33 results about "Stereotactic radiotherapy" patented technology

A targeting system for administering radiation to a patient and methods therefor are provided. The targeting system includes a stereotactic frame system for immobilizing the patient; an imaging scanner for acquiring images of a patient's anatomy, wherein at least one image is acquired during a planning phase, and at least one image is acquired during a pretreatment phase; a processor for fusing the planning image to the pretreatment image and for determining a shift, for example, translation and rotation, between the images to locate a predetermined portion of the patient's anatomy; and a radiation source for delivery of radiation to the predetermined portion of the patient's anatomy.

Repeat fixation for medical procedures is accomplished using a non-invasive locator, specifically a face mask. The face mask has at least three fiducial markers on it. By detecting the position of the markers, the position of features within the patient can be determined with great precision. The features can be the location of head or neck cancer or other target to which radiation or other medical procedure is to be applied. Since the face mask has been molded to uniquely fit to the patient's face, it may be removed after an initial imaging of the patient. The face mask may then be re-attached one or more times to the teeth. The face mask is molded to conform to the patient's face by using thermoplastic material.

A fiducial marker system (210a-c) comprises a first unit and a second unit. The first unit is patient affixable and comprises a partly spherical inner surface having a first center point that is adapted to receive a touch probe measurement head for measuring the spatial position of the center point. The second unit is releasably attachable to an outer surface of the first unit, and has a second center point, wherein the first center point and the second center point are substantially identical when the second unit is attached to the first unit. For stereotactic therapy, a patient is imaged with the first and second unit assembled. Then the second unit is detached. A stereotactic frame (300) is attached to the first units via arms. Thus frameless imaging is provided in a frame based stereotactic surgery system with high precision. Repeated assembly of the frame (300) to the first units, remaining in the patient, provides advantageous fractionized stereotactic radiotherapy.

The invention provides a rapid calculation method of stereotactic radiotherapy dosage field distribution and relates to stereotactic radiate oncotherapy dosage field distribution calculation. Dosage calculation speed is an important performance index of treatment plan system software. To meet the clinic computation speed requirement, treatment plan system software manufacturers use special work stations as operation platforms of the plan system software, and the work stations are expensive, complex in maintenance work, high in environment requirement and not convenient to operate. The invention provides the parallel calculation method based on a hardware multi-core processor to achieve acceleration of stereotactic radiate oncotherapy dosage field distribution calculation. Compared with the prior art, the method can be carried out on a microcomputer with GPU equipment or a universal work station, the price is one tenth or less of that of the special work station, and the calculation method has the advantages that hardware cost is low, device maintenance is convenient, the method can be easily used by clinic work staff, calculation speed is high, and the clinic application demand can be sufficiently satisfied.

The invention discloses a stereotactic radiotherapy device and an implementation method of the stereotactic radiotherapy device. Due to the face that electrical control is achieved through eight motors, the defects that an existing gamma ray stereotactic radiotherapy device is complex in structure and high in adjustment difficulty are overcome. Meanwhile, the stereotactic radiotherapy device has the advantages that the device is simple, cost is low, practicability and accuracy are high, adjustment and maintenance are easy, and the transmission dosage in the treatment process is small. The stereotactic radiotherapy device makes a great contribution to the field of treatment of the radiosurgery, and is sure to make a great contribution to tumor control, side effect reduction and the improvement of life quality of patients.

The invention relates to an abdominal binder for auxiliary use of stereotactic radiotherapy treatment. The abdominal binder comprises a balloon, a balloon catheter and an abdominal binder body, wherein a fixing band is arranged at one end of the abdominal binder body, and a fixing band restraint ring is arranged at the other end of the abdominal binder body; two auxiliary braking balloons are arranged on the abdominal binder body, are communicated with the balloon by virtue of the balloon catheter, are in correspondence with the abdominal part of a patient under a using state, and are symmetric to the sagittal plane of a human body; vent holes are formed in the abdominal binder body; the fixing band is a self-adhesive band; and the joint of the balloon and the balloon catheter is provided with a balloon regulating valve. The abdominal binder has a good effect for fixing organs, is convenient to use and operate, is simple in structure and low in cost, is suitable for stereotactic radiotherapy on abdominal organs, and can be used for effectively improving the comprehensive treatment effect of stereotactic radiotherapy.

The invention discloses a full-circumference spherical surface stereotactic radiotherapy device. The device comprises an X-band accelerator, a multi-leaf collimator, a treatment couch, an image system, an EPID, a fixed rack and a rotary rack, the rotary rack is arranged on the fixed rack in a rotatable mode, the treatment couch is fixed relative to the fixed rack, the image system is arranged on the rotary rack, the X-band accelerator is connected to the multi-leaf collimator, and the X-band accelerator is arranged on the rotary rack, so that the X-band accelerator forms spherical irradiationon a treatment center; and the EPID is arranged on the rotary rack, and the EPID is orthogonal to a beam of the X-band accelerator so as to receive residual beams. The full-circumference spherical surface stereotactic radiotherapy device can perform full-circumference spherical surface stereotactic radiotherapy on a patient.

The invention discloses an accelerator non-coplanar radiation therapy device based on a compound dual rotating rack. The device comprises a main frame rotating along the xz plane, a sub-frame rotatably connected with the main frame, the sub-frame rotating along the yz plane, the main frame carrying two sets of CBCT subsystems, two sets of CBCT subsystems arranged orthogonally, and the sub-frame carrying an accelerator radiation head and an EPID flat panel detector. The invention can realize multi-wire beam stereotactic radiotherapy, has simple structure, high isocenter precision, low cost, high operation efficiency and safe treatment.

