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مقالات فارسیISIکنفرانسهاژورنالها

Assessment of Internal and External Surrogates for Lung Stereotactic Body Radiation Therapy

محل انتشار: مجله فیزیک پزشکی ایران، دوره: 18، شماره: 5
سال انتشار: 1400
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 196

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لینک ثابت به این مقاله:
https://civilica.com/doc/1296082

شناسه ملی سند علمی:

JR_IJMP-18-5_008

تاریخ نمایه سازی: 1 آبان 1400

چکیده مقاله:

Introduction: In this study, we aimed to evaluate internal (lung, heart and diaphragm) and external (nine glass marbles) marker motion in correlation with lung tumor motion and determine potential surrogate for respiratory gating radiation therapy (RGRT) depending on tumor localization, upper lobe (UL) versus lower lobe (LL).Material and Methods: We included ۵۸ patients (۳۴ male and ۲۴ female) with small lung cancer (≤ ۵cm), who underwent stereotactic body radiation therapy (SBRT). All patients were scanned and contoured in all ten phases (Varian Eclipse ۱۳.۷) after four-dimensional computed tomography simulation (۴D-CT). The motions of internal and external markers were analyzed and correlated with tumor motion. Pearson correlation coefficient (PCC) was used to evaluate the correlation between internal and external marker motion and tumor motion.Results: The median (range) values of tumor motion were ۳.۲ (۰.۶-۱۱.۰) and ۸.۶ (۴.۰-۲۴.۰) mm in the UL and LL, respectively. The median (range) values of organs motion and PCC comparing UL vs. LL were ۲.۰ (۰.۳-۹.۱) vs. ۶.۰ (۲.۸-۱۳.۹) mm and ۰.۴۶ (۰.۳۰-۰.۹۵) vs. ۰.۷۹ (۰.۵۰-۰.۹۴) for the lung, respectively, ۱۱.۹ (۲.۵-۱۶.۳) vs. ۱۲.۵ (۵.۰-۲۲.۵) mm and ۰.۶۸ (۰.۱۱-۰.۹۳) vs. ۰.۸۹ (۰.۳۰-۰.۹۹) for the diaphragm, respectively, and ۳.۹ (۲.۵-۶.۳) vs. ۷.۶ (۴.۵-۸.۶) mm and ۰.۴۹ (۰.۲۰-۰.۷۰) vs. ۰.۵۹ (۰.۳۶-۰.۸۳) for the heart, respectively. The external marker motion and correlation coefficient for UL and LL were ۲.۵ (۰.۹-۷.۴) vs. ۲.۳ (۱.۰-۵.۹) mm and ۰.۵۴ (۰.۰۹-۰.۹۶) vs. ۰.۷۳ (۰.۲۷-۰.۹۴), respectively.Conclusion: Lung and diaphragm motion correlate better with tumor motion than the external marker. Diaphragm motion can be an excellent indicator for treatment based on RGRT.  

کلیدواژه ها:

Lung Cancer Motion Surrogate Marker Four ، Dimensional Computed Tomography Stereotactic Body Radiotherapy

نویسندگان

MILOVAN SAVANOVIC

Faculty of Medicine, University of Paris-Saclay, ۹۴۲۷۶ Le Kremlin-Bicêtre, France. Department of Radiation Oncology, Tenon Hospital, ۷۵۰۲۰ Paris, France.

Bojan Strbac

MATER Private Hospital, Physics department, Eccles Street, Dublin ۷, Ireland.

Drazan Jaros

Affidea, International Medical Centers, Center for Radiotherapy, ۷۸۰۰۰ Banja Luka, Bosnia and Herzegovina.

Dejan Cazic

Affidea, International Medical Centers, Center for Radiotherapy, ۷۸۰۰۰ Banja Luka, Bosnia and Herzegovina.

Goran Kolarevic

Affidea, International Medical Centers, Center for Radiotherapy, ۷۸۰۰۰ Banja Luka, Bosnia and Herzegovina.

Jean-Noel Foulquier

Faculty of Medicine, University of Paris-Saclay, ۹۴۲۷۶ Le Kremlin-Bicêtre, France.

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