Matches in SemOpenAlex for { <https://semopenalex.org/work/W2022301981> ?p ?o ?g. }
Showing items 1 to 62 of
62
with 100 items per page.
- W2022301981 abstract "Purpose: We investigated the effect of detector size for output factor measurement of small field in Gamma knife. Measured and corrected output factors using deconvolution to remove the effect of detector size for the 4 mm collimator were compared. Method and Materials: The output factors were measured with a pinpoint ionization chamber, a glass rod detector (GRD) from the 14, 8 and 4 mm helmets relative to the 18 mm collimator. The measured output factors were corrected for spatial averaging effects by measuring dose profiles for the 4 mm collimator with the same detectors and deconvolving their response from the measured profiles. A Gaussian kernel was used to describe the detector response. The measuring volume of the pinpoint chamber was 0.015 cm3 and the size of the GRD was 1.5 mm in diameter and 8.5 mm in length. All measurements were performed in spherical polystyrene head phantom having a diameter of 160 mm. Results: The 4 mm collimator output factor measured by the pinpoint chamber was 0.699±0.009 and the GRD measurement was 0.861±0.015. The corrected output factor by deconvolving for the 4 mm collimator was 0.853 for the pinpoint chamber and 0.874 for the GRD. Conclusion: The output factors obtained with a GRD are within 1.1 % in good agreement with the values recommended by the manufacture. The difference for measured and corrected value of output factor based on GRD detector is within 1.5%. The GRD may be a useful detector for small field dosimetry. However, the measured value of the 4 mm collimator output factor from the pinpoint ion chamber is significantly lower than the results obtained using the GRD. Due to the large volume of pinpoint chamber compared to other detectors used, a significant deconvoltuion correction is noted for the for the smaller collimator size." @default.
- W2022301981 created "2016-06-24" @default.
- W2022301981 creator A5014071113 @default.
- W2022301981 creator A5024011944 @default.
- W2022301981 creator A5059264647 @default.
- W2022301981 creator A5087065338 @default.
- W2022301981 date "2007-06-01" @default.
- W2022301981 modified "2023-09-23" @default.
- W2022301981 title "SU-FF-T-404: The Effect of Detector Size On Measurement of Output Factor of 4 Mm Collimator in Gamma Knife" @default.
- W2022301981 doi "https://doi.org/10.1118/1.2761129" @default.
- W2022301981 hasPublicationYear "2007" @default.
- W2022301981 type Work @default.
- W2022301981 sameAs 2022301981 @default.
- W2022301981 citedByCount "0" @default.
- W2022301981 crossrefType "journal-article" @default.
- W2022301981 hasAuthorship W2022301981A5014071113 @default.
- W2022301981 hasAuthorship W2022301981A5024011944 @default.
- W2022301981 hasAuthorship W2022301981A5059264647 @default.
- W2022301981 hasAuthorship W2022301981A5087065338 @default.
- W2022301981 hasConcept C104293457 @default.
- W2022301981 hasConcept C120665830 @default.
- W2022301981 hasConcept C121332964 @default.
- W2022301981 hasConcept C145148216 @default.
- W2022301981 hasConcept C151770136 @default.
- W2022301981 hasConcept C174576160 @default.
- W2022301981 hasConcept C192562407 @default.
- W2022301981 hasConcept C198291218 @default.
- W2022301981 hasConcept C2779200277 @default.
- W2022301981 hasConcept C2989005 @default.
- W2022301981 hasConcept C62520636 @default.
- W2022301981 hasConcept C71924100 @default.
- W2022301981 hasConcept C94915269 @default.
- W2022301981 hasConceptScore W2022301981C104293457 @default.
- W2022301981 hasConceptScore W2022301981C120665830 @default.
- W2022301981 hasConceptScore W2022301981C121332964 @default.
- W2022301981 hasConceptScore W2022301981C145148216 @default.
- W2022301981 hasConceptScore W2022301981C151770136 @default.
- W2022301981 hasConceptScore W2022301981C174576160 @default.
- W2022301981 hasConceptScore W2022301981C192562407 @default.
- W2022301981 hasConceptScore W2022301981C198291218 @default.
- W2022301981 hasConceptScore W2022301981C2779200277 @default.
- W2022301981 hasConceptScore W2022301981C2989005 @default.
- W2022301981 hasConceptScore W2022301981C62520636 @default.
- W2022301981 hasConceptScore W2022301981C71924100 @default.
- W2022301981 hasConceptScore W2022301981C94915269 @default.
- W2022301981 hasLocation W20223019811 @default.
- W2022301981 hasOpenAccess W2022301981 @default.
- W2022301981 hasPrimaryLocation W20223019811 @default.
- W2022301981 hasRelatedWork W1427709115 @default.
- W2022301981 hasRelatedWork W1556982571 @default.
- W2022301981 hasRelatedWork W1982390167 @default.
- W2022301981 hasRelatedWork W2032385593 @default.
- W2022301981 hasRelatedWork W2062097180 @default.
- W2022301981 hasRelatedWork W2079175123 @default.
- W2022301981 hasRelatedWork W2156965174 @default.
- W2022301981 hasRelatedWork W2237136888 @default.
- W2022301981 hasRelatedWork W2515343361 @default.
- W2022301981 hasRelatedWork W2974598124 @default.
- W2022301981 isParatext "false" @default.
- W2022301981 isRetracted "false" @default.
- W2022301981 magId "2022301981" @default.
- W2022301981 workType "article" @default.