Academic Journal
Stereotactic Body Radiotherapy (SBRT) to Localised Prostate Cancer in the Era of MRI-Guided Adaptive Radiotherapy: Doses Delivered in the HERMES Trial Comparing Two- and Five-Fraction Treatments
| Τίτλος: | Stereotactic Body Radiotherapy (SBRT) to Localised Prostate Cancer in the Era of MRI-Guided Adaptive Radiotherapy: Doses Delivered in the HERMES Trial Comparing Two- and Five-Fraction Treatments |
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| Συγγραφείς: | Rosalyne Westley, Francis Casey, Adam Mitchell, Sophie Alexander, Simeon Nill, Julia Murray, Ragu Ratnakumaran, Angela Pathmanathan, Uwe Oelfke, Alex Dunlop, Alison C. Tree |
| Πηγή: | Cancers, Vol 16, Iss 11, p 2073 (2024) |
| Στοιχεία εκδότη: | MDPI AG |
| Έτος έκδοσης: | 2024 |
| Συλλογή: | Directory of Open Access Journals: DOAJ Articles |
| Θεματικοί όροι: | SBRT, prostate radiotherapy, MRI-guided adaptive radiotherapy, intrafraction motion, Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282 |
| Περιγραφή: | HERMES is a phase II trial of MRI-guided daily-adaptive radiotherapy (MRIgART) randomising men with localised prostate cancer to either 2-fractions of SBRT with a boost to the tumour or 5-fraction SBRT. In the context of this highly innovative regime the dose delivered must be carefully considered. The first ten patients recruited to HERMES were analysed in order to establish the dose received by the targets and organs at risk (OARS) in the context of intrafraction motion. A regression analysis was performed to measure how the volume of air within the rectum might further impact rectal dose secondary to the electron return effect (ERE). One hundred percent of CTV target objectives were achieved on the MRI taken prior to beam-on-time. The post-delivery MRI showed that high-dose CTV coverage was achieved in 90% of sub-fractions (each fraction is delivered in two sub-fractions) in the 2-fraction cohort and in 88% of fractions the 5-fraction cohort. Rectal D1 cm 3 was the most exceeded constraint; three patients exceeded the D1 cm 3 < 20.8 Gy in the 2-fraction cohort and one patient exceeded the D1 cm 3 < 36 Gy in the 5-fraction cohort. The volume of rectal gas within 1 cm of the prostate was directly proportional to the increase in rectal D1 cm 3 , with a strong (R = 0.69) and very strong (R = 0.90) correlation in the 2-fraction and 5-fraction cohort respectively. Dose delivery specified in HERMES is feasible, although for some patients delivered doses to both target and OARs may vary from those planned. |
| Τύπος εγγράφου: | article in journal/newspaper |
| Γλώσσα: | English |
| Relation: | https://www.mdpi.com/2072-6694/16/11/2073; https://doaj.org/toc/2072-6694; https://doaj.org/article/b8aa0528638f46bf8ec560c9ff8fc285 |
| DOI: | 10.3390/cancers16112073 |
| Διαθεσιμότητα: | https://doi.org/10.3390/cancers16112073 https://doaj.org/article/b8aa0528638f46bf8ec560c9ff8fc285 |
| Αριθμός Καταχώρησης: | edsbas.1A351E7D |
| Βάση Δεδομένων: | BASE |
| DOI: | 10.3390/cancers16112073 |
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