A method for MRI guidance of intercostal high intensity focused ultrasound ablation in the liver.
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| Title: | A method for MRI guidance of intercostal high intensity focused ultrasound ablation in the liver. |
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| Authors: | Quesson, Bruno1 b.quesson@imf.u-bordeaux2.fr, Merle, Mathilde1, Köhler, Max O.2, Mougenot, Charles3, Roujol, Sebastien1, de Senneville, Baudouin Denis1, Moonen, Chrit T.1 |
| Source: | Medical Physics. Jun2010, Vol. 37 Issue 6, p2533-2540. 8p. 1 Color Photograph, 1 Diagram, 1 Chart, 3 Graphs. |
| Subjects: | Liver tumors, Ultrasonic imaging, Medical imaging systems, Bones, Magnetic resonance |
| Abstract: | Purpose: High intensity focused ultrasound (HIFU) is a promising method for the noninvasive treatment of liver tumors. However, the presence of ribs in the HIFU beam path remains problematic since it may lead to adverse effects (skin burns) by absorption and reflection of the incident beam at or near the bone surface. This article presents a method based on magnetic resonance (MR) imaging for identification of the ribs in the HIFU beam, and for selection of the transducer elements to deactivate. Methods: The ribs are visualized on anatomical images acquired prior to heating and manually segmented. The resulting regions of interest surrounding the ribs are projected onto the transducer surface by ray tracing from the focal point. The transducer elements in the “shadow” of the ribs are then deactivated. The method was validated ex vivo and in vivo in pig liver during breathing under multislice real-time MR thermometry, using the proton resonance frequency shift method. Results: Ex vivo and in vivo temperature data showed that the temperature increase near the ribs was substantial when HIFU sonications were performed with all elements active, whereas the temperature was reduced with deactivation of the transducer elements located in front of the ribs. The temperature at the focal point was similar with and without deactivation of the transducer elements, indicative of no loss of heat efficiency with the proposed technique. Conclusions: This method is simple, rapid, and reliable, and enables intercostal HIFU ablation while sparing ribs and their surrounding tissues. [ABSTRACT FROM AUTHOR] |
| Copyright of Medical Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 51177819 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A method for MRI guidance of intercostal high intensity focused ultrasound ablation in the liver. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Quesson%2C+Bruno%22">Quesson, Bruno</searchLink><relatesTo>1</relatesTo><i> b.quesson@imf.u-bordeaux2.fr</i><br /><searchLink fieldCode="AR" term="%22Merle%2C+Mathilde%22">Merle, Mathilde</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Köhler%2C+Max+O%2E%22">Köhler, Max O.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Mougenot%2C+Charles%22">Mougenot, Charles</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Roujol%2C+Sebastien%22">Roujol, Sebastien</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22de+Senneville%2C+Baudouin+Denis%22">de Senneville, Baudouin Denis</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Moonen%2C+Chrit+T%2E%22">Moonen, Chrit T.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Medical+Physics%22">Medical Physics</searchLink>. Jun2010, Vol. 37 Issue 6, p2533-2540. 8p. 1 Color Photograph, 1 Diagram, 1 Chart, 3 Graphs. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Liver+tumors%22">Liver tumors</searchLink><br /><searchLink fieldCode="DE" term="%22Ultrasonic+imaging%22">Ultrasonic imaging</searchLink><br /><searchLink fieldCode="DE" term="%22Medical+imaging+systems%22">Medical imaging systems</searchLink><br /><searchLink fieldCode="DE" term="%22Bones%22">Bones</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+resonance%22">Magnetic resonance</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Purpose: High intensity focused ultrasound (HIFU) is a promising method for the noninvasive treatment of liver tumors. However, the presence of ribs in the HIFU beam path remains problematic since it may lead to adverse effects (skin burns) by absorption and reflection of the incident beam at or near the bone surface. This article presents a method based on magnetic resonance (MR) imaging for identification of the ribs in the HIFU beam, and for selection of the transducer elements to deactivate. Methods: The ribs are visualized on anatomical images acquired prior to heating and manually segmented. The resulting regions of interest surrounding the ribs are projected onto the transducer surface by ray tracing from the focal point. The transducer elements in the “shadow” of the ribs are then deactivated. The method was validated ex vivo and in vivo in pig liver during breathing under multislice real-time MR thermometry, using the proton resonance frequency shift method. Results: Ex vivo and in vivo temperature data showed that the temperature increase near the ribs was substantial when HIFU sonications were performed with all elements active, whereas the temperature was reduced with deactivation of the transducer elements located in front of the ribs. The temperature at the focal point was similar with and without deactivation of the transducer elements, indicative of no loss of heat efficiency with the proposed technique. Conclusions: This method is simple, rapid, and reliable, and enables intercostal HIFU ablation while sparing ribs and their surrounding tissues. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Medical Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1118/1.3413996 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 2533 Subjects: – SubjectFull: Liver tumors Type: general – SubjectFull: Ultrasonic imaging Type: general – SubjectFull: Medical imaging systems Type: general – SubjectFull: Bones Type: general – SubjectFull: Magnetic resonance Type: general Titles: – TitleFull: A method for MRI guidance of intercostal high intensity focused ultrasound ablation in the liver. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Quesson, Bruno – PersonEntity: Name: NameFull: Merle, Mathilde – PersonEntity: Name: NameFull: Köhler, Max O. – PersonEntity: Name: NameFull: Mougenot, Charles – PersonEntity: Name: NameFull: Roujol, Sebastien – PersonEntity: Name: NameFull: de Senneville, Baudouin Denis – PersonEntity: Name: NameFull: Moonen, Chrit T. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2010 Type: published Y: 2010 Identifiers: – Type: issn-print Value: 00942405 Numbering: – Type: volume Value: 37 – Type: issue Value: 6 Titles: – TitleFull: Medical Physics Type: main |
| ResultId | 1 |
