56 results about "Gamma imaging" patented technology

Biopsy devices and methods useful with Positron Emission Tomography (PET) and Breast Specific Gamma Imaging (BSGI) are disclosed. A biopsy device including a flexible tube having a side aperture, and a PET or BSGI imageable material disposed within the flexible tube is disclosed. A biopsy method is disclosed that includes advancing a flexible tube having a PET or BSGI imageable material distally through the biopsy device. Various other embodiments and applications are disclosed.

Biopsy devices and methods useful with Positron Emission Tomography (PET) and Breast Specific Gamma Imaging (BSGI) are disclosed. A biopsy device including a flexible tube having a side aperture, and a PET or BSGI imageable material disposed within the flexible tube is disclosed. A biopsy method is disclosed that includes advancing a flexible tube having a PET or BSGI imageable material distally through the biopsy device. Various other embodiments and applications are disclosed.

An apparatus for imaging a field of view, according to an embodiment of the present invention, comprises an x-ray source positioned adjacent to the field of view, a source mask located between the x-ray source and the field of view having at least one source aperture defined therethrough, and an emission detector, such as a gamma camera, adjacent to the field of view. The apparatus may allow substantially concurrent x-ray imaging and gamma imaging of the field of view.

The invention discloses a gamma camera which comprises a first gamma imaging unit and a second gamma imaging unit, wherein the first gamma imaging unit comprises a first coding plate provided with a first pattern formed by a plurality of coding elements and a first detector for detecting a radiation ray penetrating through the first coding plate; the second gamma imaging unit comprises a second coding plate provided with a second pattern formed by a plurality of coding elements and a second detector for detecting the radiation ray penetrating through the second coding plate; and the first pattern and the second pattern form opposite patterns. In addition, the invention also discloses a method for detecting the radiation ray by utilizing the gamma camera. As the two coding plates and the two detectors are used in the gamma camera, two groups of projection data under opposite and reverse modes can be simultaneously acquired and simultaneously transmitted to a data processing unit for image reconstruction to realize real-time imaging, so that the coding and imaging speed under a patrol inspection mode is improved, and the purpose of quickly positioning a radiation source is achieved.

This invention presents a new device to produce images of the gamma field, specially designed for circumstances requiring high efficiency and fast response imaging, by applying the concept of image extraction within a given field of view, through the combination of efficient gamma radiation detectors. Each detector is located inside a shielding, with an area of the detector with no shielding to enter the incident gamma radiation detector with a plurality of angles in relation to the normal outgoing central axis to the surface of the detector through the unshielded area, where that central axis is divergent in relation to the outgoing central axes of neighboring detectors.

The present invention discloses a multiple-nuclide gamma imaging system and method and belongs to the field of medical imaging. The multiple-nuclide gamma imaging system comprises a multiple-nuclide tracer injection module, a multi-nuclide scintillation crystal detector module, a configurable circuit module and an image reconstruction and imaging module. The multiple-nuclide gamma imaging method comprises the following steps: S1, starting the imaging system, setting acquisition time of the imaging system, and injecting 11C, 13N, 15O and 18F labeled compounds into an imaging object; S2, obtaining a decay event emission gamma pulse data set by positioning a gamma detector; S3, outputting an electrical signal (scintillation pulse) by a silicon photomultiplier; S4, conducting time discrimination, energy discrimination, data acquisition and coincidence processing by a detector; and S5, displaying images in a tomographic manner by a computer. The disclosed multiple-nuclide gamma imaging system and method can obtain more comprehensive data than the prior art, comprehensively analyze multi-molecule events and related influences, reduce requirements on the total gamma photon counting, reduce irradiation risks on organisms and improve a signal-to-noise ratio of reconstructed images.

Radiation therapy of a lesion within a patient is guided to take into account movement of the lesion caused by respiration and / or cardiac effects by using MRI or other imaging system suitable for locating the lesion to image the patient while on the treatment support and using a gamma imaging system responsive to a radiation source preferentially taken up by the lesion and registered with the MRI so as to monitor movement of the lesion in real time and thus guide the beam of the RT.

