Abstract: A computer implemented method for determining a two dimensional DRR referred to as dynamic DRR based on a 4D-CT, the 4D-CT describing a sequence of three dimensional medical computer tomographic images of an anatomical body part of a patient, the images being referred to as sequence CTs, the 4D-CT representing the anatomical body part at different points in time, the anatomical body part comprising at least one primary anatomical element and secondary anatomical elements, the computer implemented method comprising the following steps: acquiring the 4D-CT; acquiring a planning CT, the planning CT being a three dimensional image used for planning of a treatment of the patient, the planning CT being acquired based on at least one of the sequence CTs or independently from the 4D-CT, acquiring a three dimensional image, referred to as undynamic CT, from the 4D-CT, the undynamic CT comprising at least one first image element representing the at least one primary anatomical element and second image elements represen

Abstract: A data processing method performed by a computer for determining breathing signal data which represents a breathing cycle of a patient, comprising the steps of: —acquiring image data representing a sequence of training thermal images of at least a part of the surface of the patient's body over time, the sequence covering at least one half breathing cycle and being captured by a thermographic camera; and —tracking at least one tracked point in the image data over the sequence of training thermal images to find a trajectory of the tracked point as the breathing signal data, wherein the tracked point is a point on the surface of the patient's body.

Abstract: A dynamic anatomic atlas is disclosed, comprising static atlas data describing atlas segments and dynamic atlas data comprising information on a dynamic property which information is respectively linked to the atlas segments.

Abstract: Disclosed is a method for determining a deviation of the position of an anatomical body part relative to a predetermined position defined by a radiation treatment plan. A monitoring image is taken of the anatomical body part at the instant that a predetermined control point defined in the treatment plan has been reached. The monitoring image is compared to a simulated image simulated from a planning image of the anatomical body from the perspective of a monitoring camera used to generate the monitoring image. The comparison allows for a determination of whether there is a positional deviation.

Abstract: A computer-implemented medical data processing method for determining a difference in position of an imaged anatomical body part of a patient, the method comprising executing, on at least one processor of at least one computer, steps of: acquiring, at the at least one processor, first patient image data describing a digital image of a first anatomical body part during a first phase of inspiration and the position of the first anatomical body part during the first phase of inspiration in a first reference system associated with the first image data; acquiring, at the at least one processor, second patient image data different from the first patient image data and describing a digital image of the first anatomical body part during a second phase of inspiration and the position of the first anatomical body part during the second phase of inspiration in a second reference system associated with the second image data; acquiring, at the at least one processor, position transformation data describing a transformatio

Abstract: The presently described method is directed to determining a way of positioning a patient before execution of a medical procedure involving irradiating the patient with ionizing treatment radiation based on comparing medical images of the patient with a pre-acquired medical image. The planning computed tomography is searched for an image of the reference structure in order to determine the position of the patient relative to a patient support device. A retroreflective marker device, having a known and advantageously fixed position relative to the base plate, is detected by a navigation system operatively coupled to a motor of the support device. Based on the detected position of the marker device, the motor of the support device is activated to drive the patient into a desired position relative to beam direction along which the treatment radiation is to be issued towards the patient to execute the medical procedure.

Abstract: Disclosed is a method for determining a deviation of the position of an anatomical body part relative to a predetermined position defined by a radiation treatment plan. A monitoring image is taken of the anatomical body part at the instant that a predetermined control point defined in the treatment plan has been reached. The monitoring image is compared to a simulated image simulated from a planning image of the anatomical body from the perspective of a monitoring camera used to generate the monitoring image. The comparison allows for a determination of whether there is a positional deviation.

Abstract: A data processing method performed by a computer for monitoring the position of a patient, comprising the steps of: acquiring a 3D image dataset of the patient; acquiring an initial real image of the patient from a medical imaging system having a known and fixed location in space, thus defining a known viewing direction of the initial real image in space, the real image being taken at a first point in time; —performing 2D/3D registration by calculating a simulated image from the 3D image dataset which matches the initial real image best, the simulated image having a viewing direction onto the 3D image dataset; storing an initial similarity measure value for the pair of the initial real image and the calculated simulated image; —acquiring a subsequent real image from the medical imaging system taken at a second point in time later than the first point in time; calculating a subsequent similarity measure value for the pair of the subsequent real image and the calculated simulated image; and outputting an indica

Abstract: The disclosure is directed to a radiotherapy system having a treatment device for treating a treatment body part of a patient with a treatment beam arrangement. The treatment device is included with a couch for placing the patient and includes a medical imaging devices for outputting three-dimensional cone-beam computed tomography images to a computer, and a medical imaging x-ray device for generating at least one x-ray image, if the patient is placed on the couch for treatment, and for outputting at least one x-ray image to the computer. The system will output movement control data to control the relative position of the treatment body part relative to the treatment beam if it is determined there is the offset between the position of the treatment body part relative to the bony structure as described by the image data and the position of the treatment body part relative to a bony structure.

Abstract: Disclosed is a method for determining a deviation of the position of an anatomical body part relative to a predetermined position defined by a radiation treatment plan. A monitoring image is taken of the anatomical body part at the instant that a predetermined control point defined in the treatment plan has been reached. The monitoring image is compared to a simulated image simulated from a planning image of the anatomical body from the perspective of a monitoring camera used to generate the monitoring image. The comparison allows for a determination of whether there is a positional deviation.

