Article ; Online: On the necessity of specialized knowledge-based models for SBRT prostate treatments plans.
2024 Volume 121, Page(s) 103364
Abstract: Purpose: Test whether a well-grounded KBP model trained on moderately hypo-fractionated prostate treatments can be used to satisfactorily drive the optimization of SBRT prostate treatments.: Materials and methods: A KBP model (SBRT-model) was ... ...
Abstract | Purpose: Test whether a well-grounded KBP model trained on moderately hypo-fractionated prostate treatments can be used to satisfactorily drive the optimization of SBRT prostate treatments. Materials and methods: A KBP model (SBRT-model) was developed, trained and validated using the first forty-seven clinically treated VMAT SBRT prostate plans (42.7 Gy/7fx or 36.25 Gy/5fx). The performance and robustness of this model were compared against a high-quality KBP-model (ST-model) that was already clinically adopted for hypo-fractionated (70 Gy/28fx and 60 Gy/20fx) prostate treatments. The two models were compared in terms of their predictions robustness, and the quality of their outcomes were evaluated against a set of reference clinical SBRT plans. Plan quality was assessed using DVH metrics, blinded clinical ranking, and a dedicated Plan Quality Metric algorithm. Results: The plan libraries of the two models were found to share a high degree of anatomical similarity. The overall quality (APQM%) of the plans obtained both with the ST- and SBRT-models was compatible with that of the original clinical plans, namely (93.7 ± 4.1)% and (91.6 ± 3.9)% vs (92.8.9 ± 3.6)%. Plans obtained with the ST-model showed significantly higher target coverage (PTV V95%): (97.9 ± 0.8)% vs (97.1 ± 0.9)% (p < 0.05). Conversely, plans optimized following the SBRT-model showed a small but not-clinically relevant increase in OAR sparing. ST-model generally provided more reliable predictions than SBRT-model. Two radiation oncologists judged as equivalent the plans based on the KBP prediction, which was also judged better that reference clinical plans. Conclusion: A KBP model trained on moderately fractionated prostate treatment plans provided optimal SBRT prostate plans, with similar or larger plan quality than an embryonic SBRT-model based on a limited number of cases. |
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MeSH term(s) | Humans ; Radiotherapy Planning, Computer-Assisted/methods ; Radiosurgery/methods ; Male ; Prostatic Neoplasms/radiotherapy ; Knowledge Bases ; Radiotherapy, Intensity-Modulated/methods ; Radiotherapy Dosage |
Language | English |
Publishing date | 2024-05-02 |
Publishing country | Italy |
Document type | Journal Article |
ZDB-ID | 1122650-x |
ISSN | 1724-191X ; 1120-1797 |
ISSN (online) | 1724-191X |
ISSN | 1120-1797 |
DOI | 10.1016/j.ejmp.2024.103364 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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