Linked Life Data

12576928

Source:http://linkedlifedata.com/resource/pubmed/id/12576928

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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2003-2-10
pubmed:abstractText
The purpose of this study was to determine whether the use of tomotherapy in the treatment of non-small-cell lung cancer (NSCLC) has the potential to reduce radiation dose to normal tissues, in particular, the lungs, esophagus, and spinal cord, as compared with standard radiotherapy. Five patients with anatomically or physiologically inoperable stage III NSCLC were studied, representing a variety of tumor sizes and locations. For each patient, two treatment plans were generated. One was developed using conventional field arrangements (CFA), and the other for tomotherapy. Using dose-volume histogram reduction techniques, including mean normalized dose (NTDmean), V20, and effective uniform dose (EUD), the normal tissue doses for CFA and tomotherapy plans for a given fixed tumor dose were compared. In addition, the maximum tumor doses possible for a given level of mean normalized lung dose were computed and compared for the CFA and tomotherapy plans. The gross tumor volumes in the five patients studied ranged from 13.5 to 87.1 cm. The tumor dose distributions, determined by EUD and minimum dose, were similar for both CFA and tomotherapy plans, as intended. In all cases, the NTDmean of both lungs was significantly reduced using tomotherapy planning (range: 10-53% reduction, mean: 31%). The volume of lung receiving more than 20 Gy was also reduced in all cases using tomotherapy (range: 17-37% reduction, mean: 22%). For a constant lung NTDmean, it is shown that it should be possible to increase tumor dose to up to 160 Gy in certain patients with tomotherapy. The dose to the spinal cord and esophagus was also reduced in all cases with tomotherapy planning, compared with plans generated using conventional field arrangements. Both tomotherapy, and to a lesser extent conventional three-dimensional conformal radiotherapy, have the potential to significantly decrease radiation dose to lung and other normal structures in the treatment of NSCLC. This has important implications for dose escalation strategies in the future.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0277-3732
pubmed:author
pubmed:issnType
Print
pubmed:volume
26
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
70-8
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
Reduction in radiation dose to lung and other normal tissues using helical tomotherapy to treat lung cancer, in comparison to conventional field arrangements.
pubmed:affiliation
Department of Human Oncology, University of Wisconsin, Madison, Wisconsin 53792, USA.
pubmed:publicationType
Journal Article