182 results about "Nuclear imaging" patented technology

A gamma camera having a scintillation detector formed of multiple bar detector modules. The bar detector modules in turn are formed of multiple scintillation crystal bars, each being designed to have physical characteristics, such as light yield, to achieve a sufficient spatial resolution for nuclear medical imaging applications. According to another aspect of the invention, the bar detector modules are arranged in a three-dimensional array, where each module is made up of a two-dimensional array of bar detectors with at least one photosensor optically coupled to each end of the module. Such a camera can be used for both PET (coincidence) and single photon imaging applications. According to another aspect of the invention, a bar detector gamma camera is provided, which utilizes an improved positioning algorithm that greatly enhances spatial resolution in the z-axis direction (i.e., the direction along the length of the scintillation crystal bar).

A system and method are provided for intravascular nuclear imaging, which is furthermore designed to locate the plaque along the artery and to estimate its thickness. Radiolabeled antibodies directed specific antigens in the atherosclerotic plaque or radiolabeled immunoscintigraphy pharmaceutical, which binds apoptotic cells, have been proposed for detection of vulnerable plaque. Other Radiopharmaceuticals such as Gallium Citrate, radio labeled white blood cells etc. call also be used to illuminate inflammatory processes.

Systems, methods, and probes are provided for functional imaging by radioactive-emission-measurements, specific to body structures, such as the prostate, the esophagus, the cervix, the uterus, the ovaries, the heart, the breast, the brain, and the whole body, and other body structures. The nuclear imaging may be performed alone, or together with structural imaging, for example, by x-rays, ultrasound, or MRI. Preferably, the radioactive-emission-measuring probes include detectors, which are adapted for individual motions with respect to the probe housings, to generate views from different orientations and to change their view orientations. These motions are optimized with respect to functional information gained about the body structure, by identifying preferred sets of views for measurements, based on models of the body structures and information theoretic measures. A second iteration, for identifying preferred sets of views for measurements of a portion of a body structure, based on models of a location of a pathology that has been identified, makes it possible, in effect, to zoom in on a suspected pathology. The systems are preprogrammed to provide these motions automatically.

A method of producing a nuclear medicine image of a subject comprising the steps of acquiring nuclear image data suitable to produce a nuclear tomographic image, the data being acquired by at least one gamma camera head (12, 14) rotating about the subject at an average first rate, acquiring x-ray imaging data suitable to produce an x-ray tomographic image for attenuation correction of the gamma camera image, the data being acquired by an array of detectors (20) irradiated by an x-ray source (18) rotating around the subject at an average second rate which is within a factor of 10 of the first rate, and reconstructing an attenuation corrected nuclear medicine image utilizing the nuclear imaging data and x-ray imaging data.

Automated spine localizing, numbering and autoprescription system enhances correct location of diseased or injured tissue, even allow multi-spectral diagnosis. Externally located this tissue is facilitated by an integrated self adhesive spatial reference and skin marking system that is designed for a variety of modalities to include MRI, CT, SPECT, PET, planar nuclear imaging, radiography, XRT, thermography, optical imaging and 3D space tracking. The device ranges from a point localizer to a more multifunctional and complex grid / phantom system. The specially designed spatial reference(s) is affixed to an adhesive strip with corresponding markings so that after applying the unit to the skin / surface and imaging, the reference can be removed leaving the skin appropriately marked. The localizer itself can also directly adhere to the skin after being detached from the underlying strip. A spine autoprescription process performs image analysis that is able to identify vertebrae and discs even in the presence of abnormalities.

The present invention pertains to a remote center of motion robot for medical image scanning and image-guided targeting, hereinafter referred to as the “Euler” robot. The Euler robot allows for ultrasound scanning for 3-Dimensional (3-D) image reconstruction and enables a variety of robot-assisted image-guided procedures, such as needle biopsy, percutaneous therapy delivery, image-guided navigation, and facilitates image-fusion with other imaging modalities. The Euler robot can also be used with other handheld medical imaging probes, such as gamma cameras for nuclear imaging, or for targeted delivery of therapy such as high-intensity focused ultrasound (HIFU). 3-D ultrasound probes may also be used with the Euler robot to provide automated image-based targeting for biopsy or therapy delivery. In addition, the Euler robot enables the application of special motion-based imaging modalities, such as ultrasound elastography.

