| A combined pharmacokinetic and radiologic assessment of dynamic contrast-enhanced magnetic resonance imaging predicts response to chemoradiation in locally advanced cervical cancer. | |
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MedLine Citation:
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PMID: 19735887 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To investigate the combination of pharmacokinetic and radiologic assessment of dynamic contrast-enhanced magnetic resonance imaging (MRI) as an early response indicator in women receiving chemoradiation for advanced cervical cancer. METHODS AND MATERIALS: Twenty women with locally advanced cervical cancer were included in a prospective cohort study. Dynamic contrast-enhanced MRI was carried out before chemoradiation, after 2 weeks of therapy, and at the conclusion of therapy using a 1.5-T MRI scanner. Radiologic assessment of uptake parameters was obtained from resultant intensity curves. Pharmacokinetic analysis using a multicompartment model was also performed. General linear modeling was used to combine radiologic and pharmacokinetic parameters and correlated with eventual response as determined by change in MRI tumor size and conventional clinical response. A subgroup of 11 women underwent repeat pretherapy MRI to test pharmacokinetic reproducibility. RESULTS: Pretherapy radiologic parameters and pharmacokinetic K(trans) correlated with response (p < 0.01). General linear modeling demonstrated that a combination of radiologic and pharmacokinetic assessments before therapy was able to predict more than 88% of variance of response. Reproducibility of pharmacokinetic modeling was confirmed. CONCLUSIONS: A combination of radiologic assessment with pharmacokinetic modeling applied to dynamic MRI before the start of chemoradiation improves the predictive power of either by more than 20%. The potential improvements in therapy response prediction using this type of combined analysis of dynamic contrast-enhanced MRI may aid in the development of more individualized, effective therapy regimens for this patient group. |
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Authors:
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Scott I K Semple; Vanessa N Harry; David E Parkin; Fiona J Gilbert |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: International journal of radiation oncology, biology, physics Volume: 75 ISSN: 1879-355X ISO Abbreviation: Int. J. Radiat. Oncol. Biol. Phys. Publication Date: 2009 Oct |
Date Detail:
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Created Date: 2009-09-08 Completed Date: 2009-09-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7603616 Medline TA: Int J Radiat Oncol Biol Phys Country: United States |
Other Details:
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Languages: eng Pagination: 611-7 Citation Subset: IM |
Affiliation:
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Brain Imaging Research Centre, University of Edinburgh, Edinburgh, United Kingdom. scott.semple@ed.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adenocarcinoma
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drug therapy,
metabolism,
pathology,
radiotherapy Adult Aged Aged, 80 and over Carcinoma, Squamous Cell / drug therapy, metabolism, pathology, radiotherapy Combined Modality Therapy / methods Contrast Media / diagnostic use, pharmacokinetics* Female Humans Image Enhancement / methods* Linear Models Magnetic Resonance Imaging / methods* Middle Aged Prospective Studies Treatment Outcome Uterine Cervical Neoplasms* / drug therapy, metabolism, pathology, radiotherapy |
| Chemical | |
Reg. No./Substance:
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0/Contrast Media |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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