Abstract: The present invention relates to a computer-implemented medical method for improving the suitability of a tracking structure for tracking by tessellating the tracking structure into a plurality of sub-tracking structures. The invention also relates to a computer configured to execute a program corresponding to the method and a medical system for improving the suitability of a tracking structure for tracking, the system including the aforementioned computer.

Abstract: A data processing method for determining the position of a target, comprising the steps performed by a computer: a) acquiring a target movement model specifying a movement cycle of the target; b) acquiring a target position signal representing a view of the target from a single direction and/or provided by a single imager; c) determining, based on the acquired target position signal and the target movement model, the position of the target.

Abstract: The present invention involves positionally identifying several anatomical structures of interest of a patient's anatomy on images which have been acquired at different points of time. For each anatomical structure a separate image fusion transformation between these images is performed. For at least one of the image fusion transformations it is then determined whether this transformation is within a predetermined threshold, wherein for this determination, at least one further image fusion transformation of another anatomical structure is taken into account.

Abstract: The present invention relates to a method for setting up a patient for radiotherapy, wherein the patient is scanned prior to therapy in both, a free-breathing state and a DIBH-state for which the patient performs a so-called “deep inspiration breath-hold”. The obtained data is registered to a CT-dataset which forms the basis for a treatment plan. The patient is then set up with respect to a radiation treatment apparatus based on the data obtained for the free-breathing state.

Abstract: A computer implemented method for performing fusion of 3D image data, which represent at least a part of a patient's body, with two 2D images of the patient's body with a known spatial relation between the viewing directions of the 2D images, comprising the steps of: —acquiring the 3D image data, —acquiring the two 2D images, —calculating two virtual images from the 3D image data, the two virtual images corresponding to the two 2D images, —classifying the two 2D images into a primary and a secondary image, —determining a primary alignment between the primary image and the corresponding virtual image such that they match, —calculating a spatial axis relative to the viewing directions of the two 2D images from the primary alignment and a predetermined point which is imaged in the virtual image which corresponds to the primary image, wherein the spatial axis is a line in space on which the predetermined point lies, and —performing fusion of the 3D image data with the two 2D images based on the calculated spatial

Abstract: The present invention relates to correlating a position of a radiation beam with a position of a target to be irradiated which is contained in a structure having a repetitive motion comprising a plurality of successive motion cycles. External position data is acquired, which describes a position the structure during different motion cycles and/or time periods. Target data is acquired, which describe a position of the target during the motion cycles and/or time periods. A correlation model is generated, which correlates the external position and the target position. A predicted target position during a motion cycle is determined based on the correlation model and acquire external position data. Primary verification data is determined that describes an difference between actual and predicted target position. When the prediction is accurate, a further prediction and verification of the target position in later motion cycles can be performed.

Abstract: A method and system supports pre-positioning a patient for treatment by radiotherapy or radiosurgery. The disclosed method encompasses comparing an image of a reference structure having a known position relative to an anatomical body part of a patient, such as a live thermal/infrared image of the reference structure, to a predetermined medical image of the reference structure associated with a known position relative to a reference position, such as a known isocenter of a radiotherapy or radiosurgery apparatus. On that basis, it is determined whether the reference structure has moved relative to the reference position. A decision may be made to determine whether the reference structure and therefore the patient has been correctly positioned and/or kept in his desired position relative to a treatment device, and to compensate for any possible positional deviation by moving the patient.

Abstract: A medical data processing method for tracking the position of a body surface of a patient's body, the method comprising determining, based on initial surface reflection data and reflection pattern registration data, body surface movement data describing whether the body surface has undergone a movement.

Abstract: A computer implemented method for determining a two dimensional DRR referred to as dynamic DRR based on a 4D-CT, the 4D-CT describing a sequence of three dimensional medical computer tomographic images of an anatomical body part of a patient, the images being referred to as sequence CTs, the 4D-CT representing the anatomical body part at different points in time, the anatomical body part comprising at least one primary anatomical element and secondary anatomical elements, the computer implemented method comprising the following steps: acquiring the 4D-CT; acquiring a planning CT, the planning CT being a three dimensional image used for planning of a treatment of the patient, the planning CT being acquired based on at least one of the sequence CTs or independently from the 4D-CT, acquiring a three dimensional image, referred to as undynamic CT, from the 4D-CT, the undynamic CT comprising at least one first image element representing the at least one primary anatomical element and second image elements represen

Abstract: The presently described method is directed to determining a way of positioning a patient before execution of a medical procedure involving irradiating the patient with ionizing treatment radiation based on comparing medical images of the patient with a pre-acquired medical image. The planning computed tomography is searched for an image of the reference stricture in order to determine the position of the patient relative to a patient support device. A retroreflective marker device, having a known and advantageously fixed position relative to the base plate, is detected by a navigation system operatively coupled to a motor of the support device. Based on the detected position of the marker device, the motor of the support device is activated to drive the patient into a desired position relative to beam direction along which the treatment radiation is to be issued towards the patient to execute the medical procedure.