7 results about "Nuclear imaging" patented technology

This invention discloses a neutron-gamma dual-mode synchronous imaging method and system based on single-pixel detection, belonging to the field of nuclear imaging technology. The method includes: irradiating the sample under test with modulated neutron beams of different encoding modes, identifying the neutron event count and gamma-ray energy spectrum for each irradiation; dividing the sample under test into several pixel units, reconstructing a neutron transmission structure image based on the neutron event count for each irradiation; obtaining the detection efficiency of the characteristic gamma rays received by each pixel unit of the sample under test, and constructing a gamma response modulation matrix in combination with the neutron transmission structure image; extracting the net count of the characteristic peaks of the target element from the gamma-ray energy spectrum, reconstructing an element distribution image in combination with the gamma response modulation matrix, and fusing it with the neutron transmission structure image for output. This invention achieves synchronous acquisition of structural and elemental information, automatic spatial registration, and joint high-precision reconstruction, and is particularly suitable for the engineering application of miniaturized neutron sources.

For dosimetry, a miniaturized nuclear imaging system with a solid-state detector is used to determine the activity and / or injected dose of radiopharmaceuticals. By being sized to scan a syringe or vial, the solid-state detector can be used to determine the injected dose with higher accuracy than current dose calibrators and with less frequent use of calibration or normalization sources. The miniaturized nuclear imaging system reconstructs activity in the same way as a nuclear imaging system that scans patients, and therefore can be used to calibrate a dose model. A tissue mimicking phantom with a solid-state dosimeter measures the dose from a radiopharmaceutical that is used to calibrate the dose model.

The present disclosure relates to the field of nuclear imaging and therapy, and more specifically to high purity copper radiotracer compositions useful in imaging, such as positron emission tomography (PET) and single-photon emission computerized tomography (SPECT), and therapy. More specifically, the present disclosure relates to novel compositions useful in imaging and treatment of conditions such as prostate cancer, somatostatin receptor-expressing tumors, like neuroendocrine tumor, epithelial tumors, as well as to methods wherein such compositions are prepared.

This application relates to a method, apparatus, and magnetic resonance imaging system for optimizing multinucleus imaging sequences. The optimization method includes: acquiring the multinucleus imaging sequence to be optimized and determining a target coding axis and non-target coding axes; on the target coding axis, for each nuclide, determining the secondary coding scheme of the nuclide's basic coding sequence, and determining candidate coding sequences for the nuclide based on the basic coding sequence and secondary coding scheme; determining the maximum gradient duration sum for a single scan based on the candidate coding sequences of each nuclide on the target coding axis and the fixed coding sequences of each nuclide on the non-target coding axes; and optimizing the candidate coding sequences of each nuclide on the target coding axis with minimizing the maximum gradient duration sum as the optimization objective to obtain the target coding sequence. This application solves the problems of low signal-to-noise ratio and slow multinucleus imaging speed associated with existing multinucleus imaging sequences.

A computer-implemented method for determining scan parameters includes receiving a set of input parameters. An average per piece of a nuclear imaging scanner having a predetermined field of view (FOV) is determined based on the input parameters, and at least one scan parameter is determined based on the average per piece of the nuclear imaging scanner.

The present disclosure relates to the field of nuclear imaging and therapy, and more specifically to high purity copper radiotracer compositions useful in imaging, such as positron emission tomography (PET) and single-photon emission computerized tomography (SPECT), and therapy. More specifically, the present disclosure relates to novel compositions useful in imaging and treatment of conditions such as prostate cancer, somatostatin receptor-expressing tumors, like neuroendocrine tumor, epithelial tumors, as well as to methods wherein such compositions are prepared.