[Intensity Modulated Radiation Therapy (IMRT)]. 2006

Katsuya Maebayashi, and Sachiko Nasu, and Kaori Seki, and Makoto Kiyoduka, and Yaichirou Hashimoto, and Norio Mitsuhashi
Dept. of Radiology and Radiation Oncology, School of Medicine, Tokyo Women's Medical University.

Radiotherapy plays an important role in the management of cancer patients, and half of the patients with malignant tumors are treated with radiotherapy in the United States. In Japan, the necessity of radiation therapy has come to be widely acknowledged in cancer treatment, and more and more cancer patients are being treated with radiation. External beam radiation is the most-used radiotherapy at the present time. The advantage is that this treatment modality can be used in a short time, although the problem is that not only the cancer lesion but also the surrounding normal tissue is irradiated,causing an adverse effect on normal tissue. In order to solve this problem,treatments such as 3D-Conformal Radiation Therapy (3D-CRT), Intensity Modulated Radiation Therapy (IMRT), Stereotactic Radiation Surgery (SRS) and Stereotactic Radiation Therapy (SRT) are clinically used as an extremely precise radiotherapy, thanks to the advances in computer technology in recent years. Therefore, the purpose of these extremely precise radiation therapies is to administer a high dose to the tumor intensively, and to suppress quantities of magnetism to normal tissues. IMRT treatment results for prostate cancer patients and head and neck cancer patients are reportedly better than with other irradiation methods. In this chapter,we explain the external irradiation method with the focus on IMRT and the extremely precise radiotherapy preformed in the Tokyo Women's Medical University Hospital.

UI MeSH Term Description Entries
D008297 Male Males
D009369 Neoplasms New abnormal growth of tissue. Malignant neoplasms show a greater degree of anaplasia and have the properties of invasion and metastasis, compared to benign neoplasms. Benign Neoplasm,Cancer,Malignant Neoplasm,Tumor,Tumors,Benign Neoplasms,Malignancy,Malignant Neoplasms,Neoplasia,Neoplasm,Neoplasms, Benign,Cancers,Malignancies,Neoplasias,Neoplasm, Benign,Neoplasm, Malignant,Neoplasms, Malignant
D011471 Prostatic Neoplasms Tumors or cancer of the PROSTATE. Cancer of Prostate,Prostate Cancer,Cancer of the Prostate,Neoplasms, Prostate,Neoplasms, Prostatic,Prostate Neoplasms,Prostatic Cancer,Cancer, Prostate,Cancer, Prostatic,Cancers, Prostate,Cancers, Prostatic,Neoplasm, Prostate,Neoplasm, Prostatic,Prostate Cancers,Prostate Neoplasm,Prostatic Cancers,Prostatic Neoplasm
D006258 Head and Neck Neoplasms Soft tissue tumors or cancer arising from the mucosal surfaces of the LIP; oral cavity; PHARYNX; LARYNX; and cervical esophagus. Other sites included are the NOSE and PARANASAL SINUSES; SALIVARY GLANDS; THYROID GLAND and PARATHYROID GLANDS; and MELANOMA and non-melanoma skin cancers of the head and neck. (from Holland et al., Cancer Medicine, 4th ed, p1651) Cancer of Head and Neck,Head Cancer,Head Neoplasm,Head and Neck Cancer,Head and Neck Neoplasm,Neck Cancer,Neck Neoplasm,Neck Neoplasms,Neoplasms, Upper Aerodigestive Tract,UADT Neoplasm,Upper Aerodigestive Tract Neoplasm,Upper Aerodigestive Tract Neoplasms,Cancer of Head,Cancer of Neck,Cancer of the Head,Cancer of the Head and Neck,Cancer of the Neck,Head Neoplasms,Head, Neck Neoplasms,Neoplasms, Head,Neoplasms, Head and Neck,Neoplasms, Neck,UADT Neoplasms,Cancer, Head,Cancer, Neck,Cancers, Head,Cancers, Neck,Head Cancers,Neck Cancers,Neoplasm, Head,Neoplasm, Neck,Neoplasm, UADT,Neoplasms, UADT
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D050397 Radiotherapy, Intensity-Modulated CONFORMAL RADIOTHERAPY that combines several intensity-modulated beams to provide improved dose homogeneity and highly conformal dose distributions. Helical Tomotherapy,Intensity-Modulated Arc Therapy,Volumetric-Modulated Arc Therapy,Arc Therapies, Intensity-Modulated,Arc Therapies, Volumetric-Modulated,Arc Therapy, Intensity-Modulated,Arc Therapy, Volumetric-Modulated,Helical Tomotherapies,Intensity Modulated Arc Therapy,Intensity-Modulated Arc Therapies,Intensity-Modulated Radiotherapies,Intensity-Modulated Radiotherapy,Radiotherapies, Intensity-Modulated,Radiotherapy, Intensity Modulated,Therapies, Intensity-Modulated Arc,Therapies, Volumetric-Modulated Arc,Therapy, Intensity-Modulated Arc,Therapy, Volumetric-Modulated Arc,Tomotherapies, Helical,Tomotherapy, Helical,Volumetric Modulated Arc Therapy,Volumetric-Modulated Arc Therapies
D018787 Radiation Oncology A subspecialty of medical oncology and radiology concerned with the radiotherapy of cancer. Oncology, Radiation,Radiology, Therapeutic,Therapeutic Radiology
D020266 Radiotherapy, Conformal A therapy using IONIZING RADIATION where there is improved dose homogeneity within the tumor and reduced dosage to uninvolved structures. The precise shaping of dose distribution is achieved via the use of computer-controlled multileaf collimators. Conformal Radiotherapy,3-D Conformal Radiotherapy,Three-Dimensional Conformal Radiotherapy,3-D Conformal Radiotherapies,Conformal Radiotherapies,Conformal Radiotherapies, 3-D,Conformal Radiotherapies, Three-Dimensional,Conformal Radiotherapy, 3-D,Conformal Radiotherapy, Three-Dimensional,Radiotherapies, 3-D Conformal,Radiotherapies, Conformal,Radiotherapies, Three-Dimensional Conformal,Radiotherapy, 3-D Conformal,Radiotherapy, Three-Dimensional Conformal,Three Dimensional Conformal Radiotherapy,Three-Dimensional Conformal Radiotherapies
D021621 Imaging, Three-Dimensional The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object. Computer-Assisted Three-Dimensional Imaging,Imaging, Three-Dimensional, Computer Assisted,3-D Image,3-D Imaging,Computer-Generated 3D Imaging,Three-Dimensional Image,Three-Dimensional Imaging, Computer Generated,3 D Image,3 D Imaging,3-D Images,3-D Imagings,3D Imaging, Computer-Generated,3D Imagings, Computer-Generated,Computer Assisted Three Dimensional Imaging,Computer Generated 3D Imaging,Computer-Assisted Three-Dimensional Imagings,Computer-Generated 3D Imagings,Image, 3-D,Image, Three-Dimensional,Images, 3-D,Images, Three-Dimensional,Imaging, 3-D,Imaging, Computer-Assisted Three-Dimensional,Imaging, Computer-Generated 3D,Imaging, Three Dimensional,Imagings, 3-D,Imagings, Computer-Assisted Three-Dimensional,Imagings, Computer-Generated 3D,Imagings, Three-Dimensional,Three Dimensional Image,Three Dimensional Imaging, Computer Generated,Three-Dimensional Images,Three-Dimensional Imaging,Three-Dimensional Imaging, Computer-Assisted,Three-Dimensional Imagings,Three-Dimensional Imagings, Computer-Assisted

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