The invention provides a directional gamma logging-while-drilling tool. A surface information processing system comprises a signal demodulation surface processing box, a well depth tracking measurer, surface information processing software and special graphics drawing software. A MWD (measurement while drilling) system comprises a mud signal pulser, a drive device, an inclinometry sub and an inclinometry battery tube. A directional gamma measurement system mainly comprises a special gamma battery tube and a directional gamma measurement sub. The directional gamma logging-while-drilling tool has the advantages that conventional wired measurement-while-drilling technical services can be performed; the tool with a gamma imaging function is capable of recognizing stratum information change, especially interfaces of stratums; the unit measurement sub can be hooked randomly according to function requirements; the directional gamma measurement function in high-speed rotation can be implemented; and the tool has a unique mechanical damping design.

A gamma imaging device including a gamma camera capturing a gamma radiation image, referred to as a gamma image, of an observed scene, and including a front face and having an axis of sight, and an auxiliary camera capturing a visible light image of the observed scene. The auxiliary camera is situated upstream from the front face of the gamma camera and has an optical axis substantially merged with the axis of sight of the gamma camera such that the visible light image and the gamma image are captured substantially simultaneously with the same direction of sight.

The present invention provides a method for identifying a 3-D event location of a gamma interaction for enhancing the precision of event location determination and improving the practicability of an edge-on ends-read imaging detector. The method establishes two expected photopeak relations and a mapping table for every unit in the sensor array before imaging. In real practice, two sensing values with respect to the energy of scintillation photons generated during the detection on an event are obtained by the edge-on ends-read imaging detector. Furthermore, two energy windows corresponding to each sensing value are determined according to the corresponding expected photopeak relations. If both the two sensing values fall within the corresponding energy windows respectively, the event location along the long axis of sensor array is determined according to the sensor values with respect to the mapping table mentioned above.

A dual modality probe is disclosed having both a gamma probe sensor and an ultrasound sensor. A dual imaging system is provided having the probe and at least one external gamma imaging detector and a data acquisition computer system for collecting data simultaneously from the gamma probe sensor, the gamma imaging detector, and the ultrasound sensor of the probe. A method for evaluating a target organ of a patient utilizing the probe and imaging system, and performing a biopsy of the organ is disclosed.

A compact, mobile, dedicated SPECT brain imager that can be easily moved to the patient to provide in-situ imaging, especially when the patient cannot be moved to the Nuclear Medicine imaging center. As a result of the widespread availability of single photon labeled biomarkers, the SPECT brain imager can be used in many locations, including remote locations away from medical centers. The SPECT imager improves the detection of gamma emission from the patient's head and neck area with a large field of view. Two identical lightweight gamma imaging detector heads are mounted to a rotating gantry and precisely mechanically co-registered to each other at 180 degrees. A unique imaging algorithm combines the co-registered images from the detector heads and provides several SPECT tomographic reconstructions of the imaged object thereby improving the diagnostic quality especially in the case of imaging requiring higher spatial resolution and sensitivity at the same time.

Described herein is the use of gamma cameras in the fringe field of the MRI system. Specifically, an MR image of the breast with lesion identification is first produced. Then, a gamma camera is attached to the existing breast immobilization system for generating one or more gamma images of the breast. The gamma camera is then removed from the breast immobilization system, and a breast biopsy is performed. The gamma camera can then be used to image the biopsy cores that have been removed from the patient in order to verify that the biopsy cores are radioactive, that the biopsy cores extend from one end of the lesion to the other and have a radioactive profile in which the tip is not as radioactive as the middle, and in which the ratio of amount of radioactivity in the middle of the core to the amount of radioactivity that is present in the tip of the core can be expressed as a ratio.

The invention relates to a simulation test automatic control device for a while-drilling gamma imager. The simulation test automatic control device comprises a sliding guide rail, a rotating driving device, a rotating measuring device, an extendable coupler, a data storage and display interface, a while-drilling gamma imaging body, a gamma imaging measuring module and a stratum simulating shaft, wherein the gamma imaging measuring module is mounted on the while-drilling gamma imaging body; the while-drilling gamma imaging body is connected with the rotating driving device through the extendable coupler and driven by the rotating driving device to rotate; the stratum simulating shaft and the while-drilling gamma imaging body are matched in a cross mode; and the gamma imaging measuring module is connected with the data storage and display interface through a signal wire. The simulation test automatic control device is suitable for simulating the situation that the gamma imager penetrates through stratums of different radioactivity strength under the sliding and rotating drilling states of the gamma imager, the lithological change of the drilled stratum is displayed in real time by processing measured data, and the basic and reliable detecting measure is provided for development, application and popularization of the gamma imager.

