歯科用コーンビームCTによる患者の臓器・組織線量と実効線量の推定

• 岩井 一男

  日本大学歯学部放射線学教室，総合歯学研究所高度先端医療研究部門

• 西澤 かな枝

  放射線医学総合研究所重粒子医科学センター医学物理部

• 三島 章

  鶴見大学歯学部附属病院画像検査部

• 江島 堅一郎

  日本大学歯学部放射線学教室，総合歯学研究所高度先端医療研究部門

• 橋本 光二

  日本大学歯学部放射線学教室，総合歯学研究所高度先端医療研究部門

• 小林 馨

  鶴見大学歯学部歯科放射線学講座

書誌事項

タイトル別名

• Estimation of Organ or Tissue Dose and the Effective Dose of Patient by Dental Cone Beam X-ray Computed Tomography

抄録

This study estimated the effective dose for dental X-ray computed tomography using Alphard-3030 device from the Asahi Roentgen Ind. Co., Ltd., which allows a wide range scans and a past localized domain scan. Alphard-3030 can perform scans in Dental (D), Implant (I), Panorama (P) and the Cephalo (C) mode. Organ and tissue doses were measured in each of modes, and using the tissue was estimated weighting factor of the ICRP2007 recommendation, the effective dose.<BR>The measuremant assembly used UD-170A (BeO) and UD-110S (CaSO₄: Tm) thermoluminescence dosimeters (TLD) from Panasonic. The calibration of these TLD used a MixDp phantom in the X-ray apparatus YXLON International KK, and irradiated it simulationly with an ionization chamber type associate standard dosimeter from Natl. Inst. of Radiological Sci. and confimation was obtained by comparison. The effective energy was assumed 35.1keV for Alphard-3030 which measured in advance. The Rand woman phantom (Alderson Co.) was used as the phantom for dosimetry. The measured area were brain, thyroid gland, lungs, oesophagus, stomach, large intestine upper part, colon, small intestine, liver, pancreas, spleen, adrenal, kidney, bladder, thymus, breast, ovary, testiculus, red bone marrow, and skin,salivary gland (parotid gland, submandibular gland, sublingual gland) and lens. TLD were arranged over the whole organ to obtain a mean dose as the organ dose. The calculation of the effective dose used tissue-weighting factors for organs and tissues as described in the ICRP recommendation based on the equivalent dose that we measured in 2007. The dose of the remaining tissue and organ of 14 is these average dose as tissue of thymus, adrenal gland, spleen, pancreas, uterus, small intestine.<BR>The effective doses of Alphard-3030 were 197, 219 and 114 μSv in the C, P, the I mode, respectively. In upper central incisor, lower left first molar and left temporomandibular joint region in D mode, the effective doses 24.4, 72.5 and 23.9 μSv, respectively.

収録刊行物

• 歯科放射線

  歯科放射線 48 (4), 68-74, 2008

  特定非営利活動法人 日本歯科放射線学会

キーワード

• 歯科用X線CT
• コーンビームCT
• 臓器・組織線量
• 実効線量

詳細情報

• CRID: 1390001204960927872
• NII論文ID: 130004912387
• DOI: 10.11242/dentalradiology.48.68
• ISSN: 21856311
• ISSN: 03899705
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可