A method for determining a radiation treatment plan includes defining a part of a treatment using control points, defining dose calculation points, calculating dose in the dose calculation points, and changing a number of the dose calculation points. A method for determining a radiation treatment plan includes modeling a first part of a treatment plan using a fluence map, and modeling a second part of the treatment plan using a first machine parameter. A method for determining a radiation treatment plan includes determining a plurality of dose calculation points, determining a level of complexity of fluence for one of the plurality of dose calculation points, and converting a fluence map to one or more machine parameters for the one of the plurality of dose calculation points based on the determined level of complexity.
H05G 1/42 - Exposure time using arrangements for switching when a predetermined dose of radiation has been applied, e.g. in which the switching instant is determined by measuring the electrical energy supplied to the tube
2.
INTEGRATED MIS PHOTOSENSITIVE DEVICE USING CONTINUOUS FILMS
An integrated photosensitive device with a metal-insulator-semiconductor (MIS) photodiode constructed with one or more substantially continuous layers of semiconductor material and with a substantially continuous layer of dielectric material.
H01L 31/113 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by field-effect operation, e.g. junction field-effect photo- transistor being of the conductor-insulator- semiconductor type, e.g. metal- insulator-semiconductor field-effect transistor
3.
PREPARATIVE REGIMEN FOR ENGRAFTMENT, GROWTH AND DIFFERENTIATION OF NON-HEMATOPOEITIC CELLS IN VIVO
The invention relates to methods of obtaining an expanded population of mammalian ex vivo cells and/or for treating a mammalian subject by (a) administering to a subject an effective amount of an agent that confers a growth disadvantage to at least a subset of endogenous cells at the site of engraftment; (b) administering to the subject an effective amount of a mitogenic stimulus for the ex vivo cells; and (c) administering the ex vivo cells to the subject, wherein the ex vivo cells engraft at the site and proliferate to a greater extent than the subset of endogenous cells, to repopulate at least a portion of the engraftment site with the ex vivo cells. The repopulated cells can be harvested for further use or be left at the engraftment site of a subject to be treated. The invention also provides methods of treating brain injury in a subject by engrafting ex vivo cells at the site of injury.
A calibration device includes a structure, and a target object that is moveably coupled to the structure, the target object being a physical target towards which an alignment device can be aimed. A calibration device includes a block having a first opening, and a target object that is viewable through the first opening. A method of calibrating an alignment device includes determining a target position associated with a machine, placing a target object at the target position, and adjusting the alignment device using the target object. A calibration device includes a target object, the target object being a physical target towards which an alignment device can be aimed, wherein the target object comprises a first feature for indicating a first orientation of the target object.
A patient treatment system includes one or more automated patient transporters configured to move a patient from a preparation area to one of a plurality of alternative treatment areas, and to position the patient relative to a therapeutic radiation beam. Both transportation of the patient and positioning of the patient are optionally performed while the patient is secured to one of the patient transporters. A control system may be used to both position and transport the patient responsive to a patient treatment plan.
In one example of an embodiment of the invention, a method to correct for ring artifacts in an image is disclosed. A first Cartesian image is reconstructed based on data received from an imaging device, and the first Cartesian image is transformed into a first polar image. A first low-pass filter is applied to the first polar image, in the radial dimension, to form a second polar image, and the second polar image is subtracted from the first polar image to generate a third polar image. A second low-pass filter is applied to the third polar image, in an angular dimension, to form a fourth polar image, and the fourth polar image is transformed to Cartesian coordinates to form a second Cartesian image. The first Cartesian image is corrected based, at least in part, on the second Cartesian image.
A method of constructing a navigation table relating a set of images representative of a region of interest in a subject to a referenc system (30) with reference positions indicating known anatomic landmarks of a reference subject comprising providing reference positions for two or more images (10) identified with two or more anatomic landmarks (20) indicative of the region of interest wit reference positions of known anatomic landmarks corresponding to the identified anatomic landmarks, and determining reference positions for the remaining images by interpolation.
A system for determining a position of an object includes a block having a base, and a plurality of elongate members secured to the block. A system for determining a position of an object includes a processor configured to obtain an image of portions of respective elongated members, and determine a position of an object that is coupled to the plurality of elongated members. A method of determining a position of an object includes obtaining a first image of portions of respective elongated members, and determining a first position of an object using the first image.
