A position detector arranged to be mounted at a radiation detector of a radiotherapy treatment apparatus, which includes a gantry rotatable about a gantry rotation axis, and a collimator rotatable about a collimator rotation axis. The radiation detector is mounted at the collimator. The position detector comprises: an accelerometer device, which is arranged to detect at least gravitational acceleration in at least one dimension; a gyro device arranged to detect at least angular velocity in at least one dimension; wherein the accelerometer device and the gyro device in common are arranged to be operative in three dimensions, and a controller connected with the accelerometer and the gyro; wherein the controller is arranged to receive first input data from the accelerometer device and second input data from the gyro device, and to determine at least a collimator angle and a gantry angle by means of the first and second input data.

A medical data processing method of determining a transformation for determining a breathing state-dependent geometry of an anatomical body part of a patient's body, the method comprising: a) acquiring planning image data describing a set of tomographic medical planning images describing each a different part of the anatomical body part in the same respiratory state called reference planning respiratory state, wherein the anatomical body part is subject to respiratory movement and wherein the planning images comprise a planning image called reference planning image describing a part of the anatomical body part which is called reference planning body part; b) acquiring breathing image data describing a set of tomographic medical breathing images of the anatomical body part, wherein the breathing images comprise a reference breathing image describing the reference planning body part in a respiratory state called reference breathing respiratory state, which is different from the reference planning respiratory state, and a target breathing image describing at least another part of the anatomical body part, wherein the other part of the anatomical body part is called target body part, in a respiratory state called target respiratory state which is different from the reference planning respiratory state; c) determining, based on the planning image data and the breathing image data, reference transformation data describing a transformation, called reference transformation, between the geometry of the reference planning body part in the reference planning respiratory state and the geometry of the reference planning body part in the reference breathing respiratory state; d) acquiring scaling factor data describing a scaling factor which describes a relationship between the geometry of the reference planning body part in the reference breathing respiratory state and the geometry of the target body part in the target respiratory state; e) determining, based on the reference transformation and the scaling factor data, derived transformation data describing a transformation called derived transformation between the geometry of the target body part in the reference planning respiratory state, and the geometry of the target body part in the reference breathing respiratory state.

The present disclosure relates to a system for radiation therapy. The system may include a magnetic resonance imaging (MRI) apparatus and a radiation therapy apparatus. The MRI apparatus may be configured to acquire magnetic resonance imaging data with respect to a region of interest (ROI). The radiation therapy apparatus may be configured to apply therapeutic radiation to at least one portion of the ROI when rotating with a gantry. The radiation therapy apparatus may include an eddy current reduction apparatus coupled to the gantry. The eddy current reduction apparatus may include at least one structure, wherein each of the at least one structure may include a plurality of internal structures and at least some of the plurality of internal structures are electrically disconnected from each other.

The invention relates to a method for determining the position of an object moving within a body, wherein the body is connected to markers, a movement signal is determined based on the measured movement of the markers, images are taken from the object using a camera or detector, wherein the camera or detector is moved with respect to the object, it is determined from which direction or range of angles or segment the most images corresponding to a predefined cycle of the movement signal are taken, and using at least some or all of the images of the segment containing the most images for a specified movement cycle, an image of the object is reconstructed.

Provided is a particle beam treatment apparatus irradiating an irradiation target with a particle beam. The apparatus includes: an accelerator that generates the particle beam in an acceleration space; and an irradiation unit that virtually divides the irradiation target into a plurality of layers and irradiates each layer while performing scanning with the particle beam with a scanning electromagnet. The accelerator includes a particle generation unit generating particles that are to accelerate in the acceleration space, and the accelerator sets a parameter of the particle generation unit based on at least one of the layers of the irradiation target and adjusts an intensity of the particle beam based on the set parameter.

A radiotherapy equipment is provided. The radiotherapy equipment comprises at least two radiation apparatuses, the radiation apparatuses are configured to be capable of emitting radiation beams, the radiation beams emitted by at least two of the radiation apparatuses intersect at an intersection point, the radiation apparatuses are rotatable circumferentially about a rotation axis, and radiation positions of at least two of the radiation apparatuses are positioned at different cross-sections with respect to the rotation axis.

A particle beam detector system can comprise a particle beam generator, a particle beam fluence and position detector array based on Micromegas technology, and data readout electronics coupled to the position detector array. The particle beam fluence and position detector array can comprise a sealed, gas-filled, ionizing radiation detector chamber. A printed circuit board (PCB) can be disposed within the ionizing radiation detector chamber, the PCB comprising a multi-layer array arrangement of interconnected conductive sensor pads comprising three planar coordinate grids, X, Y, and ST (stereo) situated on separate layers of the PCB. The multi-layer array arrangement of interconnected conductive sensor pads can comprise a first footprint. A dielectric lattice structure can be disposed over the PCB and the multi-layer array arrangement of sensors. A conductive mesh structure can comprise a second footprint disposed over the dielectric lattice structure and extending over an entire area of the first footprint.

Disclosed is a computer-implemented method for partitioning a medical image which encompasses acquiring a medical image of a surface of a patient and a surface of at least one object (embodied by image data), for example, by means of a 3D scanning device. Furthermore, a thermal image of the surface of the patient and the surface of the object is acquired (embodied by thermal data), for example, by means of a thermal camera. The medical image and the thermal image are fused (based on registration data), such that the image data is associated with the thermal data (embodied by association data). By analyzing the association data with regard to a specified condition (embodied by condition data), for example a condition related to a temperature threshold, a subset of the association data which fulfills the condition and describes a part of the medical image is determined (embodied by condition compliance data). For example, the object is colder than the skin of the patient, so by applying the temperature threshold, the part of the image representing the object may be identified. Accordingly, a part of the medical image showing a surface of the patient may be distinguished from a part of the medical image showing a surface of the object. Furthermore, and for example, one of those two parts may be defined to be a region of interest, and a positional shift of the region of interest (e.g. a face of the patient) may be determined by tracking the region of interest.

Disclosed is a computer-implemented method for partitioning a medical image which encompasses acquiring a medical image of a surface of a patient and a surface of at least one object (embodied by image data), for example, by means of a 3D scanning device. Furthermore, a thermal image of the surface of the patient and the surface of the object is acquired (embodied by thermal data), for example, by means of a thermal camera. The medical image and the thermal image are fused (based on registration data), such that the image data is associated with the thermal data (embodied by association data). By analyzing the association data with regard to a specified condition (embodied by condition data), for example a condition related to a temperature threshold, a subset of the association data which fulfills the condition and describes a part of the medical image is determined (embodied by condition compliance data). For example, the object is colder than the skin of the patient, so by applying the temperature threshold, the part of the image representing the object may be identified. Accordingly, a part of the medical image showing a surface of the patient may be distinguished from a part of the medical image showing a surface of the object. Furthermore, and for example, one of those two parts may be defined to be a region of interest, and a positional shift of the region of interest (e.g. a face of the patient) may be determined by tracking the region of interest.

A radiation delivery system includes a radiation source to generate a radiation beam to deliver to a target and a multi-leaf collimator (MLC) operatively coupled to the radiation source, wherein the MLC is offset to shift the MLC in a direction relative to a line from the radiation source to a point of interest to cause projections of the radiation beam to be shifted based on the offset.