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公开(公告)号：US20240169609A1
公开(公告)日：2024-05-23
申请号：US18056305
申请日：2022-11-17
发明人： Arka Datta , Brian Nett , John M. Boudry
IPC分类号： G06T11/00
CPC分类号： G06T11/005 , G06T2210/41
摘要： Computer processing techniques are described for computed tomography (CT) value adjustment of CT images. According to an example, determining, by a system comprising a processor, an adjustment to a calibration vector used to reconstruct CT scan data into first CT image data, wherein determining the adjustment is based on difference between a current CT value of a region in the first CT image data and a target CT value for the region. The method further comprises modifying, by the system, the calibration vector based on the adjustment, resulting in a modified calibration vector, and reconstructing, by the system, the CT scan data into second CT image data using the modified calibration vector, resulting in the region in the second CT image data comprising the target CT value.
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2.发明公开公开(公告)号：US20230389884A1
公开(公告)日：2023-12-07
申请号：US17805834
申请日：2022-06-07
CPC分类号： A61B6/4241 , A61B6/032 , B23K26/21 , G01R31/52 , A61B6/4266 , A61B6/52
摘要： Methods and systems are provided for repairing a defective segment of a sensor array of a photon counting detector of a photon counting computed tomography (PCCT) imaging system. In one example, a method for a PCCT imaging system comprises dividing a segment of the sensor array into a plurality of sub-segments, wherein each sub-segment of the plurality of sub-segments is electrically coupled to a readout electronics, the readout electronics configured to calculate a photon count for the segment; generating a total photon count for the divided segment based on combined electrical signals produced at each sub-segment of the divided segment; and reconstructing an image based on the total photon count at the divided segment. A defect detected in the divided segment may be traced to a defective sub-segment, which may be isolated from the readout electronics, thereby increasing a quality of the reconstructed image.
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公开(公告)号：US20230320688A1
公开(公告)日：2023-10-12
申请号：US17658900
申请日：2022-04-12
发明人： Arka Datta , John M. Boudry , Zhoubo Li , Adam Cohen
CPC分类号： A61B6/583 , A61B6/032 , G06T7/0002 , G06T2207/30168 , G06T2207/30004 , G06T2207/10081
摘要： Methods and systems are provided for calibrating a medical imaging system. In one example, a method includes identifying a calibration vector to be updated based on an artifact in an image acquired with the medical imaging system, determining calibration data to be obtained with the medical imaging system based on the calibration vector, obtaining the calibration data with the medical imaging system, and updating the calibration vector based on the calibration data.
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公开(公告)号：US20230229925A1
公开(公告)日：2023-07-20
申请号：US17648390
申请日：2022-01-19
发明人： Arka Datta , John M. Boudry
IPC分类号： G06N3/08
CPC分类号： G06N3/084
摘要： Systems/techniques that facilitate thermally adaptive scan sequencing for computed tomography scanners are provided. In various embodiments, a system can access a set of scanning protocols performable by a computed tomography scanner. In various aspects, the system can further access a current thermal state of the computed tomography scanner. In various instances, the system can identify, in the set of scanning protocols and based on the current thermal state, a scanning protocol that is predicted to reduce or control thermal stresses experienced by the computed tomography scanner. In various cases, the system can cause the computed tomography scanner to perform the identified scanning protocol.
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