MR scan selection for PET attenuation correction

A technology for attenuation correction, scanning data, applied in the direction of instruments for radiological diagnosis, computerized tomography scanners, applications, etc.

Active Publication Date: 2014-06-11
SIEMENS HEALTHCARE GMBH
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Problems solved by technology

This method is undesirably time-consuming and subjective

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  • MR scan selection for PET attenuation correction
  • MR scan selection for PET attenuation correction
  • MR scan selection for PET attenuation correction

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Embodiment Construction

[0017] Methods, computer program products, and systems for attenuation correction of PET scan data are described. For the purpose of attenuation correction (AC), multiple MR scan data sets were acquired during the duration of the PET acquisition. MR scan data sets may be acquired at intervals during the PET acquisition. Acquisition of MR-AC scan data sets may advantageously not involve as much time as full MR data acquisition (eg, diagnostic MR scans). Magnetic resonance AC (MR-AC) data is determined from multiple MR scan data sets based on detection of volume motion of the scan during PET acquisition. Motion is detected based on evaluation of scan data acquired during PET acquisition (eg, evaluation of spatial alignment). Knowing when motion occurred during the PET acquisition, MR-AC data can be selected or otherwise determined for alignment with the PET scan data. MR-AC data can thus be naturally aligned with PET scan data. Improved PET imaging can thus be provided while...

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Abstract

The invention relates to MR scan selection for PET attenuation correction. A method of attenuation correction for a positron emission tomography (PET) system (52) includes: obtaining PET scan data representative of a volume scanned by the PET system (52); obtaining a plurality of magnetic resonance (MR) scan data sets representative of the volume, each MR scan data set being acquired in a respective time period during acquisition of the PET scan data by the PET system; detecting motion of the volume that occurred during the acquisition of the PET scan data based on an assessment of the plurality of MR scan data sets, the PET scan data, or the plurality of MR scan data sets and the PET scan data; determining attenuation correction data from the plurality of MR scan data sets based on the detected motion for alignment of the attenuation correction data and the PET scan data; and correcting the PET scan data with the attenuation correction data.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application entitled "System for Processing Corresponding MR and PET Image Data," filed December 4, 2012 and assigned Serial No. 61 / 733,132, the entire disclosure of which is hereby incorporated by reference. technical field [0003] This embodiment relates to the integration of imaging systems, in particular magnetic resonance (MR) imaging and positron emission tomography (PET) systems. Background technique [0004] PET imaging yields quantitative measurements of metabolic and dynamic processes. PET imaging relies on the positron-emitting decay of radiotracer isotopes attached to biologically active compounds. The subsequent annihilation of the positron and electron generates pairs of high energy photons traveling in approximately opposite directions. These events are detected when photons reach the PET system's detectors. Unfortunately, photons can be absorbed ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03A61B5/055G06T5/00
CPCG06T7/0026G06T7/20G01R33/481G06T7/004A61B5/055G06T7/0012A61B6/037A61B5/0037A61B2576/00A61B5/0035G06T5/008G06T5/50G06T2207/10088G06T2207/10104A61B6/4417A61B6/5247A61B6/5258G16H30/40
Inventor C·格利尔米C·格佩尔特D·福尔M·芬彻尔
Owner SIEMENS HEALTHCARE GMBH
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