Jiujiang News Network News In 2021, the Third People's Hospital of Jiujiang City invested in the introduction of a series of radiotherapy equipment, including Varian Halcyon medical linear accelerator, Philips large aperture CT analog positioning machine, Varian three-dimensional after-installed brachytherapy machine and a complete set of quality control and auxiliary equipment, hardware facilities jumped a step, stepped into the province's advanced ranks. After a period of installation, trial and personnel training, it was officially put into clinical use a few days ago. The introduction of advanced radiotherapy equipment has supported the progress of advanced radiotherapy technology, and excellent technology has made tumor radiotherapy more and more accurate.
The technologies that can be carried out include conformal intensity-modulated radiotherapy technology (IMRT), volume rotation intensity-modulated radiotherapy technology (VMAT), image-guided radiotherapy technology (IGRT), head stereotactic radiosurgery (SRS), body stereotactic radiotherapy (SBRT), four-dimensional radiotherapy positioning technology (4D-CT-SIM), three-dimensional after-loading brachytherapy technology, multi-mode image registration fusion and automatic image sketching, all of which have reached the domestic level. The arrival of a series of "hard-core" radiotherapy equipment means that the hospital has taken the lead in building a series of high-end radiation therapy platforms in the northern region of Jiangxi, which will surely provide more advanced high-end medical services in China for cancer patients.
Philips large aperture CT analog positioner
Simulated localization is an important part of the pre-radiotherapy, and the simulated positioning machine is one of the key equipment for formulating radiotherapy plans in tumor radiation therapy. The device is equipped with real-time breathing gating, four-dimensional mobile laser light, special carbon fiber metal-free flat bed for radiotherapy, etc., with 4D-CT acquisition function. Its outstanding working ability can not only realize the requirements of four-dimensional accurate positioning of radiotherapy, but also undertake the important tasks of clinical image diagnosis of major organs throughout the body, puncture under CT guidance, radioactive particle implantation, etc., which will provide "comprehensive and accurate positioning" services for the examination and treatment of tumor patients. The main features of Philips large aperture CT analog positioning machine are as follows:
1. Large aperture. The machine can provide a large aperture of 85 cm, which can meet all the special scanning position requirements of radiotherapy positioning, 60 cm of real scanning field of view, and complete acquisition of various positions. The check bed positioning accuracy is up to ±0.25 mm, and the bed positioning index allows the positioning system to lock according to the position specified in the treatment plan, providing reliable accuracy for radiotherapy positioning.
2. Special carbon fiber flat bed surface. Unlike the diagnostic CT concave bed surface, the machine is equipped with a special carbon fiber flat bed surface, which ensures the consistency of the simulated positioning scan and the treatment position, providing reliable accuracy for radiotherapy positioning, and the carbon fiber material has minimal influence on the scanned image.
3.4D-CT acquisition (breath gating) function. The machine has advanced 4D-CT positioning function, and provides post-processing reconstruction based on time phase and amplitude to evaluate the movement of tumor targets and organs, greatly reducing the error caused by patient breathing and heartbeat, and can better achieve the lethal dose of tumor tissue, reduce the irradiation dose of normal tissue around the tumor, and better protect normal tissue.
Varian three-dimensional rear-mounted brachytherapy machine
Three-dimensional after-installation brachytherapy, is to first place the applicator (hard tube, hose or needle) in the natural cavity of the human body close to the tumor, in the pipeline (such as uterine cavity, vagina, rectum, bronchial, nasopharyngeal cavity, etc.) or implant the hollow core needle tube into the tumor, and then perform CT or MRI scan to obtain image data, and then through the image transmission system into the treatment plan system, the doctor determines the target range according to the needs of the disease, calculates the dose distribution through the treatment plan system, obtains satisfactory results, and starts the switch under the condition of protective shielding. Radiotherapy of tumors is carried out using computer systems to control the automatic input of radioactive sources from the source tank through the pipeline into the application vessel or into the insertion needle. After the treatment, the radioactive source is automatically returned to the reservoir.
The three-dimensional afterfill is carried out under the guidance of CT or MRI images, and has the characteristics of short treatment distance, high local dose around the radioactive source, rapid reduction of peripheral dose, and short treatment time. Three-dimensional brachytherapy technology combines the advantages of three-dimensional conformal radiotherapy and brachytherapy, objectively evaluates the tumor and the surrounding endangered organs with a three-dimensional reference, can effectively improve the amount of local irradiation of the tumor while protecting the normal tissue around the tumor, when the patient moves or the tumor moves in vivo, the relative position of the radioactive source and the tumor can remain unchanged, and the tumor lesion obtains a high dose of conformity.
What tumors can be treated?
Three-dimensional post-loading radiotherapy equipment has irreplaceable advantages in cervical cancer radiation therapy, its advantages are more precise, safer and more reliable, less side effects, and it is also suitable for endometrial cancer, esophageal cancer, lung cancer, nasopharyngeal cancer and so on.
Case
10 months ago, Ms. Zhou (pseudonym), who lives in Yongxiu County, had vaginal bleeding, followed by an increase in vaginal discharge, thinking that it was just a small problem, not paying attention to it, and did not go to the hospital for examination. Recently, at the age of 60, she experienced increased vaginal bleeding again, accompanied by vaginal fluid. The family rushed him to the Third Hospital of Jiujiang City for treatment, and after the gynecological oncology examination, cervical tumors were found, which were cauliflower-like exogenous. CT examination suggests that cervical cancer is considered to be a soft tissue mass with increased metabolic activity, which involves the uterine body and vagina, and several lymph nodes with increased metabolic activity in the bilateral pelvic cavity consider lymph node metastasis, which is basically confirmed as "cervical cancer stage III".
"People's impression of radiation therapy is external irradiation: a large machine that emits a ray on the patient's lesion can kill all the tumor cells. However, there are some diseases, such as cervical cancer, because the uterus has a natural chamber, and there are no very important sensitive organs around, it will be better to do intraluminal treatment, that is, to let the rays irradiate from the inside, which will achieve a better treatment effect. Liu Li, director of the Radiation Therapy Center, said that if the linear accelerator is likened to "far focus", that is, killing tumor cells from a distance; three-dimensional post-installation radiotherapy equipment belongs to "close attack", close combat to kill tumor cells, and now the "long sword" and "dagger" are all matched.
Director Liu Li directed the three-dimensional rear-loading radiotherapy site
Director Liu Li led the radiotherapy medical staff to cooperate closely and successfully inserted the applicator into the patient's body. Subsequently, the patient was simulated under the Philips large-aperture CT machine, the radiotherapy doctor accurately located the tumor and delineated the target area, and the physicist quickly designed the radiotherapy plan. Finally, the patient was pushed into the rear loading treatment room, and under the precise operation of the radiation therapist, after 10 minutes and 35 seconds of treatment, the three-dimensional post-loading radiation therapy was successfully completed. After completing the treatment, the applicator is removed and the patient returns safely to the ward.
The times are developing, and medical technology and instruments and equipment are also undergoing rapid changes, but the concept of responsibility of the Third People's Hospital of Jiujiang City to serve the people's health wholeheartedly remains eternal. In the future, the hospital will continue to strengthen the mastery of new equipment and new technologies by medical staff, continue to improve the medical service system, and strive to provide more high-quality, efficient and convenient medical services for the people. (Courtesy of the Third People's Hospital of Jiujiang City)