Flat panel X-ray detector for computed tomography

A computed tomography (CT) imaging system, comprising:

• a radiation source configured to emit an X-ray beam;
• and
• a flat panel X-ray detector, comprising:
• a scintillator layer configured to convert X-ray photons into lower energy light photons;
• a light imager layer configured to convert the light photons into electrons, wherein the light imager layer comprises a light imager panel comprising an array of photodiodes having a first side that faces the scintillator layer and a second side opposite the first side;
• and
• a plurality of readout devices that converts the electrons into digitized pixel values, wherein each photodiode of the array of photodiodes is coupled to a respective dedicated readout channel of a respective readout device of the plurality of readout devices via a respective dedicated data line, and the plurality of readout devices are configured to continuously directly readout the electrons from the array of photodiodes, wherein each respective dedicated data line comprises a trace, and one or more traces are located underneath one or more photodiodes on the second side of the array of photodiodes, wherein each readout device of the plurality of readout devices is configured to utilize different readout modes to readout the electrons from the array of photodiodes, wherein the array of photodiodes is divided between a pair of standard resolution zones flanking a high-resolution center zone, and wherein the different readout modes comprise a first readout mode where the pair of standard resolution zones and the high-resolution center zone are readout at a same resolution and a second readout mode wherein the high-resolution center zone is readout at higher resolution than in the first readout mode.

A flat panel X-ray detector for a computed tomography (CT) imaging system, comprising:

• a scintillator layer configured to convert X-ray photons into lower energy light photons;
• a light imager layer configured to convert the light photons into electrons, wherein the light imager layer comprises a light imager panel comprising an array of photodiodes having a first side that faces the scintillator layer and a second side opposite the first side, and the light imager panel lacks both transistors and scan line;
• and
• a readout device that converts the electrons into digitized pixel values, wherein each photodiode of the array of photodiodes is coupled to a respective dedicated readout channel of the readout device via a respective dedicated data line, and the readout device is configured to continuously directly readout the electrons from the array of photodiodes;
• and
• wherein each photodiode of the array of photodiodes comprises amorphous silicon and is configured to act as a direct current source to the readout device, and wherein each respective dedicated data line comprises a trace, and one or more traces are located underneath a gap in the scintillator layer and one or more traces are located underneath one or more photodiodes on the second side of the array of photodiodes;
• and
• wherein the readout device is configured to utilize different readout modes to readout the electrons from the array of photodiodes, wherein the array of photodiodes is divided between a pair of standard resolution zones flanking a high-resolution center zone, and wherein the different readout modes comprise a first readout mode where the pair of standard resolution zones and the high-resolution center zone are readout at a same resolution and a second readout mode wherein the high-resolution center zone is readout at higher resolution than in the first readout mode.