The invention discloses a tumor local control prediction model construction method, a prediction method and electronic equipment. The model construction method comprises the following steps: acquiring data of screening clinical factors before treatment of a lung cancer patient subjected to stereotactic radiotherapy, data of screening dosimetry factors before treatment, a medical image before treatment and a tumor state after treatment; based on the medical image, obtaining a radiomics score about the medical image; taking the data of the screened clinical factors, the data of the screened dosimetry factors and the radiomics score as input of a comprehensive model, the tumor state after treatment as output of the comprehensive model, training the comprehensive model, and obtaining the comprehensive model. According to the method, all tumor characteristics are comprehensively considered, radiomics characteristics, clinical factors and dosimetry factors are introduced to establish a local control model for predicting one year after primary and metastatic lung cancer patients are subjected to SBRT treatment, and the local control prediction accuracy of one year after the lung cancer patients are subjected to SBRT treatment is greatly improved.

The invention discloses a novel stereotactic radiotherapy system. The range of the incident angle of rays is enlarged, the focus-skin ratio and the dosage rate of a focal point are increased, weight loads of the two sides of a machine head are balanced, in this way, the rotating precision of the machine head is improved, and equipment abrasion is reduced. In the adopted technical scheme, a rotating roller is arranged on a base and can move circumferentially on the base along with the own center axis, a rotating disc sleeves a tray and can automatically rotate under the effect of a driving mechanism of the rotating disc, two treatment head racks are symmetrically arranged on the rotating disc, treatment heads are movably arranged at the lower ends of the treatment head racks respectively and arranged on the treatment head racks through adjusting structures, the adjusting structures are used for ensuring that the rays of the treatment heads are always gathered at the intersecting position of the center axis of the rotating roller and the automatic-rotation axis of the rotating disc, and the included angle formed between the rays of the treatment heads and the automatic-rotation axisof the rotating disc can be adjusted. The novel stereotactic radiotherapy system can be widely applied to the field of radiotherapy.

The invention discloses a stereotactic radiotherapy equipment isocenter calibration device, which comprises an isocenter ball mold assembly, a supporting assembly and a measuring device, and is characterized in that the isocenter ball mold assembly comprises an isocenter ball mold and a cylindrical supporting rod integrated with the isocenter ball mold; the supporting assembly is used for supporting the isocenter ball mold and the supporting rod; the measuring device rotates around the isocenter of the equipment in the first direction and swings along an arc in the second direction, the measuring device can rotate around the axis intersecting with the isocenter so as to measure the position of the isocenter of the radiotherapy equipment, and the isocenter calibration method of the stereotactic radiotherapy equipment is disclosed. The operation method is simple, the position of the isocenter can be quickly determined under the condition that the treatment head does not emit ray beams in the radiotherapy equipment installation and debugging stage, and the radiotherapy equipment installation and debugging efficiency can be improved.

The invention discloses a sacculus lung pushing device indwelt in the pleural cavity through percutaneous puncture. The sacculus lung pushing device comprises a sacculus, a visual mark is arranged in the sacculus, one end of the sacculus is provided with a guide wire, the other end of the sacculus is provided with a catheter which is provided with a connector, the catheter is provided with a dropper, the dropper is provided with a pressure gauge which is connected with a normal saline bag. The lung is pushed away from the chest wall under the minimally invasive condition by means of the sacculus lung pushing device, damage of radioactive rays to soft tissue such as pleura, chest wall ribs and nerves during the large dosage radiotherapy process can be avoided, and therefore pleurisy and rib necrosis after radiotherapy are avoided. A patient can relieve from pain of an operation, and the curing purpose can be achieved through stereotactic radiotherapy treatment. The sacculus lung pushing device indwelt in the pleural cavity through percutaneous puncture can fill up a blank at home and abroad after being implemented, and application of a stereotactic radiotherapy technology in early stage of a lung cancer is more perfect.

The invention discloses an application of CA125 as curative effect evaluation molecular marker to stereotactic radiotherapy (SBRT) of a primary liver cancer patient with a tumor marker negative (CA125 is less than 35.0 U/ml). For CA125 negative primary liver cancer patients, if the serum CA125 concentration is higher than that before treatment 6 months after SBRT treatment, the prognosis is predicted to be poor. When the rising ratio is higher than 150%, the prognosis of the patient is poor for one year and two years; and when the rising ratio is higher than 23%, the prognosis of the patientis poorer for 3 years and 5 years. The invention provides a method for prognosis evaluation of CA125-negative primary liver cancer patients after SBRT treatment for 1-5 years, and the method has important significance in improving the survival rate of liver cancer and reducing the death rate.

The embodiment of the invention provides a method and device for determining advantages and disadvantages of a stereotactic radiotherapy plan. The method comprises the steps that an acquisition module acquires a radiotherapy plan file of a patient; a judgment module obtains the single dose of the radiotherapy plan file; whether the radiotherapy plan file is a stereotactic radiotherapy file is determined according to the single dose; under the condition that the radiotherapy plan file is determined to be the stereotactic radiotherapy file, whether the stereotactic radiotherapy file is complete or not is determined; under the condition that the judgment module determines that the stereotactic radiotherapy file is complete, a processing module processes the radiotherapy plan file to obtain a parameter value related to target region plan evaluation; and the advantages and disadvantages of the stereotactic radiotherapy plan are determined according to the parameter values. Therefore, the evaluation efficiency of the stereotactic radiotherapy plan is higher, no operation error occurs, and the accuracy is higher.