公开(公告)号：US12141898B2

公开(公告)日：2024-11-12

申请号：US18585354

申请日：2024-02-23

Applicant: Siemens Medical Solutions USA, Inc.

Inventor： Vladimir Panin ,  Mehmet Aykac ,  Shikui Yan ,  Brian Kelly

IPC: G06T11/00 ,  A61B6/03 ,  G16H30/40

Abstract: An improved method for time alignment (TA) procedure and crystal efficiency (CE) normalization estimation procedure for a PET scanner system is disclosed. In the TA procedure modeled time-of-flight (TOF) data are compared against the measured TOF data from an axially short cylinder phantom in order to find individual detector's time offsets (TOs). Then the TOs are estimated simultaneously by matching the TOF center of mass between the modeled and measured TOF data. In the CE estimation, TOF reconstruction of CBM data on the axially short cylinder phantom is performed. Alternating between TOF image reconstruction and CE updates eventually lead to the correct estimation of activity and CE component.

公开(公告)号：US11874411B2

公开(公告)日：2024-01-16

申请号：US16948554

申请日：2020-09-23

Applicant: Siemens Medical Solutions USA, Inc.

Inventor： Vladimir Panin ,  Deepak Bharkhada

IPC: A61B6/03 ,  G06N3/02 ,  G06F18/214 ,  G01T1/29 ,  G01T1/20 ,  G06T11/00

CPC classification number: G01T1/2985 ,  A61B6/032 ,  A61B6/037 ,  G01T1/2018 ,  G06F18/214 ,  G06N3/02 ,  G06T11/008

Abstract: Positron emission tomography (PET) with partially known attenuation accounts for the missing attenuation. Since a computed tomography (CT) scan may provide attenuation for less than all the locations used in PET reconstruction, artificial intelligence corrects for the missing attenuation. For example, the unknown attenuation or attenuation correction factors are estimated by the artificial intelligence. The known and estimated attenuations or correction factors are used in the PET reconstruction, providing more uniform PET sensitivity and better accounting for scatter. As another example, the artificial intelligence alters intensity of the activity in some locations to account for reconstruction with missing attenuation information, correcting for sensitivity variation and/or lack of scatter information for some locations.

公开(公告)号：US20220309718A1

公开(公告)日：2022-09-29

申请号：US17596829

申请日：2020-09-29

Applicant: Siemens Medical Solutions USA, Inc.

Inventor： Vladimir Panin ,  Mehmet Aykac ,  Shikui Yan ,  Brian Kelly

IPC: G06T11/00 ,  A61B6/03 ,  G16H30/40

Abstract: An improved method for time alignment (TA) procedure and crystal efficiency (CE) normalization estimation procedure for a PET scanner system is disclosed. In the TA procedure modeled time-of-flight (TOF) data are compared against the measured TOF data from an axially short cylinder phantom in order to find individual detector's time offsets (TOs). Then the TOs are estimated simultaneously by matching the TOF center of mass between the modeled and measured TOF data. In the CE estimation, TOF reconstruction of CBM data on the axially short cylinder phantom is performed. Alternating between TOF image reconstruction and CE updates eventually lead to the correct estimation of activity and CE component.

公开(公告)号：US20240273783A1

公开(公告)日：2024-08-15

申请号：US18585354

申请日：2024-02-23

Applicant: Siemens Medical Solutions USA, Inc.

Inventor： Vladimir Panin ,  Mehmet Aykac ,  Shikui Yan ,  Brian Kelly

IPC: G06T11/00 ,  A61B6/03 ,  G16H30/40

CPC classification number: G06T11/003 ,  A61B6/037 ,  G06T11/006 ,  G16H30/40

Abstract: An improved method for time alignment (TA) procedure and crystal efficiency (CE) normalization estimation procedure for a PET scanner system is disclosed. In the TA procedure modeled time-of-flight (TOF) data are compared against the measured TOF data from an axially short cylinder phantom in order to find individual detector's time offsets (TOs). Then the TOs are estimated simultaneously by matching the TOF center of mass between the modeled and measured TOF data. In the CE estimation, TOF reconstruction of CBM data on the axially short cylinder phantom is performed. Alternating between TOF image reconstruction and CE updates eventually lead to the correct estimation of activity and CE component.

公开(公告)号：US20230288508A1

公开(公告)日：2023-09-14

申请号：US18004186

申请日：2020-09-11

Applicant: Siemens Medical Solutions USA, Inc.

Inventor： Matthias J. Schmand ,  Paul Schleyer ,  James L. Corbeil ,  Vladimir Panin

IPC: G01R33/48 ,  A61B6/03 ,  A61B6/00 ,  G06T11/00

CPC classification number: G01R33/481 ,  A61B6/037 ,  A61B6/4266 ,  A61B6/4275 ,  G06T11/006 ,  G06T2211/424

Abstract: A PET system for a PET/MRI machine is disclosed. The PET system includes a PET detector assembly arranged to form a single gap aligned with the high-density support structure assembly and the shielded cable assembly that run along the patient bed in the PET/MRI machine. The PET detector arrangement maximizes the allowable diameter of the PET system within the MR magnet and ensures that the high-density material does not interfere with image acquisition. Further, various image reconstruction techniques compatible with the PET detector arrangement are described.