This disclosure is concerned with x-ray tube window bonding using a smooth bonding surface. In one example, an x-ray tube window assembly in the evacuated housing of an x-ray tube includes a window frame with a support flange surrounding an aperture, a window constructed to cover the aperture and overlap an area of the support flange of the window frame; and a bond layer connecting the window to the area of the support flange overlapped by the window. The surface of the bond layer in contact with the window is smooth. The bond layer substantially covers the area of the support flange of the window frame overlapped by the window.
A particle beam system (100) for treating a patient at a treatment station (140), which includes a plurality of different particle beam nozzles (130A, 130B, 130C, 130D, 130E) and a transport system (150) for automatically moving one of the plurality of different particle beam nozzles (130A, 130B, 130C, 130D, 130E) from a storage location (150) to one of a plurality of particle beam paths (120A, 120B, 120C, 120D, 120E) in which at least two particle beam paths (120A, 120B) make an angle less or greater than 90 degrees or one particle beam path (120A) on a plane that is different from other plane formed by other two particle beam paths (120B, 120C).
G21G 1/00 - Arrangements for converting chemical elements by electromagnetic radiation, corpuscular radiation, or particle bombardment, e.g. producing radioactive isotopes
A system for remotely venting an expansion bladder employed in a liquid-filled container, such as an outer housing of an x-ray tube. The remote venting configuration provides the expansion bladder with access to atmospheric pressure existing about the x- ray tube so as to enable it to compensate for pressure changes within the liquid-filled container that occur as a result of liquid heating. Further, the remote nature of the bladder venting system enables the expansion bladder to be positioned within a portion of the outer housing that is radiation shielded, while the remote venting portion of the system is positioned in an unshielded portion of the housing. This eliminates the need to perforate the radiation shielding of the outer housing in order to provide atmospheric pressure to the bladder. Further, the remote vent is semi-permeable so as to prevent liquid escape from the system in the event of bladder rupture.
A system and method are provided for a high resolution radiation treatment system which provide for projecting a field of radiation energy at targeted patient tissue. The system uses a multi-leaf collimator (108), which is positioned such that a significant clearance (L1) is provided between the multi-leaf collimator and the isocenter plane (106) where the targeted tissue is located. The leaves of the multi- leaf collimator (108) are designed to provide for high step resolution in the projected radiation energy shape. Additionally, an embodiment of the system and method herein can provide for a high step resolution in the projected radiation energy shape, and for a dose calculation matrix which has matnx units which coincide with the high step resolution in the projected radiation shape.
A system for determining a position of an object includes an imaging system having a x-ray source and an imager, and a processor configured to obtain a tomosynthesis image of an object using the imaging system, and determine a position of the object using the tomosynthesis image. A method of determining a position of an object includes obtaining a tomosynthesis image of an object, and determining a coordinate of the object relative to a radiation machine using the tomosynthesis image. A method of determining a position of an object includes obtaining an image of an object, obtaining a reference image of the object, comparing the reference image with the image, and determining a coordinate of the object based at least in part on a result of the comparing, wherein the reference image has a plane that is parallel with a plane of the image.
An apparatus and method comprising a cathode structure which can be a cylindrical filament coiled in a helix or which can be constructed of a ribbon or other suitable shape. The cathode structure can be heated by passage of an electrical current, or by other means such as bombardment with energetic electrons. Selected portions of the surface of the cathode structure have an altered property with respect to the non-selected portions of the surface. In one embodiment, the altered property is a curvature. In another embodiment, the altered property is a work function. By altering the property of the selected portions of the surface, the electron beam intensity is increased, and the width is decreased.
09 - Scientific and electric apparatus and instruments
Goods & Services
Computer software for identifying structures in a body, namely, bones, organs and other critical tissue for use in the radiotherapy treatment planning field
16.
METHOD AND APPARATUS FOR AUTO-CALIBRATION OF A CT SCANNER
A method of and apparatus for automatically calibrating a computed tomography (旜CT”) scanning system (100) is provided including providing (405) a calibration object (130) substantially centered on a translating table (120) for passing through the CT system (100). The system (100) scans (410) the calibration object (130) and provides (420) a preliminary representation such as a display (500) of a sorted sinogram of the object (130). From that preliminary representation, the system (100) determines intercept-related and/or slope-related values for at least a portion (510, 520, 530 or 540) of the preliminary representation and uses these values to calculate (440) one or more predetermined calibrations values.
Medical apparatus, namely, clinical linear accelerator having diagnostic x-ray source and detector panels and diagnostic x-ray source and detector subsystem for clinical linear accelerators
