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Today, many modern radiotherapy techniques have been developed and are bringing good results in radiation therapy for cancer. One of the modern radiotherapy techniques being applied today is VMAT radiation therapy.
1. Volume-modulated radiation therapy (VMAT)
Volume Modulated Radiation Therapy (VMAT-Volumetric Modulated Arc Therapy or Rapid Arc) is one of the best radiotherapy techniques available today for head and neck tumors. The level of accuracy of this technique is almost absolute, it is possible to check the position of the tumor to be treated accurately through each radiation session by the tomography system right on the table of the radiotherapy machine, also known as radiotherapy. Below picture instructions.Arc volume modulated VMAT radiotherapy technique can deliver whole brain radiation dose with hippocampal preservation while integrating radiotherapy dose into metastatic nucleus to achieve radiation dose equivalent to radiosurgery for brain tumors.
Xạ trị điều biến liều thể tích (VMAT)
Image-guided radiotherapy is the use of two-dimensional (kV or MV digital X-ray) or three-dimensional (cone-beam CT) images taken before or during radiation therapy against images when planning simulation, ensuring that the patient's position during actual treatment is exactly the same as in the planning simulation.
2. Indications for arc volume modulated radiotherapy VMAT
The patient has been diagnosed with cancer, has multiple brain metastases, is in good condition, and has a prognosis of ≥ 3 months of survival. The patient was diagnosed with brain metastases due to cancer, with indications for palliative radiotherapy. Important organs of the head and neck region including the hippocampus, optic nerve, optic nerve, eye, and brain stem were also identified.
3. Advantages of VMAT . volume-modulated radiotherapy
VMAT arc volume modulated radiotherapy for brain metastases is safe, with improved survival and toxicity similar to conventional techniques. VMAT is capable of delivering extremely precise “3D sculpted” dose delivery with 360-degree rotation of the dose rig in single or multi-arc treatment. VMAT radiation therapy is capable of delivering radiation doses to the whole brain with preservation of the hippocampus, and at the same time integrating radiation doses directly into the metastatic nucleus to achieve radiation doses equivalent to radiosurgery for cancer cases. neck head. Radiation/chemotherapy side effects are minimal. VMAT radiation therapy focuses high doses at the tumor while reducing the minimum dose for surrounding healthy organs, thereby helping to reduce the side effects caused by radiation therapy. The dose of radiation on healthy tissue (such as the parotid gland) is greatly reduced compared to previous techniques, and patients are less likely to experience dry mouth. VMAT radiotherapy treatment time is faster than conventional radiotherapy. With conventional dose-modulated radiotherapy, the radiotherapy machines must rotate several times around the patient or the system must stop repeatedly to be able to treat the tumor from different angles. For the VMAT radiotherapy technique, the radiation dose can be delivered to the entire tumor in just one 360-degree rotation, and the procedure usually takes less than 2 minutes. RapidArc radiotherapy technology delivers dose-modulated radiation therapy for head and neck cancer up to 8 times faster than previous techniques. The system's algorithm ensures almost absolute accuracy in treatment, thereby optimizing surrounding healthy tissue. VMAT is different from existing techniques such as spiral dose modulated radiotherapy or circular dose modulated radiotherapy (IMAT), because it provides dose to the entire body. volume to be treated, instead of dividing by slices. Furthermore, the treatment planning algorithm ensures the accuracy of the dosing process, while helping to minimize dose exposure to surrounding healthy tissues. The planning of radiation therapy is extremely fast, simple and accurate. Medical staff can quickly plan treatment. The radiation is focused according to the shape and size of the tumor. The surrounding benign tissue is not affected by radiation.
4. Procedure for performing VMAT . radiotherapy
Step 1
The doctor examines and diagnoses the disease. Radiation therapists include radiation therapists, radiation engineers, and radiotherapy technicians. Conduct therapeutic consultation. CT/MRI scan simulates radiation therapy. Radiation Therapy Planning (approximately 20 days ~ 3 - 4 weeks) The radiotherapy doctor and engineer plan and evaluate the patient's radiation therapy plan meticulously and accurately. Once approved, the plan will be transferred to the Radiotherapy Technician. Based on the plan, proceed to locate the patient on the radiotherapy table using the symbols on the patient's mask or markings on the patient's skin. Step 2
Validate the plan: Digital X-ray check before treatment. At the start of treatment, the person will receive written instructions on how to take care of themselves during treatment. Once the patient is in the correct position, the radiotherapy technician will leave you alone in the room for the duration of the radiotherapy and will be monitored by camera during the procedure. The treatment is quick and painless because most of the healthy tissue is shielded from the radiation beam. The average treatment time with VMAT radiotherapy technique is from 2.4 minutes for 2 arcs. Step 3
After treatment: monitor and check the improvement of the patient. After 20 days of radiation therapy, take an MRI to check and evaluate the results
5. Where is volume-modulated radiotherapy?
Trung tâm xạ trị Vinmec Times City đi đầu, làm chủ hầu hết các kỹ thuật xạ trị từ cơ bản đến các kỹ thuật tiên tiến trên thế giới
Vinmec Times City Radiation Therapy Center takes the lead, mastering most radiation therapy techniques from basic to advanced techniques in the world such as VMAT, SBRT, 4D - Synchronizing breathing... breakthrough and leading in high-tech radiation therapy in Hanoi as well as across the country. The Radiotherapy Center of Vinmec Times City International Hospital has brought successful treatment results to hundreds of cancer patients, affirming the strength of radiation therapy for head - neck, breast, esophageal, lung cancer. , stomach, rectum, cervix... With modern equipment, Truebeam is the most modern radiotherapy machine in Southeast Asia.
Radiation oncology techniques at Vinmec International General Hospital are undertaken by local and international radiotherapy specialists with extensive experience and achievements.
Customers can directly go to Radiation Oncology Center - Vinmec Times City International General Hospital or contact details HERE.
SEE ALSO:
What you need to know about volume-modulated arc therapy (VMAT) Cancer cells "evaporate" thanks to millimeter-standard radiation therapy The "revolution" in radiation oncology
