Dosimetry study of 18F-FMISO + PET/CT hypoxia imaging guidance on intensity-modulated radiation therapy for non-small cell lung cancer

  • H. Li
  • D. Xu
  • X. Han
  • Q. Ruan
  • X. Zhang
  • Y. Mi
  • M. Dong
  • S. Guo
  • Y. Lin
  • B. Wang
  • G. Li
Research Article
  • 37 Downloads

Abstract

Objectives

This study was to evaluate the feasibility of simultaneous integrated boost on tumor hypoxia area by studying the dosimetric change of hypoxia imaging guidance on intensity-modulated radiation therapy for non-small cell lung cancer (NSCLC).

Methods

Five NSCLC patients with large hypoxic volume participated in this study. FDG PET/CT images were fused with CT localization images to delineate gross tumor volume. FMISO PET/CT images were fused with CT localization images to delineate hypoxic biological target volume (BTV) (tissue maximum ratio ≥ 1.3) by threshold. BTV was irradiated with 72, 78 and 84 Gy, respectively, 30 times. The dosimetry differences were compared in target volume and organ at risk between simultaneous integrated boost plans and conventional radiotherapy plans.

Results

Dosages on BTV of NSCLC hypoxic area were increased to 72, 78 and 84 Gy, respectively, by simultaneous integrated boost intensity-modulated radiation therapy. There was no obvious difference in dosage distributions on original target volume compared with those in conventional radiotherapy. Dosages on main organ at risk in chest met the dosimetric constraint, and there was no significant difference compared with those in conventional radiotherapy.

Conclusion

It is feasible in dosiology that the dosages in NSCLC hypoxic area were added to 72, 78 and 84 Gy by simultaneous integrated boost with the guidance of 18F-FMISO PET/CT.

Keywords

Lung cancer Hypoxia PET Radiotherapy Simultaneous integrated boost FMISO 

Notes

Funding

This study was supported by Henan Provincial Department of Science, China, 142102310052.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of The First Affiliated Hospital of Zhengzhou University.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Copyright information

© Federación de Sociedades Españolas de Oncología (FESEO) 2018

Authors and Affiliations

  1. 1.Radiotherapy DepartmentThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
  2. 2.Nuclear Medicine DepartmentThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
  3. 3.Radiotherapy DepartmentZhengzhou Central HospitalZhengzhouChina

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