Embodiments of the present disclosure provide a method and an apparatus of correcting a collimator, which may correct a position of a collimator of a gamma knife apparatus. The method includes: separately obtaining a projection image of rays sequentially passing through collimation holes and an isocenter plane in the collimator in cases where the collimator moves to M positions; determining a target position with a highest degree of alignment of the collimator from the M positions according to obtained projection images of rays; recording position parameters corresponding to the target position, so as to control the collimator to move to the target position in a case where the a gamma knife apparatus is used for treatment.

A shielding apparatus is provided. The shielding apparatus includes: at least one shielding shell segment, the at least one shielding shell segment constituting a shielding chamber, the shielding chamber being arranged on a periphery of a radiation device and shielding radiation generated by the radiation device. The shielding chamber is arranged on the periphery of the radiation device, and the shielding chamber at least partially shields scattering radiation generated by the radiation device, which can thus reduce the requirements of the radiation device for radiation shielding of a dedicated machine room or get rid of the dependence of the radiotherapy device on a dedicated machine room.

Devices, systems, and methods for planning radiosurgical treatments for neuromodulating a portion of the renovascular system may be used to plan radiosurgical neuromodulation treatments for conditions or disease associated with elevated central sympathetic drive. The renal nerves may be located and targeted at the level of the ganglion and/or at postganglionic positions, as well as preganglionic positions. Target regions include the renal plexus, celiac ganglion, the superior mesenteric ganglion, the aorticorenal ganglion and the aortic plexus. Planning of radiosurgical treatments will optionally employ a graphical representation of a blood/tissue interface adjacent these targets.

A positioning method realized by a computer including acquiring a gamma angle for treatment; acquiring first coordinates of a treatment couch, the first coordinates being coordinates of the treatment couch when a preset shooting point coincides with an imaging point of an image guidance system (IGS); determining a first relative position between a target point of an affected part and the imaging point according to the gamma angle for treatment; acquiring a second relative position between the imaging point and an equipment isocenter; calculating second coordinates of the treatment couch at the gamma angle for treatment when the target point coincides with the equipment isocenter according to the first coordinates, the first relative position and the second relative position; and adjusting a position of the treatment couch according to the second coordinates.

The present disclosure falls into the field of medical apparatus, and discloses a radiation therapy apparatus and a beam imaging method, wherein the radiation therapy apparatus includes: a treatment head including multiple radiation sources distributed on one side of a target region, radiation beams emitted by the multiple radiation sources intersecting in the target region, and a lesion being located within the target region; a beam detector used for receiving a radiation beams passing through the lesion and emitted by the radiation sources to acquire projection data of each radiation beam passing through the lesion, and generating a slice image of the lesion according to the acquired projection data; and a processor used for constructing an image of the lesion in the target region based on the slice image generated by the beam detector. The radiation therapy apparatus of the present disclosure can implement a three-dimensional imaging process in real time, the treatment head of the beam therapy apparatus can be directly used for tracking tumors, and the human body can be positioned according to the reconstructed three-dimensional image before surgery.

Systems and methods including a material that emits high energy beta particles to destroy cancer cells contained in cancerous tumor or tissue. Electronic neutron generators produce neutrons with energies that have a high probability to interact with the material yttrium-89 to produce yttrium-90. Yttrium-90 emits beta radiation with a maximum energy of about 2.25 MeV and a half-life of about 64 hours, which decays to stable zirconium. Stable yttrium-89 can be directly placed in or around cancerous tissue and irradiated with neutrons in the 0.1-15 KeV energy range to produce significant amounts of yttrium-90. The beta radiation emitted by yttrium-90 will primarily destroy the more radiation sensitive cancer cells within the range of the beta particles. The resulting zirconium isotope is not radioactive such that no further radiation is released. A low probability gamma is also created that will assist in cancer cell destruction.

A method for calibrating an alignment device includes obtaining one or more projection images of a phantom having one or more surface indicators, the one or more surface indicators indicating a first coordinate system relating to the phantom, an origin of the first coordinate system overlapping with a calibration point of the phantom. The method further includes determining a difference between the first coordinate system and a second coordinate system based on the one or more projection images, the second coordinate system being relating to a medical system. The method further includes adjusting the phantom to an updated state according to the difference between the first coordinate system and the second coordinate system such that the first coordinate system overlaps with the second coordinate system. The method also includes adjusting an alignment device according to the one or more surface indicators in the updated state.

A radiosurgical method for treating cardiorenal disease of a patient, the method including directing radiosurgery radiation from outside the patient towards one or more target treatment regions encompassing sympathetic ganglia of the patient so as to inhibit the cardiorenal disease. In an exemplary embodiment, the method further includes acquiring three dimensional planning image data encompassing the first and second renal arteries, planning an ionizing radiation treatment of first and second target regions using the three dimensional planning image data so as to mitigate the hypertension, the first and second target regions encompassing neural tissue of or proximate to the first and second renal arteries, respectively, and remodeling the target regions by directing the planned radiation from outside the body toward the target regions.

A radiotherapy device, a control driving method thereof, and a radiotherapy system are disclosed. The radiotherapy device includes a radioactive source apparatus, the radioactive source apparatus includes a source carrier and a collimator, the source carrier is provided with a plurality of radioactive sources thereon, an angle of the plurality of radioactive sources in a longitude direction is within a preset angle range; the collimator is provided with a collimating hole thereon, and radiation beams emitted from the plurality of radioactive sources intersect at a common focus after passing through the collimating hole on the collimator.

A radiotherapy device and a control driving method thereof are provided. The radiotherapy device includes a radiation source apparatus, the radiation source apparatus includes a plurality of radiation sources and a collimator, and source points of the plurality of radiation sources are within a preset included angle range in a longitude direction. The preset included angle range is 5 to 60 degrees. The collimator is provided with a plurality of collimating hole groups, and an included angle of each of the collimating hole groups in the longitude direction is within the preset included angle range; and each of the collimating hole groups includes a plurality of collimating holes, and radiation beams emitted from the plurality of radiation sources intersect at a common focus after passing through the collimating holes of the collimating hole groups.