Radiation dose-effect relations and local recovery in perfusion for patients with non-small-cell lung cancer

Yvette Seppenwoolde, Sara H. Muller, Jacqueline C.M. Theuws, Paul Baas, José S.A. Belderbos, Liesbeth J. Boersma, Joos V. Lebesque*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

107 Citations (Scopus)
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Abstract

Purpose: To determine local dose-effect relations for lung perfusion and density changes due to irradiation for patients with non-small-cell lung cancer (NSCLC) and to quantify the effect of reperfusion. Methods and Materials: For 25 NSCLC patients and a reference group of 81 patients with healthy lungs, registered single photon emission computed tomography (SPECT) lung perfusion and CT scans were made, before and after radiotherapy. Average dose-effect relations for perfusion and CT-density changes were calculated and compared with the dose-effect relation of the reference group. On the basis of these dose-effect relations, the post-RT perfusion was predicted for each patient and compared to the measured post-RT perfusion. Results: Well- perfused lung regions of the NSCLC patients showed the same dose-effect relation as the reference patients. By comparing predicted and measured post- treatment perfusion scans, regions of reperfusion could be determined for 18 of 25 NSCLC patients but for none of the reference patients. Conclusion: Well-perfused lung tissue of patients with NSCLC behaves like healthy lung tissue with respect to radiation. The dose-effect relation for perfusion and CT density was extended for doses up to 80 Gy. Radiation damage in poorly perfused lung regions was less than predicted as a consequence of local reperfusion.

Original languageEnglish
Pages (from-to)681-690
Number of pages10
JournalInternational Journal of Radiation Oncology Biology Physics
Volume47
Issue number3
DOIs
Publication statusPublished - 1 Jun 2000
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the Dutch Cancer Society (Grant 99-2043).

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