Artifacts in a tomographic image of a subject including a cyclically moving object to be treated are reduced. A radiographic imaging device includes: a gantry that is equipped with two sets of radiation sources and detectors which are used in pairs, the gantry rotating the radiation sources and the detectors around a subject; and a reconstruction section that reconstructs a tomographic image of the subject based on multiple projection images generated from output of the detectors. The radiographic imaging device further includes: a phase calculation section; a divide section that divides, on a phase-by-phase basis, first projection image groups of multiple projection images acquired by the first set, and similarly second projection image groups acquired by the second set; and a condition setting section. The reconstruction section reconstructs a tomographic image by use of the first and second projection image groups that are placed in the same phase.

A system and method is provided for magnetic resonance imaging (MRI) guided respiratory gated radiotherapy using a respiratory motion model. MRI-guided respiratory gating is performed with a continuously updated model that represents a patient's internal anatomy as a mathematical function of an external respiratory surrogate. The motion model may be built and updated by acquiring images of a tissue in a subject and measuring, using the images, a position of the tissue in the images to determine motion of the tissue. The surrogate respiratory signal is acquired contemporaneously with acquiring the images. Motion of the tissue and the surrogate respiratory signal are correlated to create the motion model for the subject and gating a radiotherapy system may then be based upon the motion model. A multi-planar model-based respiratory gating may also be performed by sequentially imaging a stack of adjacent slice positions.

Disclosed herein are systems and methods for adapting and/or updating radiotherapy treatment plans based on biological and/or physiological data and/or anatomical data extracted or calculated from imaging data acquired in real-time (e.g., during a treatment session). Functional imaging data acquired at the time of radiation treatment is used to modify a treatment plan and/or dose delivery instructions to provide a prescribed dose distribution to patient target regions. Also disclosed herein are methods for evaluating treatment plans based on imaging data acquired in real-time.

Disclosed is a computer-implemented method which encompasses comparing the requirements for radiation therapy imposed by a patient's individual condition to the capabilities and requirements of different types of treatment machines to determine a suitable radiation treatment strategy including an identification of the treatment machine which shall be used and a treatment plan. Furthermore, a treatment plan is generated by simulating the envisaged radiation treatment. The type of treatment machine associated with a predetermined value for the sum of weights for all fields assigned to that treatment machine is determined as the treatment machine for treating the patient, and corresponding information is output detailing the treatment specifics such as radiation treatment parameters specifically suited for the patient target region tumor thereby reducing radiation exposure, efficient use of the machine and appropriate gating and tracking modes.

Described herein is a system and method of controlling real-time image-guided adaptive radiation treatment of at least a portion of a region of a patient. The computer-implemented method comprises obtaining a plurality of real-time image data corresponding to 2-dimensional (2D) magnetic resonance imaging (MRI) images including at least a portion of the region, performing 2D motion field estimation on the plurality of image data, approximating a 3-dimensional (3D) motion field estimation, including applying a conversion model to the 2D motion field estimation, determining at least one real-time change of at least a portion of the region based on the approximated 3D motion field estimation, and controlling the treatment of at least a portion of the region using the determined at least one change.

A patient supporting device includes: a base; a positioner; a platform having a first end and a second end; and a controller; wherein the positioner is operable by the controller to place the platform at one of a first plurality of possible positions or at one of a second plurality of possible positions, wherein in any of the first plurality of possible positions, the second end of the platform is closer to one of a left side and a right side of a treatment machine; wherein in any of the second plurality of possible positions, the second end of the platform is closer to another one of the left side and the right side; and wherein a size of a first spatial region defined by the first plurality of possible positions is different from a size of a second spatial region defined by the second plurality of possible positions.

The disclosure provides a system for EGRT. The system may include a radiotherapy device for treating a subject. The radiotherapy device may include a scintillation camera that is directed at an ROI of the subject. The subject may be injected with a radioactive tracer or implanted with a radioactive marker before treatment. The ROI may undergo a physiological motion during the treatment. The system may deliver a treatment session to the subject by the radiotherapy device. During the treatment session, the system may acquire a target image of the ROI indicative of a distribution of the radioactive tracer or the radioactive maker in the ROI by the scintillation camera, and adapt a radiation beam to be delivered to the subject with respect to the physiological motion of the ROI by adjusting the radiation beam based on the target image.

A noninvasive system for imaging, planning, and treating cardiac arrhythmia in a subject includes a noninvasive means for imaging a heart and identifying an arrhythmia including an array of body surface electrodes for noninvasively measuring electrical potentials at a plurality of locations to identify the arrhythmia, and a geometry determining device for noninvasively obtaining a heart-torso geometry. An imaging processor computes heart electrical activity data and generates an image of the heart from the electrical potentials and the heart-torso geometry. A treatment planning system for developing a noninvasive treatment plan for the arrhythmia is configured to import an arrhythmia target defined relative to the image of the heart, and register the imported arrhythmia target to a primary planning dataset. A noninvasive means for treating the arrhythmia includes implementing the noninvasive treatment plan developed by the treatment planning system.

An X-ray irradiating apparatus according to an embodiment is an X-ray irradiating apparatus that can transmit a maintenance electric current for suppressing the motion of a diaphragm in a subject, and includes an electric current outputting unit, electrode units, an electric current output controlling unit and an operating unit. The electric current outputting unit outputs the maintenance electric current for maintaining the contraction of the muscle. The electrode units, which are disposed on a skin surface of the subject, transmit the maintenance electric current. The electric current output controlling unit controls the electric current outputting unit to switch between a state in which the maintenance electric current is output to the electrode units and a state in which the maintenance electric current is not output to the electrode units. The operating unit performs the operation of the electric current output controlling unit.

A camera assembly for use in medical tracking applications having a range camera and a thermographic camera in a fixed relative position. The range camera is configured to acquire a first image of an object at a first instant of time and a second image at a second instant of time. The thermographic camera is configured to acquire a first thermal image of the object at the first instant and a second thermal image at the second instant. A processor identifies at least one point pair in the first thermal image and the second thermal image. The at least one point pair is mapped to corresponding point pairs associated with the first image and the second image. Movement of the object is determined based on the mapping.