JP4777130B2 - 固定陽極型のx線管における実効焦点を見かけ上小さくする方法 - Google Patents
固定陽極型のx線管における実効焦点を見かけ上小さくする方法 Download PDFInfo
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- JP4777130B2 JP4777130B2 JP2006123114A JP2006123114A JP4777130B2 JP 4777130 B2 JP4777130 B2 JP 4777130B2 JP 2006123114 A JP2006123114 A JP 2006123114A JP 2006123114 A JP2006123114 A JP 2006123114A JP 4777130 B2 JP4777130 B2 JP 4777130B2
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- 238000000034 method Methods 0.000 title claims description 13
- 238000003384 imaging method Methods 0.000 claims description 9
- 238000010894 electron beam technology Methods 0.000 claims description 5
- 230000004304 visual acuity Effects 0.000 description 8
- 230000003902 lesion Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
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- -1 aluminum and copper Chemical class 0.000 description 1
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- 239000010949 copper Substances 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
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- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 239000000057 synthetic resin Substances 0.000 description 1
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Description
従って、陽極の角度が小さくなればなるほど実効焦点サイズの1辺を小さくすることができる。しかし、ここで、陽極の角度が小さくなればなるほど撮影に必要とされる照射野内での線量の不均一が発生する。これはヒールエフェクトと称され、増感紙フイルム系を用いて撮影が行なわれる場合には問題となる。
2 陽極
3 陽極の陰極のフィラメントとの対向面
4 ターゲット
5 管軸
6 中心X線
10 X線管
Claims (1)
- X線管(10)に固定された陰極のフィラメント(1)に対して、これから或る距離離間して陽極(2)を配置し、そのフィラメント(1)との対向面(3)を前記フィラメント(1)のコイル接線に対して所定角度αに設定し、この対向面(3)にターゲット(4)を設け、前記陰極のフィラメント(1)から放出された電子ビームeを、前記陽極(2)のターゲット(4)に衝突してX線を放出する固定陽極型のX線管において、X線ヘッドに固定されている固定陽極型のX線管(10)の幾何学的配置を変えるに当たり、X線管(10)の陰極のフィラメント(1)と陽極(2)とを結ぶ線を管軸(5)とすると、焦点の中央を回転中心とし、X線管(10)を中心X線(6)方向から焦点方向を見た時、陰極部を奥に、陽極部を手前方向に一定角度だけ回転させ、回転後の中心X線(6)の照射する方向から見たときのX線管ターゲット(4)の角度を見かけ上小さくすることで、実効焦点サイズを見かけ上小さくし、さらにX線撮影に当たり、照射野内におけるX線強度分布が不均一な場合は、受光装置またはX線発生装置にX線強度分布補正手段を設けるようにしたことを特徴とする固定陽極型のX線管における実効焦点を見かけ上小さくする方法。
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JP2006123114A JP4777130B2 (ja) | 2006-04-27 | 2006-04-27 | 固定陽極型のx線管における実効焦点を見かけ上小さくする方法 |
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JP2006123114A JP4777130B2 (ja) | 2006-04-27 | 2006-04-27 | 固定陽極型のx線管における実効焦点を見かけ上小さくする方法 |
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JP2007289550A JP2007289550A (ja) | 2007-11-08 |
JP4777130B2 true JP4777130B2 (ja) | 2011-09-21 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022092017A1 (ja) | 2020-11-02 | 2022-05-05 | 株式会社モリタ製作所 | X線撮影装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5744573B2 (ja) * | 2010-03-12 | 2015-07-08 | 株式会社モリタ製作所 | X線撮影装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6251199A (ja) * | 1985-08-29 | 1987-03-05 | Yokogawa Medical Syst Ltd | 可変焦点型x線断層撮像装置 |
JPH04231941A (ja) * | 1990-12-28 | 1992-08-20 | Shimadzu Corp | 回転陰極x線管 |
JPH07161319A (ja) * | 1993-12-07 | 1995-06-23 | Toshiba Corp | X線管装置 |
JP2001198119A (ja) * | 2000-01-24 | 2001-07-24 | Hitachi Medical Corp | X線ct装置 |
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- 2006-04-27 JP JP2006123114A patent/JP4777130B2/ja active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022092017A1 (ja) | 2020-11-02 | 2022-05-05 | 株式会社モリタ製作所 | X線撮影装置 |
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