What are the methods of radiotherapy of nasopharyngeal carcinoma

By | April 14, 2012

What are the methods of radiotherapy of nasopharyngeal carcinoma with reference to clinical examination, imaging materials, design of radiation fields such as pathology, radiation field in the first stage of tumor dose in 3 to 4 weeks and a half weeks, up to 36 – 40 Gy (Gy) . In the second phase of tumor regression by the degree to adjust the radiation therapy field. Radical radiotherapy of nasopharyngeal carcinoma and skull base in nasopharyngeal exposure 6 – 8 weeks to tumor dose of 60 – 80 Gy; radical lymph node radiation dose in 6 – 7 weeks, tumor dose given to 60 – -70 Gy, if the element is the neck lymph node metastasis when given 45 – 50 Gy doses of prevention.
What are the methods of radiotherapy of nasopharyngeal carcinoma 2. Nasopharyngeal afterloading intracavitary radiotherapy with high dose rate according to the source of micro-C98), computer-controlled motor correctly transported to the irradiated area of radioactive sources, to do the treatment planning system individualized program design, more effective. Earlier stage of disease present in conventional external beam NPC to a certain dose, high dose rate brachytherapy combined with intracavitary brachytherapy, or radical external beam radiotherapy for nasopharyngeal wall after the more limited residual or recurrent lesions, can be added with high dose rate brachytherapy afterloading intracavitary radiotherapy fill volume, to obtain better results.
3. Stereotactic radiotherapy for stereotactic radiotherapy, that is, X knife. Is to use high-energy linear accelerator X-Harness occurred on the irradiated parts of Ono and other centers with multiple rotating irradiation. This approach has the advantage of both strictly protected the vital organs near the nasopharynx or from the less affected by radiation exposure, but also to get the maximum tumor doses possible, to effectively kill tumor cells.NPC patients treated early process in sufficient external irradiation, a tumor of parapharyngeal space or near the base of the skull bone destruction residual not control, lesions less than 4cm in diameter, with stereotactic radiosurgery for residual lesions fill volume.Nasopharyngeal carcinoma patients with relapse after adequate exposure, confirmed by pathology, with external beam and stereotactic radiotherapy for lesions to push high-dose, the effect is satisfactory.
What are the methods of radiotherapy of nasopharyngeal carcinoma, 4. Intensity modulated radiation therapy is currently using intensity modulated radiotherapy of nasopharyngeal carcinoma is still in the exploratory stage. High-dose conformal radiotherapy to the tumor area distribution and fitness of three-dimensional shape of much improved over conventional external beam radiotherapy.

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