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Treatment Margin Assessment using Mega-Voltage Computed Tomography of a Tomotherapy Unit in the Radiotherapy of a Liver Tumor
DC Field | Value | Language |
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dc.contributor.author | 이익재 | - |
dc.contributor.author | 금웅섭 | - |
dc.contributor.author | 성진실 | - |
dc.date.accessioned | 2015-05-19T17:37:48Z | - |
dc.date.available | 2015-05-19T17:37:48Z | - |
dc.date.issued | 2008 | - |
dc.identifier.issn | 1229-8719 | - |
dc.identifier.uri | https://ir.ymlib.yonsei.ac.kr/handle/22282913/108513 | - |
dc.description.abstract | Purpose To identify the inter-fractional shift pattern and to assess an adequate treatment margin in the radiotherapy of a liver tumor using mega-voltage computed tomography (MVCT) of a tomotherapy unit. Materials and Methods Twenty-six patients were treated for liver tumors by tomotherapy from April 2006 to August 2007. The MVCT images of each patient were analyzed from the 1st to the 10th fraction for the assessment of the daily liver shift by four groups based on Couinard's proposal. Daily setup errors were corrected by bony landmarks as a prerequisite. Subsequently, the anterior-, posterior-, right-, and left shifts of the liver edges were measured by maximum linear discrepancies between the kilo-voltage computed tomography (KVCT) image and MVCT image. All data were set in the 2-dimensional right angle coordinate system of the transverse section of each patient's body. Results The liver boundary shift had different patterns for each group. In group II (segment 2, 3, and 4), the anterior mean shift was 2.80±1.73 mm outwards, while the left mean shift was 2.23±1.37 mm inwards. In group IV (segment 7 and 8), the anterior-, posterior-, right-, and left mean shifts were 0.15±3.93 mm inwards, 3.15±6.58 mm inwards, 0.60±3.58 mm inwards, and 4.50±5.35 mm inwards, respectively. The reduced volume in group II after MVCT reassessment might be a consequence of stomach toxicity. Conclusion Inter-fractional liver shifts of each group based on Couinard's proposal were somewhat systematic despite certain variations observed in each patient. The geometrical deformation of the liver by respiratory movement can cause shrinkage in the left margins of liver. We recommend a more sophisticated approach in free-breathing mode when irradiating the left lobe of liver in order to avoid stomach toxicity. | - |
dc.description.statementOfResponsibility | open | - |
dc.format.extent | 280~288 | - |
dc.language | Korean | - |
dc.publisher | 대한방사선종양학회 | - |
dc.relation.isPartOf | Journal of the Korean Society for Therapeutic Radiology and Oncology | - |
dc.rights | CC BY-NC-ND 2.0 KR | - |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/2.0/kr/ | - |
dc.title | Treatment Margin Assessment using Mega-Voltage Computed Tomography of a Tomotherapy Unit in the Radiotherapy of a Liver Tumor | - |
dc.title.alternative | 간종양 방사선치료 시 토모테라피 메가볼트 CT를 이용한 치료 여백 평가 | - |
dc.type | Article | - |
dc.contributor.college | College of Medicine (의과대학) | - |
dc.contributor.department | Dept. of Radiation Oncology (방사선종양학) | - |
dc.contributor.googleauthor | Sei Hwan You | - |
dc.contributor.googleauthor | Jinsil Seong | - |
dc.contributor.googleauthor | Ik Jae Lee | - |
dc.contributor.googleauthor | Woong Sub Koom | - |
dc.contributor.googleauthor | Byeong Chul Jeon | - |
dc.identifier.doi | 10.3857/jkstro.2008.26.4.280 | - |
dc.admin.author | false | - |
dc.admin.mapping | false | - |
dc.contributor.localId | A03055 | - |
dc.contributor.localId | A00273 | - |
dc.contributor.localId | A01956 | - |
dc.relation.journalcode | J01857 | - |
dc.identifier.pmid | MVCT; Liver tumor; Tomotherapy | - |
dc.subject.keyword | MVCT | - |
dc.subject.keyword | Liver tumor | - |
dc.subject.keyword | Tomotherapy | - |
dc.contributor.alternativeName | Lee, Ik Jae | - |
dc.contributor.alternativeName | Koom, Woong Sub | - |
dc.contributor.alternativeName | Seong, Jin Sil | - |
dc.contributor.affiliatedAuthor | Lee, Ik Jae | - |
dc.contributor.affiliatedAuthor | Koom, Woong Sub | - |
dc.contributor.affiliatedAuthor | Seong, Jin Sil | - |
dc.rights.accessRights | free | - |
dc.citation.volume | 26 | - |
dc.citation.number | 4 | - |
dc.citation.startPage | 280 | - |
dc.citation.endPage | 288 | - |
dc.identifier.bibliographicCitation | Journal of the Korean Society for Therapeutic Radiology and Oncology, Vol.26(4) : 280-288, 2008 | - |
dc.identifier.rimsid | 37046 | - |
dc.type.rims | ART | - |
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