Feasibility of simultaneous integrated boost for high-dose treatment of high-risk prostate cancer
E. S. Sukhikh,
L. G. Sukhikh,
A. V. Taletsky,
Zh. A. Startseva,
V. V. Verkhoturova,
V. V. Rozanov,
E. A. Selikhova https://doi.org/10.21294/1814-4861-2023-22-3-57-65
Abstract
Background. Radiation therapy for high-risk prostate cancer presents a challenge for cancer radiotherapists. The improvement of treatment outcomes is associated with radiation dose escalation and prophylactic irradiation of lymph nodes, therefore, the development of the new treatment schemes is needed. Simultaneous integrated boost technique based on the volumetric modulated arc therapy is the most efficient treatment option. Material and Methods. The anatomical data of 10 patients with high-risk prostate cancer was used for dosimetry-based treatment planning. Both simultaneous integrated boost and sequential boost technique were considered. The treatment planning goal was to deliver the equivalent dose of 96 Gy at 2 Gy per fraction (EQD2=96 Gy) (α/β=1.5 Gy) to the prostate, EQD2=62.5 Gy to the seminal vesicles and EQD2=50 Gy to lymph nodes avoiding damaging the organs at risk, mainly the bladder and rectum. The irradiation was based on volumetric modulated arc therapy with two partially coplanar arcs and two rotations at each arc. The obtained dose distributions were compared with respect to dose-volume histograms and equivalent uniform doses (EUD). Results. In the case of sequential boost, the minimal dose delivered to the prostate was equal to 95.9 ± 2.1 Gy, EUD=104.9 ± 1.7 Gy. The dose delivered to 2 cm3 (D2cc) bladder was 97.4 ± 2.0 Gy. Normal tissue complication probability (NTCP) was 1.64 %. The dose delivered to 2 cm3 (D2cc) rectum was 103.4 ± 9.2 Gy and NTCP was 27.4 %. In the case of simultaneous integrated boost, the minimal dose delivered to the prostate was equal to 90.4 ± 2.3 Gy, EUD=103.9 ± 1.3 Gy. The bladder dose was as high as D2cc=96.1 ± 5.2 Gy, NTCP=0.176 ± 0.132 %, the rectum dose - D2cc=81.1 ± 6.0 Gy, NTCP=2.34 ± 1.92 %. Conclusion. Volumetric modulated arc therapy along with simultaneous integrated boost have shown the feasibility of simultaneous irradiation of the prostate, seminal vesicles and lymph nodes up to the prescribed dose values without significant over irradiation of the organs at risk (OARs). Dose values in the tumor as high as EUD=103.9 ± 1.3 Gy along with prophylactic irradiation of lymph nodes may result in higher tumor control probability value and should be considered for clinical trials.
Keywords
prostate cancer,
volumetric modulated arc therapy,
hypofractionated radiotherapy,
simultaneous integrated boost,
high risk
Supporting agencies: This work has been partly supported by the Tomsk Polytechnic University Development Programme “Priority 2030”.
About the Authors
E. S. Sukhikh
Tomsk Polytechnic University; Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences
Russian Federation
Russian Federation
Evgeniya S. Sukhikh - PhD, Head of the Technological Reference Center for Ionizing Radiation in Radiology, Radiation Therapy and Nuclear Medicine, Tomsk Polytechnic University; Researcher of the Radiotherapy Department, Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences.
30, Lenin Ave., 634050, Tomsk; 5, Kooperativny St., 634009, Tomsk
Author ID (Scopus): 57200560611
L. G. Sukhikh
Tomsk Polytechnic University
Russian Federation
Russian Federation
Leonid G. Sukhikh - DSc, Vice Rector for Science and Technology Transfer, Tomsk Polytechnic University.
30, Lenin Ave., 634050, Tomsk
Researcher ID: I-5274-2013; Author ID (Scopus): 14828396300
A. V. Taletsky
Tomsk Regional Oncological Dispensary
Russian Federation
Russian Federation
Alexander V. Taletsky - MD, Radiotherapist, Tomsk Regional Oncological Dispensary.
115, Lenina Ave., 634050, Tomsk
Zh. A. Startseva
Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences
Russian Federation
Russian Federation
Zhanna A. Startseva - MD, DSc, Professor of the Russian Academy of Sciences, Chief Freelance Radiotherapist in the Siberian Federal District, Head of the Radiotherapy Department, Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences.
5, Kooperativny St., 634009, Tomsk
Author ID (Scopus): 6506368484
V. V. Verkhoturova
Tomsk Polytechnic University
Russian Federation
Russian Federation
Vera V. Verkhoturova - PhD, Acting Head, Scientific and Educational Center for International Nuclear Education and Career Support for Foreign Students, Tomsk Polytechnic University.
30, Lenin Ave., 634050, Tomsk
Author ID (Scopus): 57189517036
V. V. Rozanov
Lomonosov Moscow State University; All-Russian Research Institute of Medicinal and Aromatic Plants
Russian Federation
Russian Federation
Vladimir V. Rozanov - Professor, Leading Researcher, Faculty of Physics, Lomonosov Moscow State University; Head of Laboratory, All-Russian Research Institute of Medicinal and Aromatic Plants.
1, Leninskie Gory, 119991, Moscow; 7, Grina St., 117216, Moscow
Author ID (Scopus): 31367574400
E. A. Selikhova
Tomsk Polytechnic University; Tomsk Regional Oncological Dispensary
Russian Federation
Russian Federation
Ekaterina A. Selikhova - Technician, Tomsk Regional Oncological Dispensary; postgraduate student, Tomsk Polytechnic University.
30, Lenin Ave., 634050, Tomsk; 115, Lenina Ave., 634050, Tomsk
Author ID (Scopus): 57194633777
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Review
For citations:
Sukhikh E.S., Sukhikh L.G., Taletsky A.V., Startseva Zh.A., Verkhoturova V.V., Rozanov V.V., Selikhova E.A. Feasibility of simultaneous integrated boost for high-dose treatment of high-risk prostate cancer. Siberian journal of oncology. 2023;22(3):57-65. https://doi.org/10.21294/1814-4861-2023-22-3-57-65
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