FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2043934155> ?p ?o ?g. }

• W2043934155 endingPage "4058" @default.
• W2043934155 startingPage "4047" @default.
• W2043934155 abstract "Purpose: A new concept of indirect conversion flat-panel imager with avalanche gain and field emitter array (FEA) readout is being investigated. It is referred to as scintillator avalanche photoconductor with high resolution emitter readout (SAPHIRE). The present work investigates the temporal performance, i.e., lag, of SAPHIRE. Methods: Since the temporal performance of the x-ray detection materials, i.e., the structured scintillator and avalanche amorphous selenium photoconductor, has been studied previously, the investigation is focused on lag due to the FEA readout method. The principle of FEA readout is similar to that of scanning electron beam readout used in camera tubes, where the dominant source of lag is the energy spread of electrons. Since the principles of emission and beam focusing methods for FEA are different from thermionic emission used in camera tubes, its electron beam energy spread and hence lag is expected to be different. In the present work, the energy spread of the electrons emitted from a FEA was investigated theoretically by analyzing different contributing factors due to the FEA design and operations: The inherent energy spread of field emission, the FEA driving pulse delay, and the angular distribution of emitted electrons. The electron energy spread determined the beam acceptance characteristic curve of the photoconductive target, i.e., the accepted beam current as a function of target potential , from which lag could be calculated numerically. Lag calculation was performed using FEA parameters of two prototype HARP-FEA image sensors, and the results were compared with experimental measurements. Strategies for reducing lag in SAPHIRE were proposed and analyzed. Results: The theoretical analysis shows that the dominant factor for lag is the angular distribution of electrons emitted from the FEA. The first frame lags for two prototype sensors with 4 and HARP layer thicknesses were 62.1% and 9.1%, respectively. A lag clearance procedure can be implemented by turning on all the FEA pixels simultaneously between subsequent frames without negative impact of readout speed. For large-area SAPHIRE, the bias electrode for the HARP needs to be divided into strips to allow parallel readout. With typical cardiac detector parameters, SAPHIRE with 128 parallel strips can provide real-time readout (30 frames/s) with first frame lag of . Conclusions: The investigation of lag in SAPHIRE shows that the angular distribution of emitted electrons from FEA can result in substantial lag if the readout was performed pixel by pixel. Effective strategies for reducing lag include dividing the bias electrode into multiple strips to allow parallel readout and the incorporation of rapid charge clearance procedure between subsequent frames or rows." @default.
• W2043934155 created "2016-06-24" @default.
• W2043934155 creator A5013112512 @default.
• W2043934155 creator A5038851564 @default.
• W2043934155 creator A5072003003 @default.
• W2043934155 creator A5083956431 @default.
• W2043934155 date "2009-08-12" @default.
• W2043934155 modified "2023-10-02" @default.
• W2043934155 title "Scintillator avalanche photoconductor with high resolution emitter readout for low dose x-ray imaging: Lag" @default.
• W2043934155 cites W1965019034 @default.
• W2043934155 cites W1969996168 @default.
• W2043934155 cites W1976748182 @default.
• W2043934155 cites W1979885326 @default.
• W2043934155 cites W1991217501 @default.
• W2043934155 cites W1994016717 @default.
• W2043934155 cites W2001140031 @default.
• W2043934155 cites W2003369156 @default.
• W2043934155 cites W2023946773 @default.
• W2043934155 cites W2035629184 @default.
• W2043934155 cites W2041704044 @default.
• W2043934155 cites W2042482582 @default.
• W2043934155 cites W2044269888 @default.
• W2043934155 cites W2045254871 @default.
• W2043934155 cites W2045345542 @default.
• W2043934155 cites W2056048206 @default.
• W2043934155 cites W2059214102 @default.
• W2043934155 cites W2059368024 @default.
• W2043934155 cites W2088133609 @default.
• W2043934155 cites W2094481863 @default.
• W2043934155 cites W2114070471 @default.
• W2043934155 cites W2136949500 @default.