The present invention relates to a nanoparticle having a linker connected to a long alkane or alkene chain, and a method for preparing the nanoparticle. The alkyl chain of C10-30 introduced with a ligand of the present invention can be coated on a hydrophobic nanoparticle through a noncovalent bond, enabling easy introduction of various ligands to the nanoparticle, and the nanoparticle having various functional groups prepared using the method can be applied to fluorescent detection, MRI, raman spectroscopy, optical detection, PET, SPECT, or gamma image device, and the ligand of the visualization agents can be modified to be used for new vessels detection, cancer cell detection, immunocyte detection, hepatocyte detection, cell death detection, and gene detection.

An apparatus for imaging a field of view, according to an embodiment of the present invention, comprises an x-ray source positioned adjacent to the field of view, a source mask located between the x-ray source and the field of view having at least one source aperture defined therethrough, and an emission detector, such as a gamma camera, adjacent to the field of view. The apparatus may allow substantially concurrent x-ray imaging and gamma imaging of the field of view.

The invention relates to a gamma-ray imaging device comprising a gamma-camera (10) intended for capturing a gamma-ray image, called a gamma-image, of an observed scene (17), said gamma-camera being provided with a front face (11) and possessing a line of sight (x1'), together with an auxiliary camera (15) intended to capture a visible-light image of the observed scene (17). The auxiliary camera (15) is placed ahead of the front face (11) of the gamma-camera (10) and has an optical axis (x2') which is substantially coincident with the line of sight (x1') of the gamma-camera (10) so that the visible-light image and the gamma-image are captured almost simultaneously with the same line of sight.

Biopsy devices and methods useful with Positron Emission Tomography (PET) and Breast Specific Gamma Imaging (BSGI) are disclosed. A biopsy device including a flexible tube having a side aperture, and a PET or BSGI imageable material disposed within the flexible tube is disclosed. A biopsy method is disclosed that includes advancing a flexible tube having a PET or BSGI imageable material distally through the biopsy device. Various other embodiments and applications are disclosed.

The present invention provides a method for identifying a 3-D event location of a gamma interaction for enhancing the precision of event location determination and improving the practicability of an edge-on ends-read imaging detector. The method establishes two expected photopeak relations and a mapping table for every unit in the sensor array before imaging. In real practice, two sensing values with respect to the energy of scintillation photons generated during the detection on an event are obtained by the edge-on ends-read imaging detector. Furthermore, two energy windows corresponding to each sensing value are determined according to the corresponding expected photopeak relations. If both the two sensing values fall within the corresponding energy windows respectively, the event location along the long axis of sensor array is determined according to the sensor values with respect to the mapping table mentioned above.

The present invention relates to probes for use in the detection, imaging, diagnosis, targeting, treatment, etc. of cancers expressing the gastrin releasing peptide receptor (GRPR). For example, such probes may be molecules conjugated to detectable labels which are preferably moieties suitable for detection by gamma imaging and SPECT or by positron emission tomography (PET) or magnetic resonance imaging (MRI) or fluorescence spectroscopy or optical imaging methods.

The invention discloses an automatic stratum dip angle pickup method based on gamma imaging logging while drilling gamma. The method comprises the steps of obtaining gamma imaging logging while drilling data through logging while drilling; processing the gamma imaging while drillingdata by using an ordered data optimal segmentation method, and automatically identifying depth points of a stratum interface; performing sine curve fitting on the automatically picked stratum interface depth points by using a least square method to obtain an accurate stratum interface sine curve; calculating a stratum relative inclination angle according to the fitted stratum interface sine curve; and calculating a stratum inclination angle by combining the well deviation curve and the stratum relative inclination angle. The defects that manual picking and man-machine interaction picking methods are greatly influenced by experience, low in speed, low in efficiency and the like are overcome, automatic and rapid picking of a stratum inclination angle is achieved, the stratum inclination angle picking precision and efficiency are improved, and the effect of gamma imaging logging while drilling in geosteering is improved.

