OP 앰프의 다른 입력단에 연결된 상승시간 복원부, 및 OP 앰프의 출력단에 연결된 하강시간 복원부를 포함하는 것을 특징으로 하며, 케이블 길이에 따른 출력 신호 왜곡현상을 아날로그 신호 보정 회로를 이용하여 원 신호로 보정함으로써, 케이블을 사용하여 아날로그 신호를 전송하는 의료영상기기 및 의료영상기기 중 PET-MRI 융합 시스템의 PET 검출기에서의 성능저하를 개선할 수 있다.
Abstract:
The present invention relates to an analog signal correcting circuit. The invention includes an OP amplifier, a voltage restoring part inputting an input voltage to an input terminal of the amplifier, an increasing time restoring part connected with the other input terminal of the amplifier, and a decreasing time restoring part connected with an output terminal of the amplifier. As an output signal distortion phenomenon according to a cable length is corrected into an original signal by using the analog signal correcting circuit, the performance degradation of both a PET detector in a PET-MRI fusion system and a medical image device transmitting an analog signal by using a cable is improved. [Reference numerals] (C1) Input resistance;(C2) Low pass filter capacity;(R1) High pass filter capacity;(R2) Feedback resistance;(R3) High pass filter capacity;(R4) Amplifying stage resistance;(R5) Low pass filter resistance;(R6) Output resistance
Abstract:
PURPOSE: A radiation image device capable of wirelessly transmitting data is provided to prevent a user from being exposed to radiation by controlling a signal processing part to implement a long distance transmission. CONSTITUTION: A detection part converts emitted radiation into a flashlight signal. The detection part converts the converted flashlight signal into an electric signal. A signal amplification part (120) amplifies the electric signal. A data transmission part (130) wirelessly transmits the electric signal to a signal processing part. The signal processing part (150) converts the electric signal into an image signal. [Reference numerals] (100) Signal acquisition part; (110) Extracting part; (120) Signal amplification part; (125) Data acquisition part; (130) Data transmission part; (150) Signal processing part; (160) Receiving part; (165) Signal transceiving part; (170) Displaying part
Abstract:
PURPOSE: A method for reconstructing an image using single layered scintillation crystal is provided to improve the accuracy of information by recording a program. CONSTITUTION: A single layered scintillation crystal is classified by a pair of scintillation crystals(300). A discharged photon from a pixel position is calculated with conditional probability in the scintillation crystals(310). The number of photons is estimated using the total number of the photons in conditional probability(320). An image is reconstructed by using the estimated number of the photons(330). An image reconstruction algorithm is applied for image reconstruction. [Reference numerals] (300) Classifying a single layered scintillation crystal into a pair of scintillation crystals, assuming the single layered scintillation crystal as a multilayered scintillation crystal; (310) Calculating conditional probability to observe a photon discharged in a pixel position within even pattern located in a view range; (320) Estimating the number of photons from the pair of scintillation crystal using the total number of the photons observed in the single layered scintillation crystal; (330) Reconstructing image by applying an image reconstruction algorithm using the estimated number of the photons; (AA) Start; (BB) End