Maximum distance in single-isocenter technique of stereotactic radiosurgery with rotational error using margin-based analysis
| العنوان: | Maximum distance in single-isocenter technique of stereotactic radiosurgery with rotational error using margin-based analysis |
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| المؤلفون: | Hirotake Saito, Toshimichi Nakano, Madoka Sakai, Takumi Yamada, Satoshi Tanabe, Hiroyuki Ishikawa, Satoru Utsunomiya, Motoki Kaidu, Hisashi Nakano, Ryuta Sasamoto, Takeshi Takizawa, Hironori Sakai, Atsushi Ohta |
| المصدر: | Radiological Physics and Technology. 14:57-63 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | medicine.medical_treatment, Physical Therapy, Sports Therapy and Rehabilitation, Geometry, Radiosurgery, 030218 nuclear medicine & medical imaging, Reduction (complexity), 03 medical and health sciences, 0302 clinical medicine, Margin (machine learning), medicine, Range (statistics), Humans, Computer Simulation, Radiology, Nuclear Medicine and imaging, In patient, Mathematics, Radiation, Rotational error, Brain Neoplasms, Radiotherapy Planning, Computer-Assisted, Isocenter, Radiotherapy Dosage, General Medicine, Ptv margin, 030220 oncology & carcinogenesis |
| الوصف: | Through geometrical simulation, we evaluated the effect of rotational error in patient setup on geometrical coverage and calculated the maximum distance between the isocenter and target, where the clinical PTV margin secures geometrical coverage with a single-isocenter technique. We used simulated spherical GTVs with diameters of 1.0 (GTV 1), 1.5 (GTV 2), 2.0 (GTV 3), and 3.0 cm (GTV 4). The location of the target center was set such that the distance between the target and isocenter ranged from 0 to 15 cm. We created geometrical coverage vectors so that each target was entirely covered by 100% of the prescribed dose. The vectors of the target positions were simultaneously rotated within a range of 0°–2.0° around the x-, y-, and z-axes. For each rotational error, the reduction in geometrical coverage of the targets was calculated and compared with that obtained for a rotational error of 0°. The tolerance value of the geometrical coverage reduction was defined as 5% of the GTV. The maximum distance that satisfied the 5% tolerance value for different values of rotational error at a clinical PTV margin of 0.1 cm was calculated. When the rotational errors were 0.5° for a 0.1 cm PTV margin, the maximum distances were as follows: GTV 1: 7.6 cm; GTV 2: 10.9 cm; GTV 3: 14.3 cm; and GTV 4: 21.4 cm. It might be advisable to exclude targets that are > 7.6 cm away from the isocenter with a single-isocenter technique to satisfy the tolerance value for all GTVs. |
| تدمد: | 1865-0341 1865-0333 |
| DOI: | 10.1007/s12194-020-00602-2 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9d583a78f1079407a9184aa768e8bf9 https://doi.org/10.1007/s12194-020-00602-2 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....f9d583a78f1079407a9184aa768e8bf9 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18650341 18650333 |
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| DOI: | 10.1007/s12194-020-00602-2 |