Abstract:
A method and apparatus are used to compare an intended treatment plan using a radiation source with a delivered plan. This done by arranging markers at known three-dimensional (3D) positions in a detection reference system between a two dimensional radiation detector configured to acquire images generated by radiation emitted by the radiation source and an area where the radiation source is positioned during a treatment. The positions of projections of the markers on an image detected are determined when the radiation source is at a treatment position in an intended treatment plan reference system. A plurality of lines in the detection reference system are calculated, each line being defined by a 3D position of a marker and a 3D position of a corresponding projection of the marker on the detector according to the image. A 3D position of the radiation source in the detection reference system is inferred based on the calculated lines. If no correspondence between the detection reference system and the intended treatment plan reference system is available, the inferred 3D position is matched with the treatment position to extract the correspondence between the detection reference system and the an intended treatment plan reference system. If the correspondence between the detection reference system and the an intended treatment plan reference system is available, the inferred 3D position is compared with the treatment position.
Abstract:
The present invention relates to method for generating planning data or control data for a radiation treatment, comprising the following steps: acquiring segmented data of an object which contains a treatment volume and a non-treatment volume; modelling at least some or all of the volume or surface of the treatment volume as a source of light or rays exhibiting a predefined or constant initial intensity; modelling the non- treatment volume as comprising volumetric elements or voxels which each exhibit an individually assigned feature or attenuation or transparency value (t min ≤ t ≤ t max ) for the light or rays which feature is assigned to the light or ray or which attenuation or transparency maintains or reduces the intensity of the light or ray as it passes through the respective volumetric element or voxel, wherein the feature or attenuation or transparency value is individually assigned to each volumetric element or voxel of the non-treatment volume; defining a map surface which surrounds the treatment volume or the object; calculating an accumulated intensity value for points or areas on the map surface, the accumulated intensity being the sum of the intensities of all the rays which exhibit the predefined or constant initial intensity and are emitted from the volume or surface of the treatment volume and reach a respective point on the map surface preferably by following a straight line, wherein if the ray passes through a non-treatment volume or voxel, the intensity of the respective ray is reduced or attenuated by a factor which is determined by the individual feature or attenuation or transparency value of the respective non-treatment volume or voxel; and generating an intensity distribution on the map surface using the calculated accumulated intensities.
Abstract:
A surface covering that is a multilayered composite material. The multilayer composite material includes a top facing layer of polymeric film and a bottom layer of unsupported foam.
Abstract:
Embodiments of the invention relate to a method and apparatus for displaying information. In a specific embodiment, at least two pluralities of voxel values for a corresponding at least two functions with respect to at least a portion of a subject can be obtained. The at least a portion of the subject can have a plurality of local volume elements, where the at least two pluralities of voxel values for the corresponding at least two functions each correspond to the plurality of local volume elements. In this way, there is a voxel value for each function for each local volume element of the portion of the subject. Each of the at least two pluralities of voxel values represents the value of the corresponding function of the at least two functions for the corresponding plurality of local volume elements. A representation is created where the value of one of the at least two functions is on a first axis and a count of voxels is on a second axis. The count of voxels on the second axis is at least a portion of the count of voxels having the value of the one of the at least two functions on the first axis. In another embodiment, the value of the other one of the at least two functional mechanisms can be on a third axis. The count of voxels on the second axis can then be the count of voxels having the value of the one of the at least two functional mechanisms on the first axis and having the value of the other one of the at least two functional mechanisms on the third axis.
Abstract:
A computing system determines a full motion range of a target, wherein the full motion range of the target defines an internal target volume (ITV). The computing system identifies a partial motion range of the target, wherein the partial motion range is a subset of the full motion range of the target. The computing system generates a partial-ITV based on the identified partial motion range, wherein the partial-ITV is a volume swept by the target as the target moves through the partial motion range, the partial-ITV being smaller than the ITV. The computing system generates a treatment plan to deliver treatment to the partial-ITV.
Abstract:
A path of a particle beam is determined through a 3D planning treatment volume (PTV), wherein the PTV includes a set of slices in a depth order, and each slice includes a set of locations. For each slice, the set of locations are grouped into a set of lines along a selected direction, wherein each line is a straight line and includes a starting location and an ending location, and each line is connected to one or two other lines, and the connecting connects two lines to either the starting location or the ending location of the lines to form a tour, and the tours are connected through the slices in the depth order to form the path of the particle beam.
Abstract:
Die Erfindung betrifft ein Verfahren zur Bildbearbeitung, wobei ein erstes CT-BiId (PL-CT) eines Objektes, welches ein Zielobjekt enthält, vorliegt, umfassend Bildpunkte und ihnen zugeordnete Bildpunktwerte, sowie ein zu einem anderen Zeitpunkt erfasstes zweites Bild (K-CT) des Objektes. Das erste CT-BiId (PL-CT) und das zweite Bild (K-CT) werden hinsichtlich des Zielobjektes miteinander verglichen. Unter Berücksichtigung des Vergleichs wird eine Bewegung des Zielobjektes innerhalb des ersten CT-Bildes (PL-CT) durchgeführt, indem eine Neuzuordnung von Bildpunktwerten zu Bildpunkten vorgenommen wird. Dieses Verfahren eignet sich insbesondere zum Einsatz bei einer Bestrahlungsplanung.
Abstract:
One provides (101) a plurality of different treatment plans for a given patient, wherein at least one such plans is provided by using deformation information that is obtained by using historical information for persons other than the given patient regarding physical changes over time as correspond to at least one volume within the given patient and/or calculated information regarding physical changes as correspond to the at least one volume within the patient. Obtained data (102) as pertains to the patient is then used to select (103) a particular one of the aforementioned plurality of different treatment plans.
Abstract:
A method for making a beam modifier to be used in radiation therapy includes defining a region of interest in a patient that is to receive radiation, with the region of interest being defined using an anatomy coordinate system format. Radiation treatment parameters are defined for the defined region of interest, and correspond to an initial type beam modifier to be coupled to an output of a radiation device. Design data on a beam modifier to be placed on the skin of the patient is generated, with the design data being based on the defined region of interest and the defined radiation treatment parameters for the defined region of interest. The design data is in the same anatomy coordinate system format as the defined region of interest that is to receive the radiation. The design data is treated as a new region of interest.
Abstract:
Die Erfindung betrifft eine Lehre zur Planung einer Bestrahlung von zwei Zielvolumen (81, 92) mit einem Zielpunkte (72) anfahrenden Strahl zur Deposition einer ersten Zieldosisverteilung in einem ersten der zwei Zielvolumen (81, 92) und einer zweiten Zieldosisverteilung in einem zweiten der zwei Zielvolumen (81, 92). Die Lehre ist gekennzeichnet durch die Schritte: Zuordnen von Zielpunkten (72) zu einem der Zielvolumen (81, 92), Feststellen einer Überlagerung von einer ersten Deposition verursacht durch das Anfahren eines dem ersten Zielvolumen (81, 92) zugeordneten Zielpunkts (72) mit einer zweiten Deposition verursacht durch das Anfahren eines dem zweitem Zielvolumen (81, 92) zugeordneten Zielpunkts (72) und Anpassen der Planung für zumindest einen der Zielpunkte (72), dessen Anfahren zu der Überlagerung der ersten und zweiten Deposition beiträgt.