dc.contributor.author | Sritharan, K | |
dc.contributor.author | Dunlop, A | |
dc.contributor.author | Mohajer, J | |
dc.contributor.author | Adair-Smith, G | |
dc.contributor.author | Barnes, H | |
dc.contributor.author | Brand, D | |
dc.contributor.author | Greenlay, E | |
dc.contributor.author | Hijab, A | |
dc.contributor.author | Oelfke, U | |
dc.contributor.author | Pathmanathan, A | |
dc.contributor.author | Mitchell, A | |
dc.contributor.author | Murray, J | |
dc.contributor.author | Nill, S | |
dc.contributor.author | Parker, C | |
dc.contributor.author | Sundahl, N | |
dc.contributor.author | Tree, AC | |
dc.coverage.spatial | Ireland | |
dc.date.accessioned | 2022-09-30T11:48:02Z | |
dc.date.available | 2022-09-30T11:48:02Z | |
dc.date.issued | 2022-11-01 | |
dc.identifier | S2405-6308(22)00066-0 | |
dc.identifier.citation | Clinical and Translational Radiation Oncology, 2022, 37 pp. 25 - 32 | |
dc.identifier.issn | 2405-6308 | |
dc.identifier.uri | https://repository.icr.ac.uk/handle/internal/5512 | |
dc.identifier.eissn | 2405-6308 | |
dc.identifier.eissn | 2405-6308 | |
dc.identifier.doi | 10.1016/j.ctro.2022.08.004 | |
dc.description.abstract | BACKGROUND: The prostate demonstrates inter- and intra- fractional changes and thus adaptive radiotherapy would be required to ensure optimal coverage. Daily adaptive radiotherapy for MRI-guided radiotherapy can be both time and resource intensive when structure delineation is completed manually. Contours can be auto-generated on the MR-Linac via a deformable image registration (DIR) based mapping process from the reference image. This study evaluates the performance of automatically generated target structure contours against manually delineated contours by radiation oncologists for prostate radiotherapy on the Elekta Unity MR-Linac. METHODS: Plans were generated from prostate contours propagated by DIR and rigid image registration (RIR) for forty fractions from ten patients. A two-dose level SIB (simultaneous integrated boost) IMRT plan is used to treat localised prostate cancer; 6000 cGy to the prostate and 4860 cGy to the seminal vesicles. The dose coverage of the PTV 6000 and PTV 4860 created from the manually drawn target structures was evaluated with each plan. If the dose objectives were met, the plan was considered successful in covering the gold standard (clinician-delineated) volume. RESULTS: The mandatory PTV 6000 dose objective (D98% > 5580 cGy) was met in 81 % of DIR plans and 45 % of RIR plans. The SV were mapped by DIR only and for all the plans, the PTV 4860 dose objective met the optimal target (D98% > 4617 cGy). The plans created by RIR led to under-coverage of the clinician-delineated prostate, predominantly at the apex or the bladder-prostate interface. CONCLUSION: Plans created from DIR propagation of prostate contours outperform those created from RIR propagation. In approximately 1 in 5 DIR plans, dosimetric coverage of the gold standard PTV was not clinically acceptable. Thus, at our institution, we use a combination of DIR propagation of contours alongside manual editing of contours where deemed necessary for online treatments. | |
dc.format | Electronic-eCollection | |
dc.format.extent | 25 - 32 | |
dc.language | eng | |
dc.language.iso | eng | |
dc.publisher | ELSEVIER IRELAND LTD | |
dc.relation.ispartof | Clinical and Translational Radiation Oncology | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.subject | Adaptive radiotherapy | |
dc.subject | Auto-contouring | |
dc.subject | MR-Linac | |
dc.subject | MRI-gRT | |
dc.subject | Prostate cancer | |
dc.title | Dosimetric comparison of automatically propagated prostate contours with manually drawn contours in MRI-guided radiotherapy: A step towards a contouring free workflow? | |
dc.type | Journal Article | |
dcterms.dateAccepted | 2022-08-04 | |
dc.date.updated | 2022-09-30T10:24:00Z | |
rioxxterms.version | VoR | |
rioxxterms.versionofrecord | 10.1016/j.ctro.2022.08.004 | |
rioxxterms.licenseref.startdate | 2022-11-01 | |
rioxxterms.type | Journal Article/Review | |
pubs.author-url | https://www.ncbi.nlm.nih.gov/pubmed/36052018 | |
pubs.organisational-group | /ICR | |
pubs.organisational-group | /ICR/Primary Group | |
pubs.organisational-group | /ICR/Primary Group/ICR Divisions | |
pubs.organisational-group | /ICR/Primary Group/ICR Divisions/Radiotherapy and Imaging | |
pubs.organisational-group | /ICR/Primary Group/ICR Divisions/Radiotherapy and Imaging/Radiotherapy Physics Modelling | |
pubs.organisational-group | /ICR/Primary Group/ICR Divisions/Radiotherapy and Imaging/Stereotactic and Precision Body Radiotherapy | |
pubs.organisational-group | /ICR/Primary Group/Royal Marsden Clinical Units | |
pubs.organisational-group | /ICR/Primary Group/ICR Divisions/Radiotherapy and Imaging/Uro-oncology Clinical Trials | |
pubs.organisational-group | /ICR/Students | |
pubs.organisational-group | /ICR/Students/PhD and MPhil | |
pubs.organisational-group | /ICR/Students/PhD and MPhil/17/18 Starting Cohort | |
pubs.publication-status | Published online | |
pubs.publisher-url | http://dx.doi.org/10.1016/j.ctro.2022.08.004 | |
pubs.volume | 37 | |
icr.researchteam | Uro-oncology Trials | |
icr.researchteam | Stereotactic Radiother | |
icr.researchteam | Radiother Phys Modelling | |
dc.contributor.icrauthor | Sritharan, Kobika | |
dc.contributor.icrauthor | Brand, Douglas | |
dc.contributor.icrauthor | Nill, Simeon | |
icr.provenance | Deposited by Dr Doug Brand on 2022-09-30. Deposit type is initial. No. of files: 1. Files: Dosimetric comparison of automatically propagated prostate contours with manually drawn contours in MRI-guided radiotherapy .pdf | |