An multi-modality imaging system for imaging of an object under study that includes a magnetic resonance imaging (MRI) apparatus and an MRI-compatible single-photon nuclear imaging apparatus imbedded within the RF coil of the MRI system such that sequential or simultaneous imaging can be done with the two modalities using the same support bed of the object under study during the imaging session.

An improved method of, and apparatus for, nuclear imaging takes advantage of the ability to determine the depth of gamma ray / electron interaction within a semiconducting gamma ray detector to determine the (most highly probable) location of the first gamma ray / electron interaction within the detector. Lines of interaction constructed between opposing detector arrays, extending between the location of the first gamma ray / electron interaction in each detector associated with the coincident detection of gamma radiation, permits a positron-emitting object of interest to be imaged according to protocols known in the art, but with better spatial resolution than previously believed to have been known.

Labeled antibodies, antibody fragments or peptides binding to soluble cytokines or cytokine receptors are used to diagnose whether a patient has cancer or an autoimmune disease. In a preferred embodiment, a radiolabelled tag that is chemically bound to a peptide, antibody, or antibody fragment specific for sTNFR-1 and / or sTNFR2 is injected into a patient with a tumor, or suspected tumor, or with any disease associated with STNF-1 / STNF-2. The patient is then imaged using standard nuclear imaging equipment to detect areas or sites of concentration of the radiolabel and / or receptor / inhibitor and / or antigen. By screening for cancer by the substances it produces, using an injected antibody to that substance with a tracer attached to it, one can detect cancer at a very early stage, potentially even microscopically.

The invention relates to the medical slice imaging and nuclear-imaging field, in particular to a first-group board card, a signal buffering unit, a second-group receiving board card, a data buffering unit, a reference clock 17, a clock adjusting unit and an on-site programmable gate array that are used for a conforming system in a positron slice scanning device; the method is characterized in that the on-site programmable gate array is utilized to judge the time, the position and the energy among all matters, and two matters that pass through the judging and selecting regulations form a conforming case. By inducting the on-site programmable gate array, the case information captured by a front-end detector module of a PET apparatus can be processed fast and high-efficiently by compiling hardware description language, so as to ensure whether the conforming matters happen or not. The method is an improvement of the process of the prior PET conforming system. The method can finish the process of the conforming system high-efficiently and fast by using a piece of FPGA and can lead the system not to be inducted into the dead time while the high system sensitivity is obtained.

Nuclear imaging systems, non-transitory computer readable media and methods for adaptive imaging are presented. Particularly, the present method includes acquiring preliminary projection data by scanning each of one or more views of a subject for a determined preliminary scan interval. Further, a region of interest of the subject is identified. The preliminary projection data is then used to perform a constrained optimization of a rapidly computable image quality metric for determining an acquisition protocol that improves the image quality metric at the identified region of interest. Particularly, the determined acquisition protocol is used to acquire target projection data corresponding to at least the identified region of interest. Further, an image of at least the identified region of interest is reconstructed using the target projection data, the preliminary projection data, or a combination thereof.

Apparatus for use in a magnetic resonance imaging system, the imaging system generating a magnetic imaging field in an imaging region (5), the apparatus including at least one coil for at least one of transmitting, receiving or transceiving an electromagnetic field, a field component (4) (such as a coil or a shield) and a drive (6) coupled to the field component for moving the field component (4) relative to the imaging region (5) to thereby modify the electromagnetic field during imaging process. The same concept can also be applied to nuclear imaging or nuclear spectroscopy apparatus.

Assembly comprising a gas-filled microvesicle and a structural entity which is capable to associate through an electrostatic interaction to the outer surface of said microvesicle (microvesicle associated component—MAC), thereby modifying the physico-chemical properties thereof. Said MAC may optionally comprise a targeting ligand, a bioactive agent, a diagnostic agent or any combination thereof. The assembly of the invention can be formed from gasfilled microbubbles or microballoons and a MAC having a diameter of less than 100 pm, in particular a micelle and is used as an active component in diagnostically and / or therapeutically active formulations, in particular for enhancing the imaging in the field of ultrasound contrast imaging, including targeted ultrasound imaging, ultrasound-mediated drug delivery and other imaging techniques such as molecular resonance imaging (MRI) or nuclear imaging.

A high-resolution nuclear imaging detector for use in systems such as positron emission tomography includes a monolithic scintillator crystal block in combination with a single photomultiplier tube read-out channel for timing and total energy signals, and one or more solid-state photosensor pixels arrays on one or more vertical surfaces of the scintillator block to determine event position information.

