Author Nakagiri, Yoshitada| Miyake, Hideaki| Sugita, Katsuhiko| Mikami, Yasutaka| Inamura, Keiji| Mimura, Seiichi| Ohkawa, Yoshihiro| Takeda, Yoshihiro| Hiraki, Yoshio| Fujiki, Tomokazu| Kishi, Kanji| Chihara, Naoto|
Published Date 1990-10
Publication Title 岡山医学会雑誌
Volume volume102
Issue issue9-10
Content Type Journal Article
JaLCDOI 10.18926/11820
Title Alternative Photon background caused by the reduction of the electron beam energy - Materials of scattering foil -
FullText URL 003_013_018.pdf
Author Nakagiri, Yoshitada| Mimura, Seiiti| Inamura, Keiji| Tahara, Seiji| Miyake, Hideaki| Azuma, Yoshiharu| Egusa, Tomomi| Mikami, Yasutaka| Hiraki, Yoshio| Yamada, Toshiharu| Sugita, Katsuhiko|
Abstract The total skin electron beam therapy has been one of the clinical treatment for peripherally T-cell lymphoma; Mycosis fungoides, adult T-cell lymphoma, and so on. The crucial points in this treatment are not only having an optimum energy level of electron beam for a target volume (a tissue) but also keeping the photon back ground low. It is not easy to regulate those points by the control panel, however, for the equipment that is conventinally used for electron beam, theoretically, is to exchange lead (Pb), which is ordinarily used, to a low atomic number material as a scattering foil. We examined several different kinds and / or various thickness as a scattering foil material that can make the electron beam lower without an increase of the contaminant as X-ray. We hereby reported the results, and strongly suggested the following two materials in use; acrylic plate, carbon board, and so on, which are easily available and worked, would be practically useful for the total skin electron beam therapy.
Keywords 電子線エネルギー X線混入率 電子線全身照射法 スキャタリングホイル
Publication Title 岡山大学医療技術短期大学部紀要
Published Date 1993-01-31
Volume volume3
Start Page 13
End Page 18
ISSN 0917-4494
language 日本語
File Version publisher
NAID 120002313375
JaLCDOI 10.18926/11805
Title Alternative Dose Distributions at Standard Diagnostic X-Ray Energy
FullText URL 002_063_071.pdf
Author Miyake, Hideaki| Inamura, Keiji| Nakagiri, Yoshitada| Kadohisa, Shigefumi| Mikami, Yasutaka| Azuma, Yoshiharu| Yamada, Toshiharu| Sugita, Katsuhiko| Hiraki, Yoshio|
Abstract Exposure dose has been indicated by surface dose or transit dose, but they could not indicate dose distributions inside the body. Modulex as the radiation therapy planning system was used for dose distributions at standard diagnostic X-ray energy. X-ray is low energy X-ray at standard diagnostic radiography, so alterations of the energy and the scattering dose distribution by absorbers are quite different from those at high energy X-rays. Mix-DP was put to the homogeneous tissue use, then Bone equivalent phantom or Lung equivalent phanton was put to the inhomogeneous tissue use. Density correction factors for inhomogeneous phantoms were gotten by the calculation of the water equivalent thickness. In Bone the inhomogeneous correction depended strongly on the bone thickness. In Lung it was in need of one density correction factor and the scattering correction method for the decrease of the back scattering. The calculated dose distributions by Modulex agreed with measured data when each correction was carried out, and it was indicated that those data apply to inclinical situations.
Keywords Exposure Dose Dose Distribution Radiation Therapy Planning System Density Correction Scattering Correction
Publication Title 岡山大学医療技術短期大学部紀要
Published Date 1992-02-05
Volume volume2
Start Page 63
End Page 71
ISSN 0917-4494
language 日本語
File Version publisher
NAID 120002313328
JaLCDOI 10.18926/11750
Title Alternative Total Skin Electron Beam Therapy
FullText URL 001_001_006.pdf
Author Nakagiri, Yoshitada| Inamura, Keiji| Miyake, Hideaki| Tahara, Seiji| Mimura, Seiichi| Egusa, Tomomi| Mikami, Yasutaka| Yamada, Toshiharu| Sugita, Katsuhiko| Hiraki, Yoshio|
Abstract The peripherally T-cell lymphoma; Mycosis fungoides etc, has the good radiation sensitivity, and has been adapted for total skin electron beam therapy. In this study the pendular irradiation method was used for the purpose of total skin electron beam therapy in Mycosis fungoides, and physical data on the radiation field and the electron beam energy were useful clinically.
Abstract Alternative 皮膚に限局した一連の末梢型T細胞リンパ腫は放射線に対する感受性が高く、電子線治療の適応となる疾患である。こららの疾患は一般的に全身の皮膚に浸潤するため、治療に際してはTarget Volumeの深さに合わせた最小限のエネルギーで全身隈なく照射する必要がある。筆者等は最近臨床で遭遇した菌状息肉症の患者を治療するため、その患者に合った物理的なデータを測定した。照射野の拡大には振子照射法を用い、エネルギー低減方法は装置に装備されている鉛のスキャタラーを低原子番号で、しかも加工のしやすい塩化Vinyl板に交換する方法を工夫した。データとして治療効果、副作用に関係する線量率、エネルギー、及び照射野内平坦度について測定した結果、距離が長くなる関係から線量率が低下する全身照射法の欠点は解消できなかったが、エネルギー及び平坦度については使用可能なデータを得ることができた。
Keywords 電子線全身照射法 菌状息肉症 全身性皮膚疾患
Publication Title 岡山大学医療技術短期大学部紀要
Published Date 1991-03-25
Volume volume1
Start Page 1
End Page 6
ISSN 0917-4494
language 日本語
File Version publisher
NAID 120002313887