Matches in SemOpenAlex for { <https://semopenalex.org/work/W2888573723> ?p ?o ?g. }
Showing items 1 to 86 of
86
with 100 items per page.
- W2888573723 abstract "Purpose The purpose of this study was to compare dosimetry specifications between kilovoltage (kV) radiotherapy units available at Danish radiotherapy departments. Methods A survey was conducted to gather information about the kV radiotherapy units in Danish radiotherapy departments, i.e. which dosimetry protocols each centre followed, the dosimeters used for calibration, kVp of the clinically used energies, measured half-value layer (HVL), dose rate, output factors, and depth dose measurements. Results Six of the seven Danish radiotherapy departments offer kV radiotherapy, and all six centres contributed data to the study. All kV units are from the same manufacturer, and all centres use clinical energies up to 100 kVp. Beam quality as measured by the HVL ranges from 0.9 to 4.2 mm aluminium, and all centres offer at least two different beam qualities. Dose rate output varies between 3.8 and 7.5 Gy/minute for a 4 cm diameter field, depending on the beam quality and kVp. Different protocols for the determination of absorbed dose are used, with 3 centres following the IPEMB protocol (Phys Med Biol 1996, pp2602-25), 2 centres following the IAEA TRS 277 protocol, and 1 centre following the AAPM protocol (Med Phys 2001, pp868-93). 4 centres use Farmer type cylindrical ion chambers for absolute dosimetry, while 2 centres use plane-parallel chambers. Comparing the data across the departments revealed no systematic differences based on the absorbed dose protocol each department followed. There may be a slight difference in the determination of relative output of the different applicators depending on the ion chamber used for output factor measurements, but with limited data available this remains inconclusive. The 90% and 85% dose to water range of x-rays agree between the departments within 1 mm for similar beam qualities, even though different methods were used to determine the depth dose deposition. Conclusions A national comparison of kV radiotherapy units was conducted, and overall the units were found very similar. No systematic differences were observed based on the calibration protocol, but the available data hint that the choice of ion chamber for calibration measurements may have a small effect on the determination of output factors." @default.
- W2888573723 created "2018-08-31" @default.
- W2888573723 creator A5011963646 @default.
- W2888573723 creator A5035330641 @default.
- W2888573723 creator A5042491356 @default.
- W2888573723 creator A5043913329 @default.
- W2888573723 creator A5049725712 @default.
- W2888573723 creator A5058364574 @default.
- W2888573723 date "2018-08-01" @default.
- W2888573723 modified "2023-10-14" @default.
- W2888573723 title "[P250] National survey of kilovoltage radiotherapy equipment in Denmark" @default.
- W2888573723 doi "https://doi.org/10.1016/j.ejmp.2018.06.530" @default.
- W2888573723 hasPublicationYear "2018" @default.
- W2888573723 type Work @default.
- W2888573723 sameAs 2888573723 @default.
- W2888573723 citedByCount "0" @default.
- W2888573723 crossrefType "journal-article" @default.
- W2888573723 hasAuthorship W2888573723A5011963646 @default.
- W2888573723 hasAuthorship W2888573723A5035330641 @default.
- W2888573723 hasAuthorship W2888573723A5042491356 @default.
- W2888573723 hasAuthorship W2888573723A5043913329 @default.
- W2888573723 hasAuthorship W2888573723A5049725712 @default.
- W2888573723 hasAuthorship W2888573723A5058364574 @default.
- W2888573723 hasConcept C105636585 @default.
- W2888573723 hasConcept C105795698 @default.
- W2888573723 hasConcept C106436119 @default.
- W2888573723 hasConcept C121332964 @default.
- W2888573723 hasConcept C126838900 @default.
- W2888573723 hasConcept C142724271 @default.
- W2888573723 hasConcept C145148216 @default.
- W2888573723 hasConcept C151337348 @default.
- W2888573723 hasConcept C151770136 @default.
- W2888573723 hasConcept C165838908 @default.
- W2888573723 hasConcept C192562407 @default.
- W2888573723 hasConcept C19527891 @default.
- W2888573723 hasConcept C198291218 @default.
- W2888573723 hasConcept C204787440 @default.
- W2888573723 hasConcept C2778618615 @default.
- W2888573723 hasConcept C2780385302 @default.
- W2888573723 hasConcept C2989005 @default.
- W2888573723 hasConcept C3017588741 @default.
- W2888573723 hasConcept C33923547 @default.
- W2888573723 hasConcept C509974204 @default.
- W2888573723 hasConcept C62520636 @default.
- W2888573723 hasConcept C71924100 @default.
- W2888573723 hasConcept C75088862 @default.
- W2888573723 hasConceptScore W2888573723C105636585 @default.
- W2888573723 hasConceptScore W2888573723C105795698 @default.
- W2888573723 hasConceptScore W2888573723C106436119 @default.
- W2888573723 hasConceptScore W2888573723C121332964 @default.
- W2888573723 hasConceptScore W2888573723C126838900 @default.
- W2888573723 hasConceptScore W2888573723C142724271 @default.
- W2888573723 hasConceptScore W2888573723C145148216 @default.
- W2888573723 hasConceptScore W2888573723C151337348 @default.
- W2888573723 hasConceptScore W2888573723C151770136 @default.
- W2888573723 hasConceptScore W2888573723C165838908 @default.
- W2888573723 hasConceptScore W2888573723C192562407 @default.
- W2888573723 hasConceptScore W2888573723C19527891 @default.
- W2888573723 hasConceptScore W2888573723C198291218 @default.
- W2888573723 hasConceptScore W2888573723C204787440 @default.
- W2888573723 hasConceptScore W2888573723C2778618615 @default.
- W2888573723 hasConceptScore W2888573723C2780385302 @default.
- W2888573723 hasConceptScore W2888573723C2989005 @default.
- W2888573723 hasConceptScore W2888573723C3017588741 @default.
- W2888573723 hasConceptScore W2888573723C33923547 @default.
- W2888573723 hasConceptScore W2888573723C509974204 @default.
- W2888573723 hasConceptScore W2888573723C62520636 @default.
- W2888573723 hasConceptScore W2888573723C71924100 @default.
- W2888573723 hasConceptScore W2888573723C75088862 @default.
- W2888573723 hasLocation W28885737231 @default.
- W2888573723 hasOpenAccess W2888573723 @default.
- W2888573723 hasPrimaryLocation W28885737231 @default.
- W2888573723 hasRelatedWork W1978775284 @default.
- W2888573723 hasRelatedWork W1987264178 @default.
- W2888573723 hasRelatedWork W2025729959 @default.
- W2888573723 hasRelatedWork W2032079927 @default.
- W2888573723 hasRelatedWork W2061285652 @default.
- W2888573723 hasRelatedWork W2362969950 @default.
- W2888573723 hasRelatedWork W2409743377 @default.
- W2888573723 hasRelatedWork W2411583441 @default.
- W2888573723 hasRelatedWork W2888573723 @default.
- W2888573723 hasRelatedWork W3198857158 @default.
- W2888573723 isParatext "false" @default.
- W2888573723 isRetracted "false" @default.
- W2888573723 magId "2888573723" @default.
- W2888573723 workType "article" @default.