Measurement of needle susceptibility artifacts in magnetic resonance images
The success of minimally invasive procedures under MR-guidance can be increased by the knowledge of the current needle pose. We hypothesize that a one-toone mapping exists between the needle orientation with respect to the static magnetic field and the cross-sectional shape of the needle’s susceptib...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2015-09-01
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| Series: | Current Directions in Biomedical Engineering |
| Subjects: | |
| Online Access: | http://www.degruyter.com/view/j/cdbme.2015.1.issue-1/cdbme-2015-0050/cdbme-2015-0050.xml?format=INT |
| _version_ | 1818267104571293696 |
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| author | Schmitt Sebastian Skopnik Katharina Overhoff Heinrich Martin |
| author_facet | Schmitt Sebastian Skopnik Katharina Overhoff Heinrich Martin |
| author_sort | Schmitt Sebastian |
| collection | DOAJ |
| description | The success of minimally invasive procedures under MR-guidance can be increased by the knowledge of the current needle pose. We hypothesize that a one-toone mapping exists between the needle orientation with respect to the static magnetic field and the cross-sectional shape of the needle’s susceptibility artifact. For this purpose, we derived a mathematical model, which describes the cross sectional geometry of the needle artifact. It is approximated by two ellipses. Certain parameters of these ellipses can be utilized for mapping the geometry of the needle artifact onto the needle orientation. The relation between the two ellipse parameters α (inclination of the semi-major axis) and b (length of the semi-minor axis) and the needle’s azimuth angle can be approximated by linear regression in a certain angle interval. A combination of these two ellipse parameters is suitable for estimating the needle’s azimuth angle within a range between 0° and 60°. |
| first_indexed | 2024-12-12T20:17:17Z |
| format | Article |
| id | doaj.art-b31c60673c144846a5f3f3e07f02a0e7 |
| institution | Directory Open Access Journal |
| issn | 2364-5504 |
| language | English |
| last_indexed | 2024-12-12T20:17:17Z |
| publishDate | 2015-09-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Current Directions in Biomedical Engineering |
| spelling | doaj.art-b31c60673c144846a5f3f3e07f02a0e72022-12-22T00:13:21ZengDe GruyterCurrent Directions in Biomedical Engineering2364-55042015-09-011119820010.1515/cdbme-2015-0050cdbme-2015-0050Measurement of needle susceptibility artifacts in magnetic resonance imagesSchmitt Sebastian0Skopnik Katharina1Overhoff Heinrich Martin2Westfälische Hochschule, Neidenburger Str. 43 45877 GelsenkirchenMR:comp GmbH, Buschgrundstr. 33 45894 GelsenkirchenWestfälische Hochschule, Neidenburger Str. 43 45877 GelsenkirchenThe success of minimally invasive procedures under MR-guidance can be increased by the knowledge of the current needle pose. We hypothesize that a one-toone mapping exists between the needle orientation with respect to the static magnetic field and the cross-sectional shape of the needle’s susceptibility artifact. For this purpose, we derived a mathematical model, which describes the cross sectional geometry of the needle artifact. It is approximated by two ellipses. Certain parameters of these ellipses can be utilized for mapping the geometry of the needle artifact onto the needle orientation. The relation between the two ellipse parameters α (inclination of the semi-major axis) and b (length of the semi-minor axis) and the needle’s azimuth angle can be approximated by linear regression in a certain angle interval. A combination of these two ellipse parameters is suitable for estimating the needle’s azimuth angle within a range between 0° and 60°.http://www.degruyter.com/view/j/cdbme.2015.1.issue-1/cdbme-2015-0050/cdbme-2015-0050.xml?format=INTMagnetic Resonance ImagingSusceptibility Artifact Measurement |
| spellingShingle | Schmitt Sebastian Skopnik Katharina Overhoff Heinrich Martin Measurement of needle susceptibility artifacts in magnetic resonance images Current Directions in Biomedical Engineering Magnetic Resonance Imaging Susceptibility Artifact Measurement |
| title | Measurement of needle susceptibility artifacts in magnetic resonance images |
| title_full | Measurement of needle susceptibility artifacts in magnetic resonance images |
| title_fullStr | Measurement of needle susceptibility artifacts in magnetic resonance images |
| title_full_unstemmed | Measurement of needle susceptibility artifacts in magnetic resonance images |
| title_short | Measurement of needle susceptibility artifacts in magnetic resonance images |
| title_sort | measurement of needle susceptibility artifacts in magnetic resonance images |
| topic | Magnetic Resonance Imaging Susceptibility Artifact Measurement |
| url | http://www.degruyter.com/view/j/cdbme.2015.1.issue-1/cdbme-2015-0050/cdbme-2015-0050.xml?format=INT |
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