Evaluation of delayed changes in pulmonary perfusion scan and pulmonary function tests after radiotherapy for breast cancer

Publish Year: 1403
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_IRJNM-32-1_008

تاریخ نمایه سازی: 8 بهمن 1402

Abstract:

Introduction: The application of radiotherapy after performing surgery plays a vital role in the breast cancer treatment. In the current study, we investigated the effects of the radiotherapy for breast cancer on pulmonary perfusion scan (PPS) and pulmonary function tests (PFTs).Methods: Fifty patients diagnosed with breast cancer with no history of lung diseases who had received radiotherapy after breast surgery and chemotherapy were selected. Mean lung dose (MLD) and volume percentage of the ipsilateral lung receiving a dose equal to or greater than ۲۰ Gy (V۲۰) were calculated for all patients. Quantitative PPS along with SPECT imaging as well as PFTs were performed on each patient before and ۶ to ۹ months after radiotherapy. For Data analysis, independent Samples t-Test and Pearson's correlation coefficient were used.Results: There were ۲۷ and ۲۳ patients with right and left breast cancer, respectively. In both groups, the relative perfusion of the lung on the radiotherapy side decreased by an average of ۵%, which was significant (P-value<۰.۰۵). Among ۲۷ patients (۵۴%), lung perfusion defects were observed in the SPECT images. No significant changes were observed between the PFTs before and after radiotherapy (P-value>۰.۰۵). No significant relationship was investigated between V۲۰ and mean lung dose (MLD) with relative perfusion of the irradiated lung (P-value>۰.۰۵).Conclusion: In this investigation, we demonstrated that quantitative PPS and lung perfusion SPECT were are more reliable than PFTs for evaluating lung following radiotherapy for breast cancer. However, the relative lung perfusion bore no relevancy to V۲۰ and MLD.

Authors

Siamak Derakhshan

Department of Radiotherapy, Faculty of Paramedical Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran

Zeinab Salehi

Department of Radiotherapy, Faculty of Paramedical Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran

Sabah Hasani

Department of Internal Medicine, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran

Farideh Elahimanesh

Department of Radiotherapy, Faculty of Paramedical Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran

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