99‐2: A Compact Fully a‐Si:H TFT‐Based Active Pixel Sensor Circuit for High‐Resolution Low‐Dose Medical Imaging

In this paper, we proposed a compact fully a‐Si:H thin‐film transistor (TFT)‐based active pixel sensor (APS) circuit using photo‐TFT (PT) as sensor device, which is compatible with existing display panel fabrication process. By multiplexing PT and removing readout TFT, this circuit achieves a compact structure with 75‐μm pixel pitch and a high charge gain of 34.7, enabling it suitable for high‐resolution and low‐dose medical imaging.