Matches in SemOpenAlex for { <https://semopenalex.org/work/W1976483749> ?p ?o ?g. }
Showing items 1 to 74 of
74
with 100 items per page.
- W1976483749 endingPage "2955" @default.
- W1976483749 startingPage "2955" @default.
- W1976483749 abstract "Purpose: To investigate the ability to predict individualized PTV margins for prostate treatment based on limited real-time intrafraction motion data. Method and Materials: Under IRB approved protocols, 35 patients with 3 transponders implanted in the prostate were studied. Transponders were placed at the apex, right- and left-base under ultrasound guidance. Isocenter was chosen relative to the centroid of the transponders and the patients were initially positioned using the electromagnetic system. The relative position of the transponders was monitored continuously during each fraction, at 10 Hz. The probability distribution of absolute displacements from isocenter was found in each direction for the first fraction. Cumulative margins, Mn, were found using van Herk's formula after each fraction, including all fractions (n=N), to determine the best retrospective PTV margin for each individual patient. Metrics from the first fraction's probability distribution were tested for correlation (Pearson's r, Pr) with the final cumulative margin. These metrics included the position in each direction which was >= 50% and 95% (R50, R95) of absolute deviations from isocenter. The percentage of patients for which was found after n fractions. Results: The correlation coefficients in the Left-Right, Anterior-Posterior, and Superior-Inferior directions were Pr50 = (0.275, 0.422, 0.177), Pr95 = (0.435, 0.489, 0.168). The percentage of patients within 1 mm of their final margin after n=2, 3, 5, 10, 20 days was LR = (94.3, 97.1, 97.1, 100.0, 100.0)%, AP = (40.0, 57.1, 74.3, 91.4, 97.1)%, and SI = (34.3, 37.1, 65.7, 91.4)%. Conclusion: R50 and R95 from a single fraction of measured intrafraction displacements are poorly correlated with a given patient's final individualized margins. In addition, 15 to 20 fractions are required to estimate margins within 1 mm for 90% of patients. Conflict of Interest: Supported by NIHP01CA59827 and Calypso Medical." @default.
- W1976483749 created "2016-06-24" @default.
- W1976483749 creator A5000438199 @default.
- W1976483749 creator A5032096453 @default.
- W1976483749 creator A5045139171 @default.
- W1976483749 creator A5059664704 @default.
- W1976483749 date "2008-06-01" @default.
- W1976483749 modified "2023-09-25" @default.
- W1976483749 title "WE-E-AUD C-05: Predictability of Patient Specific Prostate Margins From Real-Time Intrafraction Motion Measurements" @default.
- W1976483749 doi "https://doi.org/10.1118/1.2962786" @default.
- W1976483749 hasPublicationYear "2008" @default.
- W1976483749 type Work @default.
- W1976483749 sameAs 1976483749 @default.
- W1976483749 citedByCount "0" @default.
- W1976483749 crossrefType "journal-article" @default.
- W1976483749 hasAuthorship W1976483749A5000438199 @default.
- W1976483749 hasAuthorship W1976483749A5032096453 @default.
- W1976483749 hasAuthorship W1976483749A5045139171 @default.
- W1976483749 hasAuthorship W1976483749A5059664704 @default.
- W1976483749 hasConcept C104293457 @default.
- W1976483749 hasConcept C105795698 @default.
- W1976483749 hasConcept C119857082 @default.
- W1976483749 hasConcept C141071460 @default.
- W1976483749 hasConcept C149629883 @default.
- W1976483749 hasConcept C178790620 @default.
- W1976483749 hasConcept C181401712 @default.
- W1976483749 hasConcept C185429906 @default.
- W1976483749 hasConcept C185592680 @default.
- W1976483749 hasConcept C2779244869 @default.
- W1976483749 hasConcept C2989005 @default.
- W1976483749 hasConcept C33923547 @default.
- W1976483749 hasConcept C41008148 @default.
- W1976483749 hasConcept C509974204 @default.
- W1976483749 hasConcept C71924100 @default.
- W1976483749 hasConcept C774472 @default.
- W1976483749 hasConcept C81790035 @default.
- W1976483749 hasConceptScore W1976483749C104293457 @default.
- W1976483749 hasConceptScore W1976483749C105795698 @default.
- W1976483749 hasConceptScore W1976483749C119857082 @default.
- W1976483749 hasConceptScore W1976483749C141071460 @default.
- W1976483749 hasConceptScore W1976483749C149629883 @default.
- W1976483749 hasConceptScore W1976483749C178790620 @default.
- W1976483749 hasConceptScore W1976483749C181401712 @default.
- W1976483749 hasConceptScore W1976483749C185429906 @default.
- W1976483749 hasConceptScore W1976483749C185592680 @default.
- W1976483749 hasConceptScore W1976483749C2779244869 @default.
- W1976483749 hasConceptScore W1976483749C2989005 @default.
- W1976483749 hasConceptScore W1976483749C33923547 @default.
- W1976483749 hasConceptScore W1976483749C41008148 @default.
- W1976483749 hasConceptScore W1976483749C509974204 @default.
- W1976483749 hasConceptScore W1976483749C71924100 @default.
- W1976483749 hasConceptScore W1976483749C774472 @default.
- W1976483749 hasConceptScore W1976483749C81790035 @default.
- W1976483749 hasIssue "6Part25" @default.
- W1976483749 hasLocation W19764837491 @default.
- W1976483749 hasOpenAccess W1976483749 @default.
- W1976483749 hasPrimaryLocation W19764837491 @default.
- W1976483749 hasRelatedWork W1137363691 @default.
- W1976483749 hasRelatedWork W1964021750 @default.
- W1976483749 hasRelatedWork W1964511504 @default.
- W1976483749 hasRelatedWork W1976483749 @default.
- W1976483749 hasRelatedWork W2002303569 @default.
- W1976483749 hasRelatedWork W2049125444 @default.
- W1976483749 hasRelatedWork W2088863000 @default.
- W1976483749 hasRelatedWork W2470090924 @default.
- W1976483749 hasRelatedWork W3094132052 @default.
- W1976483749 hasRelatedWork W4365135315 @default.
- W1976483749 hasVolume "35" @default.
- W1976483749 isParatext "false" @default.
- W1976483749 isRetracted "false" @default.
- W1976483749 magId "1976483749" @default.
- W1976483749 workType "article" @default.