• W2043934155 cites W2156256714 @default.
• W2043934155 cites W2161606023 @default.
• W2043934155 cites W4211037856 @default.
• W2043934155 cites W4235233140 @default.
• W2043934155 doi "https://doi.org/10.1118/1.3187227" @default.
• W2043934155 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2738744" @default.
• W2043934155 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19810477" @default.
• W2043934155 hasPublicationYear "2009" @default.
• W2043934155 type Work @default.
• W2043934155 sameAs 2043934155 @default.
• W2043934155 citedByCount "2" @default.
• W2043934155 countsByYear W20439341552014 @default.
• W2043934155 countsByYear W20439341552021 @default.
• W2043934155 crossrefType "journal-article" @default.
• W2043934155 hasAuthorship W2043934155A5013112512 @default.
• W2043934155 hasAuthorship W2043934155A5038851564 @default.
• W2043934155 hasAuthorship W2043934155A5072003003 @default.
• W2043934155 hasAuthorship W2043934155A5083956431 @default.
• W2043934155 hasBestOaLocation W20439341552 @default.
• W2043934155 hasConcept C102637530 @default.
• W2043934155 hasConcept C109679912 @default.
• W2043934155 hasConcept C120665830 @default.
• W2043934155 hasConcept C121029787 @default.
• W2043934155 hasConcept C121332964 @default.
• W2043934155 hasConcept C147120987 @default.
• W2043934155 hasConcept C161694136 @default.
• W2043934155 hasConcept C168834538 @default.
• W2043934155 hasConcept C2778347521 @default.
• W2043934155 hasConcept C46918542 @default.
• W2043934155 hasConcept C49040817 @default.
• W2043934155 hasConcept C62520636 @default.
• W2043934155 hasConcept C94915269 @default.
• W2043934155 hasConcept C95312477 @default.
• W2043934155 hasConceptScore W2043934155C102637530 @default.
• W2043934155 hasConceptScore W2043934155C109679912 @default.
• W2043934155 hasConceptScore W2043934155C120665830 @default.
• W2043934155 hasConceptScore W2043934155C121029787 @default.
• W2043934155 hasConceptScore W2043934155C121332964 @default.
• W2043934155 hasConceptScore W2043934155C147120987 @default.
• W2043934155 hasConceptScore W2043934155C161694136 @default.
• W2043934155 hasConceptScore W2043934155C168834538 @default.
• W2043934155 hasConceptScore W2043934155C2778347521 @default.
• W2043934155 hasConceptScore W2043934155C46918542 @default.
• W2043934155 hasConceptScore W2043934155C49040817 @default.
• W2043934155 hasConceptScore W2043934155C62520636 @default.
• W2043934155 hasConceptScore W2043934155C94915269 @default.
• W2043934155 hasConceptScore W2043934155C95312477 @default.
• W2043934155 hasFunder F4320332161 @default.
• W2043934155 hasIssue "9Part1" @default.
• W2043934155 hasLocation W20439341551 @default.
• W2043934155 hasLocation W20439341552 @default.
• W2043934155 hasLocation W20439341553 @default.
• W2043934155 hasLocation W20439341554 @default.
• W2043934155 hasOpenAccess W2043934155 @default.
• W2043934155 hasPrimaryLocation W20439341551 @default.
• W2043934155 hasRelatedWork W1513447881 @default.
• W2043934155 hasRelatedWork W1798060812 @default.
• W2043934155 hasRelatedWork W1972125082 @default.
• W2043934155 hasRelatedWork W1982613021 @default.
• W2043934155 hasRelatedWork W2018664233 @default.
• W2043934155 hasRelatedWork W2141325066 @default.
• W2043934155 hasRelatedWork W2144972815 @default.
• W2043934155 hasRelatedWork W2387039515 @default.
• W2043934155 hasRelatedWork W2986990048 @default.
• W2043934155 hasRelatedWork W66821471 @default.
• W2043934155 hasVolume "36" @default.
• W2043934155 isParatext "false" @default.

• next