Clinical implementation of Dosimetry Check ™ for TomoTherapy® delivery quality assurance.
CONCLUSION: We have clinically implemented DC for the DQA of TomoTherapy® -based helical IMRT treatment plans. DC carried out the accurate DQA results as performed with the conventional cheese phantom method. This new DQA system provided more information in verifying the dose delivery to patients, while simplifying the DQA process. PMID: 30354001 [PubMed - as supplied by publisher]
We report current UK practice for immobilisation of soft tissue sarcoma of STSE, as part of the initial study set-up within the IMRiS trial, a phase II study of intensity modulated radiotherapy (IMRT) in primary bone and soft tissue sarcoma.
Four years ago, Varianâs Applied Research Team, a group separate from its research and development unit, began looking at how to incorporate artificial intelligence into cancer therapy. The teamâs hard work has resulted in the development of Ethos, an AI-driven holistic solution designed to increase the efficiency of radiotherapy. MD+DI spoke with Chris Toth, president of Varian Oncology Systems ahead of Ethosâ launch at the American Society for Radiation Oncology [ASTRO] annual meeting in Chicago held this week. Ethos is an Adaptive IntelligenceÂ solution. T...
Intensity modulated radiotherapy (IMRT) and volumetric modulated arc therapy (VMAT) treatment plan generation is a complex process, traditionally performed manually by medical physicists or specialist dosimetrists. Manual methods can be time consuming and dependent on the treatment planner ’s experience . A solution to this problem is automated planning, where high quality plans are generated autonomously with minimal operator interaction [2–9].
Conclusions: HART represents an attractive approach for patients with HNSCC where treatment intensification is indicated. PMID: 31519130 [PubMed - as supplied by publisher]
AbstractIntroductionTo investigate whether the implantation of a hydrogel spacer (SpaceOAR) reduces long ‐term rectal toxicity for prostate cancer patients treated with intensity‐modulated radiotherapy (IMRT).MethodsPatients with localised prostate cancer treated with 81 Gy in 45 fx of IMRT over 9 weeks were retrospectively compared: 65 patients with SpaceOAR and 56 patients without SpaceOAR. Planning aims restricted rectal doses to V40 Gy
Conclusion: The novel TPS-based heterogeneity correction can improve the 2D and 3D EPID-based back projection technique. Structures with large heterogeneities can also be handled using the proposed technique.
Conclusions: VMAT plan can reduce the risk of secondary malignancy while treating different sites of cancer. VMAT is the most appropriate technique than IMRT, especially in the treatment of large tumor volume. Special attention has to be given, especially while treating women and children.
N V. N Madhusudhana Sresty, A Krishnam Raju, B Nagarjuna Reddy, VC Sahithya, Yakub Mohmd, G Deleep Kumar, T Anil Kumar, Tasneem Rushdi, S Aparna, G Durga Prasad, Harjot Kaur BajwaJournal of Medical Physics 2019 44(3):222-227TomoTherapy® is a modern radiation treatment technique in which intensity-modulated radiation therapy (IMRT) is delivered in helical fashion. A two-dimensional (2D) array which has been existing for IMRT patient-specific quality assurance (PSQA) verifications for many years is I'MatriXX. Our objectives were to validate this I'MatriXX and to evaluate it for different patient sites and fracti...
ConclusionsThe commissioning and validation of dosimetry was performed with the help of various fields, MLC patterns and complex treatment plans. The present study also evaluated the efficiency of the 3D dosimetry system for the QA of complex treatment plans.
This study aimed to evaluate the prognostic value of combining pretreatment Epstein ‐Barr virus (EBV) DNA level and cervical node necrosis (CNN) for patients with nasopharyngeal carcinoma (NPC) receiving intensity‐modulated radiotherapy (IMRT). A total of 607 incident nonmetastatic NPC patients treated with IMRT ± chemotherapy were reviewed. Patients were divided into four g roups based on EBV DNA level and CNN status. The primary endpoint was progression‐free survival (PFS). Kaplan‐Meier curves with log‐rank test were applied to compare survival outcomes and the Cox proportional model was used t...