A collimator device for a nuclear imaging camera has a grid of collimation square holes formed by a plurality of elongated, metal sheets arranged in a grid pattern, and pixellated scintillators individually located in each of the collimation square holes. Each of the metal sheets has evenly spaced slots into which other sheets are inserted. At least a portion of the surfaces of the sheets forming the grid of the collimation square holes is coated with an optically reflecting material coating.

Nuclear imaging systems, non-transitory computer readable media and methods for tomographic imaging are presented. Projection data is acquired by scanning one or more views of a subject for a designated scan interval less than a total scan interval. A first image of a target region of interest (ROI) is reconstructed using projection data acquired over a first fraction of the designated scan interval. A second target ROI image is reconstructed using at least a subset of projection data acquired over the first and / or a second fraction. A change in an image quality characteristic over the first and the second fractions is determined by determining one or more differences between the first and the second images. A value of an imaging parameter is estimated based on the change to acquire projection data for generating a target ROI image having at least a predetermined level of the image quality characteristic.

Novel methods of synthesis of chelator-targeting ligand conjugates, compositions comprising such conjugates, and therapeutic and diagnostic applications of such conjugates are disclosed. The compositions include chelator-targeting ligand conjugates optionally chelated to one or more metal ions. Methods of synthesizing these compositions in high purity are also presented. Also disclosed are methods of imaging, treating and diagnosing disease in a subject using these novel compositions, such as methods of imaging a tumor within a subject and methods of diagnosing myocardial ischemia.

A method, process and apparatus for compensating for changes to the gain of photo detectors in a nuclear imaging apparatus is disclosed. Specifically, embodiments detect positron annihilation event pulses using photo detectors. Changes to the gain of the photo detectors are compensated for by determining the relationship of a detected event pulse peak with a target event pulse peak. Based on the difference between these two peaks, a corrected gain is determined in a closed-loop control system. The corrected gain can be used to compensate for temperature changes that can affect the gain of the photo detectors.

The present invention relates to novel cyclic peptides that may be conjugated with imaging agents, including novel imaging agents. Specifically, it includes c(KRGDf) NIR imaging compositions and novel cyclic HWGFTL polypeptides which may be used inter alia in NIR, MRI and nuclear imaging as well as therapy. Additionally, the invention includes novel imaging agents, such as TS-ICG derivatives. The invention also relates to methods of making and using such compounds. Such uses include both pre-operative and intraoperative detection of tumor cells and treatment monitoring.

A preclinical nuclear imaging detector system, including a gantry and one or more detector assemblies, each including a scintillator configured to interact with radiation emanating from a target test object being imaged and at least one pinhole collimator, having one or more pinhole apertures formed therein. The pinhole collimator is disposed between the target object and the scintillator, wherein a distance between the pinhole aperture and the scintillator is selected as a function of the number of pinhole apertures provided in the collimator and to optimize one of sensitivity or spatial resolution, such that the one or more pinhole apertures collectively project a unitary minified radiation image of the target object onto the scintillator. Further, one or more photosensors are optically coupled to the scintillator to receive interaction events from the scintillator.

A phantom and method are provided for co-registering a magnetic resonance image and a nuclear medical image. The phantom includes a first housing defining a first chamber configured to receive a magnetic resonance material upon which magnetic resonance imaging can be performed in order to produce the magnetic resonance image. The phantom also includes three or more second housings configured to be attached to the first housing, where the second housings each define a second chamber configured to receive a radioactive material upon which nuclear imaging can be performed in order to produce the nuclear medical image and upon which the magnetic imaging can be performed in order to produce the magnetic resonance image. The first chamber has a volumetric capacity that is larger than a volumetric capacity of each second chamber.

Systems, methods, and probes are provided for functional imaging by radioactive-emission-measurements, specific to body structures, such as the prostate, the esophagus, the cervix, the uterus, the ovaries, the heart, the breast, the brain, and the whole body, and other body structures. The nuclear imaging may be performed alone, or together with structural imaging, for example, by x-rays, ultrasound, or MRI. Preferably, the radioactive-emission-measuring probes include detectors, which are adapted for individual motions with respect to the probe housings, to generate views from different orientations and to change their view orientations. These motions are optimized with respect to functional information gained about the body structure, by identifying preferred sets of views for measurements, based on models of the body structures and information theoretic measures. A second iteration, for identifying preferred sets of views for measurements of a portion of a body structure, based on models of a location of a pathology that has been identified, makes it possible, in effect, to zoom in on a suspected pathology. The systems are preprogrammed to provide these motions automatically.

