Matches in SemOpenAlex for { <https://semopenalex.org/work/W2036700088> ?p ?o ?g. }
Showing items 1 to 50 of
50
with 100 items per page.
- W2036700088 endingPage "404" @default.
- W2036700088 startingPage "404" @default.
- W2036700088 abstract "Purpose: Significant anomalies in scanner reported values of CTDIvol for stationary table protocols (with aberrant, elevated values of CTDIvol up to 300 % higher than the actual dose to the phantom), have been observed; well beyond the typical accuracy expected of CTDIvol as a phantom dose. Recognition of these outliers as bad data is important to users of CT dose index tracking systems (e.g. ACR DIR), and a method for recognition and correction is provided. A second anomaly is that the reported CTDIvol for automatic tube current modulation (TCM) has a different physical meaning from the traditional CTDIvol at constant mA, resulting in the dichotomy CTDIvol of the first and second kinds. Methods: Rigorous equations are derived to describe the accumulated dose distributions for auto TCM and for stationary table CT. A comparison with formulae for scanner reported values of CTDIvol clearly identifies the source of these anomalies. Results: For the stationary table, use of the CTDI100 formula (applicable to a moving phantom only) generates extra scatter and an over beaming correction, both of which are non existent if the phantom is held stationary. It is shown that CTDIvol is not robust between fixed mA and auto TCM in this case only DLP is robust. Conclusion: For the case of a stationary phantom, correction of CTDI100 prior to its use in the calculation of CTDIvol using the approach to equilibrium formula H(a) serves as a method of recognition of bad data and as a correction factor for same. In the case of auto TCM, the use of CTDIvol is compromised, and an alternative (approximate) physical interpretation is suggested. However, the reported DLP value (integral dose) remains robust between the fixed and auto mA modes." @default.
- W2036700088 created "2016-06-24" @default.
- W2036700088 creator A5072645800 @default.
- W2036700088 creator A5083137178 @default.
- W2036700088 date "2013-06-01" @default.
- W2036700088 modified "2023-09-26" @default.
- W2036700088 title "MO-D-134-11: Anomalous Scanner-Reported Values of CTDIvol" @default.
- W2036700088 doi "https://doi.org/10.1118/1.4815269" @default.
- W2036700088 hasPublicationYear "2013" @default.
- W2036700088 type Work @default.
- W2036700088 sameAs 2036700088 @default.
- W2036700088 citedByCount "0" @default.
- W2036700088 crossrefType "journal-article" @default.
- W2036700088 hasAuthorship W2036700088A5072645800 @default.
- W2036700088 hasAuthorship W2036700088A5083137178 @default.
- W2036700088 hasConcept C104293457 @default.
- W2036700088 hasConcept C154945302 @default.
- W2036700088 hasConcept C2779751349 @default.
- W2036700088 hasConcept C2989005 @default.
- W2036700088 hasConcept C41008148 @default.
- W2036700088 hasConcept C71924100 @default.
- W2036700088 hasConcept C79337645 @default.
- W2036700088 hasConceptScore W2036700088C104293457 @default.
- W2036700088 hasConceptScore W2036700088C154945302 @default.
- W2036700088 hasConceptScore W2036700088C2779751349 @default.
- W2036700088 hasConceptScore W2036700088C2989005 @default.
- W2036700088 hasConceptScore W2036700088C41008148 @default.
- W2036700088 hasConceptScore W2036700088C71924100 @default.
- W2036700088 hasConceptScore W2036700088C79337645 @default.
- W2036700088 hasIssue "6Part24" @default.
- W2036700088 hasLocation W20367000881 @default.
- W2036700088 hasOpenAccess W2036700088 @default.
- W2036700088 hasPrimaryLocation W20367000881 @default.
- W2036700088 hasRelatedWork W1879068677 @default.
- W2036700088 hasRelatedWork W1969509093 @default.
- W2036700088 hasRelatedWork W2028479310 @default.
- W2036700088 hasRelatedWork W2041944022 @default.
- W2036700088 hasRelatedWork W2044788131 @default.
- W2036700088 hasRelatedWork W2048461778 @default.
- W2036700088 hasRelatedWork W2278404601 @default.
- W2036700088 hasRelatedWork W2463927481 @default.
- W2036700088 hasRelatedWork W3209054720 @default.
- W2036700088 hasRelatedWork W96407372 @default.
- W2036700088 hasVolume "40" @default.
- W2036700088 isParatext "false" @default.
- W2036700088 isRetracted "false" @default.
- W2036700088 magId "2036700088" @default.
- W2036700088 workType "article" @default.