ビームハードニング特性を考慮したエネルギー差分法の検討

URI http://harp.lib.hiroshima-u.ac.jp/hirokoku-u/metadata/6824
File
Title
ビームハードニング特性を考慮したエネルギー差分法の検討
Author
氏名 倉本 卓
ヨミ クラモト タク
別名 Kuramoto Taku
氏名 前田 浩志
ヨミ マエダ コウジ
別名 Maeda Koji
氏名 中原 佑基
ヨミ ナカハラ ユウキ
別名 Nakahara Yuki
氏名 松本 政雄
ヨミ マツモト マサオ
別名 Matsumoto Masao
氏名 上田 善武
ヨミ ウエダ ヨシタケ
別名 Ueda Yoshitake
Subject
energy subtraction method
beam hardening
metal filter
K-absorption edge
x-ray spectru
Abstract

The energy subtraction (ES) method is an image processing technique that depicts a radiograph from which the image of intentionally specified tissue has been eliminated. The ES radiograph is usually obtained by subtraction of two x-ray images taken for two different values of tube voltage, owing to inherent energy dependence of the attenuation coefficient of each tissue. Since white x rays are, generally used in the ES method, the beam hardening occurs during x-ray penetration through a subject, resulting in discrepancies among x-ray absorption ratios even for the same tissue depending on its location in the subject. This brings erroneous information about the attenuation coefficient also in the ES method. Therefore, a new ES method was examined using dual energy x rays with the same beam hardening characteristics. As a result, this ES method suggested the high power to discriminate materials and its usefulness in radiological diagnoses as compared with the usual ES method using white x rays.

Journal Title
医療工学雑誌
Issue
4
Spage
9
Epage
16
Published Date
2010/03/15
Publisher
広島国際大学大学院総合人間科学研究科医療工学専攻
ISSN
1881-9265
NCID
AA12217173
Language
jpn
NIIType
Departmental Bulletin Paper
Text Version
出版社版
Sort Key
2
Old URI
Set
hirokoku-u