The invention discloses a while-drilling imaging data processing and transmission method and apparatus. The apparatus comprises a while-drilling imaging data measurement unit which rotates for a cyclealong a drill rod and measures a set quantity of while-drilling imaging data, an imaging data processing and compression unit which performs matrix conversion on the set quantity of the while-drilling imaging data, reserves image change information of a matrix setting position after conversion and discards other values, and a mud pulse device which sends processed matrix information to the groundsurface in a mud pulse way. According to the while-drilling imaging data processing and transmission method and apparatus, key features of data of while-drilling resistivity imaging, gamma imaging and the like can be effectively extracted and transmitted to the ground surface.

A method of supplying a made-to-order flood source includes, in response to receiving an order for a flood source from a customer, selecting a mold from a plurality of molds to meet a size of the flood source ordered. A radionuclide is dispersed in a heat curable matrix material to form a mixture. The mixture is cured in the selected mold by application of heat. The cured mixture may be thereafter removed from the mold and encapsulated to form the flood source. The method allows the finished flood source to be shipped to the customer within twenty-four hours of receiving the order.

The invention provides a method and device for identifying a geological structure of a horizontal well. The method comprises the following steps of: acquiring an actually measured gamma logging curveof a guide hole well section in the horizontal well, an actually measured azimuth gamma imaging logging map of a horizontal well section, and the actually measured gamma logging curve of a straight well closest to the horizontal well; preliminarily determining the geological structure of the horizontal well section according to the actually measured azimuth gamma imaging logging map of the horizontal well section; establishing an initial geometric model for the horizontal well section according to the actually measured gamma logging curve of the straight well or the actually measured gamma logging curve of the guide hole well section, wherein the initial geometric model comprises a well trajectory and a stratum model; adjusting the stratum model in the initial geometric model according tothe geological structure of the horizontal well section; and identifying the geological structure of the horizontal well according to an adjusted geometric model. The method and device for identifyingthe geological structure of the horizontal well can identify different geological structures of the horizontal well and has high identification precision.

A cardiac imaging system employing dual gamma imaging heads co-registered with one another to provide two dynamic simultaneous views of the heart sector of a patient torso. A first gamma imaging head is positioned in a first orientation with respect to the heart sector and a second gamma imaging head is positioned in a second orientation with respect to the heart sector. An adjustment arrangement is capable of adjusting the distance between the separate imaging heads and the angle between the heads. With the angle between the imaging heads set to 180 degrees and operating in a range of 140-159 keV and at a rate of up to 500kHz, the imaging heads are co-registered to produce simultaneous dynamic recording of two stereotactic views of the heart. The use of co-registered imaging heads maximizes the uniformity of detection sensitivity of blood flow in and around the heart over the whole heart volume and minimizes radiation absorption effects. A normalization / image fusion technique is implemented pixel-by-corresponding pixel to increase signal for any cardiac region viewed in two images obtained from the two opposed detector heads for the same time bin. The imaging system is capable of producing enhanced first pass studies, bloodpool studies including planar, gated and non-gated EKG studies, planar EKG perfusion studies, and planar hot spot imaging.

The invention discloses a gamma camera which comprises a first gamma imaging unit and a second gamma imaging unit, wherein the first gamma imaging unit comprises a first coding plate provided with a first pattern formed by a plurality of coding elements and a first detector for detecting a radiation ray penetrating through the first coding plate; the second gamma imaging unit comprises a second coding plate provided with a second pattern formed by a plurality of coding elements and a second detector for detecting the radiation ray penetrating through the second coding plate; and the first pattern and the second pattern form opposite patterns. The invention is characterized in that the longitudinal axes of the first and the second gamma imaging units are in parallel and not coincided, and the same imaging regions are defined; the first and the second gamma imaging units are arranged at the same sides of the same imaging regions; and a shielding piece is arranged between the first gamma imaging unit and the second gamma imaging unit for preventing the radiation ray incident in the first gamma imaging unit and the second gamma imaging unit from mutual interference.