Abstract:
The invention relates to a general composite compartmental model and a compartmental analysis procedure to extract non-invasively the concentration (C p ) of the imaging agent in plasma (301), in metabolites (304, 504) and in blood elements (303) (like red cells, platelets, plasma protein etc.) from time signal curves measured within a reference tissue region (200). This is made possible by deploying an injection function (S INJ (t)) as input which models the amount of imaging agent administered to the patient as a function of time. The invention allows the presentation of the plasma input function to the medical practitioner without the need for invasively drawing blood samples.
Abstract:
A multiband microwave antenna (1) is described, which antenna is intended particularly for surface mounting (SMD) on a printed circuit board (PCB) and has a substrate (10) having at least a first and a second metallization structure (11, 12), wherein the first metallization structure (11) has at least a metal area (111) forming a resonator area and the second metallization structure (12) has at least a resonant printed conductor structure (121), thus enabling the antenna to combine the advantageous properties of a PIFA (planar inverted F-antenna) with those of a PWA (printed wire antenna).
Abstract:
A method includes obtaining a first image of first contrast agent uptake in non tissue of interest of a patient. The first image is generated based on data from first data from a first imaging modality. The method further includes obtaining a second image of second contrast agent uptake in tissue of interest and the non tissue of interest of the patient. The second image is generated based on second data from a second different imaging modality. The method further includes generating a first image mask based on the first image and generating a first feature image based on the second image and the first image mask. The method further includes displaying at least the first feature image.
Abstract:
The invention relates to a general composite compartmental model and a compartmental analysis procedure to extract non-invasively the concentration (C p ) of the imaging agent in plasma (301), in metabolites (304, 504) and in blood elements (303) (like red cells, platelets, plasma protein etc.) from time signal curves measured within a reference tissue region (200). This is made possible by deploying an injection function (S INJ (t)) as input which models the amount of imaging agent administered to the patient as a function of time. The invention allows the presentation of the plasma input function to the medical practitioner without the need for invasively drawing blood samples.
Abstract:
The invention relates to the estimation of kinetic parameters for a target region (210) utilizing information from a normal (unperturbed) reference region (200). The proposed compartmental model models metabolic pathways for blood, reference and target tissue. The proposed analysis procedure features two alternatives: (A) Extraction of the plasma input in the reference region (200) and its unperturbed kinetic parameters, hereafter utilization of the plasma input and the kinetic parameters of the reference region as initial parameters for the analysis of the target region (210). (B) The system of kinetic equations describing the kinetics of the imaging agent in the target and reference regions is solved for the input function (amount of free imaging agent in the plasma or the total imaging agent SB(t) contained in plasma, blood elements and metabolites) considered to be the same for both regions.
Abstract:
A multiband microwave antenna (1) is described, which antenna is intended particularly for surface mounting (SMD) on a printed circuit board (PCB) and has a substrate (10) having at least a first and a second metallization structure (11, 12), wherein the first metallization structure (11) has at least a metal area (111) forming a resonator area and the second metallization structure (12) has at least a resonant printed conductor structure (121), thus enabling the antenna to combine the advantageous properties of a PIFA (planar inverted F-antenna) with those of a PWA (printed wire antenna).
Abstract:
Magnetic resonance (MR) imaging typically has excellent spatial resolution, but relatively poor temporal resolution. In contrast, positron emission tomography (PET) typically has excellent temporal resolution, but poor spatial resolution relative to MR. Resultantly, it is advantageous to use combined PET-MR imaging sequences to create hybrid or enhanced images that reap the benefits of both modalities. A contrast agent (80) that includes both a PET tracer (82) and MR contrast enhancement (86) can be used in such a combined modality setting. The contrast agent (80) also includes a targeting system (84) that allows the contrast agent (80) to pool in a region of interest.
Abstract:
The invention relates to a data processing system (1) for the evaluation of image data, particularly of PET-images (I), that represent the time varying concentration of a tracer substance like F-MISO in an object (20). The data processing system (1) comprises a library module (48) with analytical solutions (C j (t)) for several compartment models. Preferably the library also contains the analytical gradients with respect to the parameters of interest. From the library an appropriate solution for each study can be chosen by a user. The use of analytical functions together with the information about the error (s A ( t )) of the input data (either via noise models 43 or via a simulation 44) allows to extract all parameters mandatory to fully understand the kinetics of complex models (more than one tissue compartment) on a per-voxel basis in a robust way in real-time.
Abstract:
The invention relates to the estimation of kinetic parameters for a target region (210) utilizing information from a normal (unperturbed) reference region (200). The proposed compartmental model models metabolic pathways for blood, reference and target tissue. The proposed analysis procedure features two alternatives: (A) Extraction of the plasma input in the reference region (200) and its unperturbed kinetic parameters, hereafter utilization of the plasma input and the kinetic parameters of the reference region as initial parameters for the analysis of the target region (210). (B) The system of kinetic equations describing the kinetics of the imaging agent in the target and reference regions is solved for the input function (amount of free imaging agent in the plasma or the total imaging agent S B (t) contained in plasma, blood elements and metabolites) considered to be the same for both regions.
Abstract:
The invention relates to a data processing system (1) for the evaluation of image data, particularly of PET-images (I), that represent the time varying concentration of a tracer substance like F-MISO in an object (20). The data processing system (1) comprises a library module (48) with analytical solutions (C,(t)) for several compartment models. Preferably the library also contains the analytical gradients with respect to the parameters of interest. From the library an appropriate solution for each study can be chosen by a user. The use of analytical functions together with the information about the error (6 A ( t )) of the input data (either via noise models 43 or via a simulation 44) allows to extract all parameters mandatory to fully understand the kinetics of complex models (more than one tissue compartment) on a per-voxel basis in a robust way in real-time.