Journal
LUNG CANCER
Volume 75, Issue 1, Pages 73-76Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.lungcan.2011.06.003
Keywords
Intra-tumour heterogeneity; Residual metabolic-activity; Residual disease; Radio-resistance; Lung cancer; PET-CT
Categories
Funding
- Dutch Cancer Society (KWF)
- Siemens MI
Ask authors/readers for more resources
It was recently described that high FDG-uptake areas pre-radiotherapy largely correspond with residual metabolic-active areas post-radiotherapy. Here, an independent prospective validation of these results was performed using an overlap-fraction (OF) calculation of various FOG-uptake based thresholds. Data from twelve patients treated at Radboud University Nijmegen Medical Center with lung cancer were analyzed. All patients underwent two FDG-PET-CT scans, one pre-radiotherapy (pre-RT) and one approximately three months after treatment (post-RT). Of the twelve analyzed patients, eight patients showed residual FDG uptake on the post-RT scan and were included for analysis. One of these patients had a residue that was not clearly distinguishable from the surrounding tissue due to FDG avid inflammation. Therefore, seven patients remained for further analysis. The mean volume of the residual metabolic-active areas post-RT was 14.6 +/- 10.0% (mean +/- SD) of the mean volume of the gross tumour volume (GTV) pre-RT. The residual metabolic-active areas largely corresponded with the pre-RT GTV (OF = 93.7 +/- 7.2%). The pre-RT-scan threshold delineations of 34%, 40% and 50% of the SUVmax had a large OF with the residual region, 86.9 +/- 8.3%, 77.4 +/- 8.1% and 67.9 +/- 6.8%, respectively. In this independent dataset, we confirmed that the location of residual FDG-uptake areas after radiotherapy corresponds with the high FDG-uptake areas pre-radiotherapy. Therefore, a pre-radiotherapy FDG-PET-CT scan can potentially be used for radiotherapy dose redistribution. (C) 2011 Elsevier Ireland Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available