公开(公告)号：US11468607B2

公开(公告)日：2022-10-11

申请号：US16949640

申请日：2020-11-09

Applicant: Siemens Medical Solutions USA, Inc.

Inventor： Deepak Bharkhada ,  Chuanyu Zhou ,  Vladimir Panin ,  William Whiteley ,  Jicun Hu ,  Michael E. Casey

IPC: G06K9/00 ,  G06T11/00 ,  G06T7/20 ,  G06N3/08 ,  G06V10/82

Abstract: An image reconstruction system generates a motion estimation using images that have been reconstructed using AI processing. The system receives listmode data collected by an imaging system and produces two or more histo-images based on the listmode data. The system provides the two or more histo-images to an AI system and receives two or more AI reconstructed images back from the AI system based on the two or more histo-images. The system generates a motion estimation based on the two or more AI reconstructed images.

公开(公告)号：US20220148236A1

公开(公告)日：2022-05-12

申请号：US16949640

申请日：2020-11-09

Applicant: Siemens Medical Solutions USA, Inc.

Inventor： Deepak Bharkhada ,  Chuanyu Zhou ,  Vladimir Panin ,  William Whiteley ,  Jicun Hu ,  Michael E. Casey

IPC: G06T11/00 ,  G06T7/20 ,  G06N3/08

Abstract: An image reconstruction system generates a motion estimation using images that have been reconstructed using AI processing. The system receives listmode data collected by an imaging system and produces two or more histo-images based on the listmode data. The system provides the two or more histo-images to an AI system and receives two or more AI reconstructed images back from the AI system based on the two or more histo-images. The system generates a motion estimation based on the two or more AI reconstructed images.

公开(公告)号：US20220099770A1

公开(公告)日：2022-03-31

申请号：US17031974

申请日：2020-09-25

Applicant: Siemens Medical Solutions USA, Inc.

Inventor： Deepak Bharkhada ,  Vladimir Panin

IPC: G01R33/48 ,  G01R33/56 ,  A61B5/055 ,  A61B6/00 ,  G06T7/00

Abstract: Various systems and computer-implemented methods for Radio Frequency (RF) coil attenuation correction are disclosed. PET time-of-flight (TOF) data generated by a PET imaging modality collocated with an MR imaging modality is received. RF coil attenuation data is extracted from the PET TOF data and an initial RF coil attenuation map is generated. A trained model configured to improve a signal to noise ratio of the initial RF coil attenuation map is applied to generate a final RF coil attenuation map. Attenuation correction of the PET TOF data is performed based on the final RF coil attenuation map. An image is reconstructed from attenuation corrected PET TOF data.

公开(公告)号：US20210405226A1

公开(公告)日：2021-12-30

申请号：US17303236

申请日：2021-05-25

Applicant: Siemens Medical Solutions USA, Inc.

Inventor： Jicun Hu ,  Matthew Restivo ,  Inki Hong ,  Vladimir Panin ,  Frank Kehren ,  Michael E. Casey

IPC: G01T1/29 ,  G06T11/00 ,  A61B6/03

Abstract: Systems and methods to partially-gate PET data include acquisition of first data describing a plurality of coincidences detected during a scan of an object, each of the plurality of coincidences associated with a coincidence time and a line of response, acquisition of a motion signal associated with motion of the object during the scan, determination of lines of response which are associated with a region of the object, determination of time periods of region motion based on the motion signal, modification of the first data to remove coincidences which are associated with the determined lines of response and which are associated with a coincidence time during a time period of region motion, reconstruction of an image of the object based on the modified first data, and display of the image.

公开(公告)号：US20250012935A1

公开(公告)日：2025-01-09

申请号：US18886012

申请日：2024-09-16

Applicant: Siemens Medical Solutions USA, Inc.

Inventor： Jicun Hu ,  Matthew Restivo ,  Inki Hong ,  Vladimir Panin ,  Frank Kehren ,  Michael E. Casey

IPC: G01T1/29 ,  A61B6/00 ,  A61B6/03 ,  G06T11/00

Abstract: Systems and methods to partially-gate PET data include acquisition of first data describing a plurality of coincidences detected during a scan of an object, each of the plurality of coincidences associated with a coincidence time and a line of response, determination of lines of response which pass through a region of the object, determination of time periods of motion of the region, modification of the first data to remove coincidences which are associated with the determined lines of response and which are associated with coincidence time during the determined time periods of motion of the region, reconstruction of an image of the object based on the modified first data, and display of the image.