Apparatus for use in a magnetic resonance imaging system, the imaging system generating a magnetic imaging field in an imaging region (5), the apparatus including at least one coil for at least one of transmitting, receiving or transceiving an electromagnetic field, a field component (4) (such as a coil or a shield) and a drive (6) coupled to the field component for moving the field component (4) relative to the imaging region (5) to thereby modify the electromagnetic field during imaging process. The same concept can also be applied to nuclear imaging or nuclear spectroscopy apparatus.

Methods and systems for improving image quality of single photon nuclear imaging systems, such as single photon emission computed tomography (SPECT) systems for imaging of an object under study, such as small objects including small animals of different sizes using synthetic apertures. The methods and systems include processes and instrumentations for high-resolution, high detection efficiency leading to lower image noise and artifact-free synthetic aperture single photon nuclear images, such as SPECT images. Also, the method and systems provide design parameters, hardware settings, and data acquisition processes for optimal imaging of objects having different sizes.

A method and system for automatically identifying and tracking a ROI over all planar acquisition view angles of a nuclear imaging system, such as a gamma camera used for SPECT or planar imaging. Temporal intensity variation in emission projection imaging is measured to identify a region of interest (ROI) such as the myocardium. The method automatically tracks the location of the ROI over different planar view angles and adapts detector head orbit and positioning to bring the ROI within a predefined preferred area or so-called “sweet spot” within the FOV of a collimator attached to the front of a scintillation detector surface. After initial positioning of the detector head by the user, the system automatically tracks the ROI location as the detector head(s) rotate about the patient and re-position the detector head(s) appropriately to maintain the ROI within the optimal collimation area of the detector FOV.

A gamma camera having a scintillation detector formed of multiple rotating bar detector modules arranged in a ring configuration, with synchronized spin motion of each module. Such a camera can be used for both PET (coincidence) and single photon imaging applications. Image reconstruction is obtained using either an inverse 3-D Radon transform or a 3-D fan-beam algorithm.

A radiation therapy planning and follow-up system(10) includes an MR scanner (12) with a first bore (16) which defines an MR imaging region (18)and a functional scanner (26), e.g., a nuclear imaging scanner, or a CT scanner with a second bore (30) which defines a nuclear or CT imaging region (36). The first and second bores (16,30) have a diameter of at least 70cm, and preferably 80-85 cm. A radiation therapy type couch (90) moves linearly through the MR imaging region (18) along an MR longitudinal axis and the nuclear or CT imaging region (36) along a nuclear or CT longitudinal axis which is aligned with the MR longitudinal axis. The couch positions a subject sequentially in the MR and nuclear or CT imaging regions (18, 36). A fusion processor combines an image representation generated from data collection in the MR imaging region (18) and an image representation generated from data collection in the nuclear or CT imaging region (36) into a composite image representation and a planning processor (112) generates a radiation therapy treatment plan according to the composite image.

A multiple modality imaging system (10) includes a MR scanner (12) which defines an MR imaging region (18), a nuclear imaging scanner (26) which defines a nuclear imaging region (34), an CT scanner (36) which defines an CT imaging region (42). Each scanner (12, 26, 36) having a longitudinal axis along which a common patient support (46) moves linearly through the MR, nuclear, and CT imaging regions (18, 34, 42). A marker (130, 140, 150), for use with the system (10), includes a radio-isotope marker (132) which is imageable by the nuclear imaging scanner (26) and the CT scanner (36) surrounded by a flexible silicone MR marker (134) which is imageable by the MR scanner (12) and the CT scanner (36). A calibration phantom(162), for use with the image scanner (10), includes a plurality of the markers (130, 140, 150) supported by a common frame having a known and predictable geometry.

Systems and methods of generating timing triggers to determine timing resolutions of gamma events for nuclear imaging includes receiving a pulse signature representing a succession of triggers associated with a photomultiplier. When a number of triggers occurring within a predetermined time interval matches a predetermined number, an event trigger can be initiated. A delayed version of the pulse signature can be generated and compared to a predetermined timing trigger level. When the delayed version matches the predetermined timing trigger level, a timing trigger can be generated. Based on the timing trigger level, the timing trigger can be generated at the pulse of the delayed version that corresponds to the first photoelectron of a gamma event. The timing trigger can correspond to a timestamp for the first photoelectron so that a data acquisition system can identify the pulse from which to acquire energy information to generate a nuclear image.