Chinese hospital successfully implemented radioactive particle implantation surgery with 3D printing technology

Surgery, radiotherapy, and chemotherapy have always been the three "weapons" for cancer treatment. However, some patients can no longer perform these treatments or treatments after recurrence and metastasis. In the face of tumors, they can only wait passively. Recently, Professor Wang Ruoyu, deputy dean of Zhongshan Hospital affiliated to Dalian University and a tumour treatment expert, led the team to successfully perform radioactive particle implantation on head and neck tumors, respiratory tumors, digestive system tumors, and urinary system tumors using 3D printed template-oriented technology. More than ten cases. Among them, the operation of a liver cancer patient with brain metastases is the first in Liaoning Province and even in the country. This more precise and standardized radioactive particle implantation treatment technology will bring hope to the survival of many cancer patients who have been "sentenced" to death.

Radiation particle implantation close-up "killing" tumor cells

Not long ago, Mr. Zhang, who was in his prime, suddenly felt his numbness on his right side. He was shocked by the brain metastasis treatment of liver cancer four years ago. He quickly went to the hospital for examination and found that there was a position in the intracranial parietal lobe. A huge tumor is a recurrence of brain metastases. However, he was transferred to Dalian and many hospitals in China, and was told that he could no longer carry out related treatment. With the last hope, he walked into the clinic of Professor Wang Ruoyu from Zhongshan Hospital affiliated to Dalian University.

Wang Ruoyu patiently introduced that radiotherapy is an indispensable part of solid tumor treatment. Conventional radiotherapy refers to “external irradiation”. Rays must pass through normal tissues. Repeated high-dose irradiation will cause serious damage to brain tissue. His current situation does not cure radiotherapy. However, radioactive particle implantation technology is a new and cutting-edge technology, which can be called "internal irradiation". Wang Ruoyu started freehand particle implantation as early as 2000. After the particles are accurately implanted into the tumor through the puncture technique, the tumor will continue to be brachytherapy, and the tumor will gradually shrink or even disappear. This will undoubtedly significantly extend their survival for patients with other treatments such as Mr. Zhang who are already ineffective or intolerant.

Chinese hospital successfully implemented radioactive particle implantation surgery with 3D printing technology

Under the leadership of Wang Ruoyu, the team of the Department of Oncology, Radiotherapy, and Neurosurgery passed a strict preoperative design, and opened a bone window with a diameter of 2 to 3 cm for the patient. The patient successfully performed the particle using digital 3D printing template guiding technology. After the implantation, the patient has now been discharged home, the limb muscles return to normal, and the condition is stable. Wang Ruoyu told reporters that in recent years, radioactive particle implantation technology has made great progress in the treatment of intracranial tumors, patiently introducing the frontier information of cancer treatment to patients, bringing new hope to patients, this is a tumor The doctor should do it.

3D print templates make particle implantation more precise

Radioactive particle implantation technology requires extremely strict dose distribution. Strict design before surgery is the key to ensure accurate operation and successful operation. However, the traditional treatment mode is intraoperative hand puncture, the puncture needle can not be fixed, relying on the doctor's "feel" and experience, it is difficult to copy the preoperative plan, and may even puncture the blood vessel due to the patient's subtle tissue peristalsis. The former design became a piece of paper.

In recent years, with the wide application of 3D printing technology in the medical field, the problem of particle implantation technology has been broken for many years. Professor Wang Ruoyu told reporters that 3D printing individualized template is to input CT and other image data into the Radioactive Particle Therapy Planning System (TPS) for preoperative positioning of each patient, and tailor the patient to match its anatomical structure and puncture needle path. template. Before the operation, the oncologist and the radiotherapy physicist accurately designed the target particle dose distribution. The surgeons avoided the blood vessels, nerves and organs according to the designed depth, angle and number of implanted particles. Precise puncture implantation. With the 3D template, not only the operation time is greatly shortened, the trauma to the patient is reduced, but more importantly, the dose control is strictly guaranteed, which is conducive to improving the quality of life of the patient.

"For some patients with cancer, particle implantation is the last hope for their survival. The long-term acceptance of various treatments, the patient's body and mind are subject to a great burden. Therefore, when doctors are engaged in radiation particle implantation, Not only to meet the clinical needs of patients, but also to ensure maximum accuracy and reduce the suffering of patients." Wang Ruoyu said.

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