JP6395738B2 - Mri安全装置手段 - Google Patents
Mri安全装置手段 Download PDFInfo
- Publication number
- JP6395738B2 JP6395738B2 JP2015562550A JP2015562550A JP6395738B2 JP 6395738 B2 JP6395738 B2 JP 6395738B2 JP 2015562550 A JP2015562550 A JP 2015562550A JP 2015562550 A JP2015562550 A JP 2015562550A JP 6395738 B2 JP6395738 B2 JP 6395738B2
- Authority
- JP
- Japan
- Prior art keywords
- msm
- mrd
- opening
- magnetic field
- gate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/288—Provisions within MR facilities for enhancing safety during MR, e.g. reduction of the specific absorption rate [SAR], detection of ferromagnetic objects in the scanner room
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/30—Sample handling arrangements, e.g. sample cells, spinning mechanisms
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
Description
101 MSM(磁気遮蔽機構)の磁気強度
102 開口、開口部
103 関心体積
104 最大印可磁場
105 フリンジング磁場
106 MRDの周囲の外部環境
107 フリンジング磁場、ゼロ磁場
110 MRD(MRI装置)
200 MSM(磁気遮蔽機構)
200a、200b、200c MSM位置付け場所
201 上側の磁石
202 下側の磁石
300、300A、300D ガントリー
300B ガントリー周囲の磁性リム
300C ガントリーの非磁性部分
400 ゲート
B 磁場
L 開口からの距離
Claims (16)
- 金属製物体が磁気共鳴装置(MRD、110)の磁場によって引き寄せられて当該MRDの開口(102)を通り開放ボア(103)に向かって侵入するのを回避するために前記MRD(110)と組み合わせて使用するための磁気遮蔽機構(MSM、200)であって、前記MSM(200)が前記MRD(110)の外に前記MRDの開口(102)から距離Lに付着されている少なくとも1つの磁石を備えていることを特徴とするMSMにおいて、前記少なくとも1つの磁石(200)によって生成される磁場(BMSM)の強度は、金属製物体が前記MRD(110)の前記開放ボア(103)の中へ引き寄せられてゆくのではなしに前記MSM(200)に向かって引かれることになるように、前記距離Lでの前記MRD(110)によって生成されるフリンジング磁場(BF/L)の強度より大きくなるように選択されている、MSM。
- 前記MSMは、前記開口を少なくとも部分的に取り囲むリムとして構成されている、請求項1に記載のMSM。
- 前記MSMは、前記リムの円周の少なくとも一部に沿って配置されている複数の磁石のアレイを備えている、請求項2に記載のMSM。
- 前記MSMは、前記開放ボアの主長手方向軸に沿って可逆的に往復動するように構成されている、請求項1に記載のMSM。
- 前記MRDとの通信手段を更に備えている請求項1に記載のMSM。
- 前記MSMは、ゲートと、前記MRDと通信しているゲート警報機構と、を更に備えており、前記ゲート警報機構は金属製物体が前記ゲートを介して侵入すると起動される、請求項1に記載のMSM。
- 金属探知機と通信するための通信手段をさらに備える、請求項1に記載のMSM。
- 前記MSMは、当該MSMを1つより多い既定場所に位置付けできるように前記MRDの開口に対して可動である、請求項1に記載のMSM。
- 磁気共鳴装置(MRD、110)であって、開放ボア(103)と、開口(102)と、金属製物体が前記MRD(110)の磁場によって引き寄せられて前記開口(102)を通り前記開放ボア(103)に向かって侵入するのを回避するための少なくとも1つの磁気遮蔽機構(MSM、200)と、を備えているMRDにおいて、前記MSM(200)が前記開放ボア(103)の外に前記MRDの開口(102)から距離Lに付着されている少なくとも1つの磁石を備えていることを特徴としており、前記少なくとも1つの磁石によって生成される磁場(BMSM)の強度は、前記金属製物体が前記MRD(110)の前記開放ボア(103)の中へ引き寄せられてゆくのではなしに前記MSM(200)に向かって引かれることになるように、前記距離Lでの前記MRD(110)によって生成されるフリンジング磁場(BF/L)の強度より大きくなるように選択されている、MRD。
- 前記MSMは、前記開口を少なくとも部分的に取り囲むリムとして構成されている、請求項9に記載のMRD。
- 前記MSMは、前記リムの円周の少なくとも一部に沿って配置されている複数の磁石のアレイを備えている、請求項10に記載のMRD。
- 前記MSMは、前記開放ボアの主長手方向軸に沿って可逆的に往復動するように構成されている、請求項9に記載のMRD。
- 請求項9に記載のMRDと、前記MRDと少なくとも1つのMSMの間の通信手段と、を備えているMRDシステム。
- 前記少なくとも1つのMSMは、ゲートと、前記MRDと通信しているゲート警報機構と、を更に備えており、前記ゲート警報機構は金属製物体が前記ゲートを介して侵入すると起動される、請求項13に記載のMRDシステム。
- 前記MSMは金属探知機と通信するための通信手段を備えている、請求項9に記載のMRD。
- 前記MSMは、当該MSMを1つより多い既定場所に位置付けできるように前記MRDの開口に対して可動である、請求項9に記載のMRD。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361778499P | 2013-03-13 | 2013-03-13 | |
US61/778,499 | 2013-03-13 | ||
PCT/IL2014/050245 WO2014141246A1 (en) | 2013-03-13 | 2014-03-11 | Mri safety device means |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2016511051A JP2016511051A (ja) | 2016-04-14 |
JP6395738B2 true JP6395738B2 (ja) | 2018-09-26 |
Family
ID=50693715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2015562550A Active JP6395738B2 (ja) | 2013-03-13 | 2014-03-11 | Mri安全装置手段 |
Country Status (4)
Country | Link |
---|---|
US (2) | US9535141B2 (ja) |
EP (2) | EP2831609B1 (ja) |
JP (1) | JP6395738B2 (ja) |
WO (1) | WO2014141246A1 (ja) |
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-
2013
- 2013-07-11 US US13/939,599 patent/US9535141B2/en active Active
-
2014
- 2014-03-11 EP EP14723487.6A patent/EP2831609B1/en active Active
- 2014-03-11 WO PCT/IL2014/050245 patent/WO2014141246A1/en active Search and Examination
- 2014-03-11 JP JP2015562550A patent/JP6395738B2/ja active Active
- 2014-03-11 EP EP14185708.6A patent/EP2837948A1/en not_active Withdrawn
-
2016
- 2016-12-14 US US15/378,284 patent/US9739852B2/en active Active - Reinstated
Also Published As
Publication number | Publication date |
---|---|
EP2831609B1 (en) | 2016-12-14 |
US9739852B2 (en) | 2017-08-22 |
EP2837948A1 (en) | 2015-02-18 |
US20170089988A1 (en) | 2017-03-30 |
JP2016511051A (ja) | 2016-04-14 |
WO2014141246A1 (en) | 2014-09-18 |
US20140266203A1 (en) | 2014-09-18 |
US9535141B2 (en) | 2017-01-03 |
EP2831609A1 (en) | 2015-02-04 |
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