FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3048775276> ?p ?o ?g. }

• W3048775276 endingPage "1856" @default.
• W3048775276 startingPage "1856" @default.
• W3048775276 abstract "1856 Objectives: The United-Imaging uPMR790 is a clinical integrated whole body Time-of-Flight (TOF) PET/MR scanner from Shanghai United Imaging Healthcare Co. The system is capable of simultaneous PET and MRI acquisition with 450ps time resolution, world’s highest 2.8 mm spatial resolution (at the center of FOV with NEMA standard) and world’s longest 32cm axial field of view. The high definitiondigital PET detector enhances small lesions detectability and improves quantification accuracy by reducing partial volume effect. The long axial coverage provides streamlined whole-body workflow by reducing the total number of bed stations. Only two other whole body simultaneous PET/MR systems had been reported so far due to unique technical challenges such as electromagnetic interference between MRI and PET subsystems. In this work, the United-Imaging uPMR790 was fully evaluated for the first time and the effects of interference from MR operation. Methods: NEMA performance measurement was performed on the newly installed United-Imaging uPMR790 PET/MR scanner at Shanghai Zhongshan hospital. The uPMR790 system comprises a 3T super conducting magnet, a gradient system with a set of second order active shimming coil (50mT/s,200T/m/s), and a 48 channel radio frequency (RF) receiving system. The PET detector system is installed between the gradient coil and body coil. The entire PET ringcomprises 20 modules with a transverse field of view of 60cm and an axial field of view of 32cm. Each module contains 5×14 blocks with 14 blocks along the axial direction. And each block has 4 SiPM detector channels coupled with a 7×8 array of 15.5×2.76×2.76 mm3 LYSO crystals through proprietarydesign of internal light guide. The entire system comprises 112 rings and each ring contains 700 crystalchannels, making 78400 crystal channels in total. The PET system performance was evaluated following the NEMA NU2-2012 standards. Data acquisitionwas performed in the absence and presence of continuous MR pulsing during the entire data acquisition. A two point DIXON sequence, which is the sequence for PET attenuation correction was used. The RF power level was set to 400V, similar to the situation of a normal whole body MR scan. In addition, toevaluate the performance under extreme situations, image quality was tested under an extra set of MR sequences, including Echo Planar Imaging (EPI) and Single Shot Fast Spin Echo (SSFSE). All measurements was conducted at Shanghai Zhongshan Hospital. The system was fully calibrated and a quality assurance test was done before each NEMA measurement. Results: Image quality:MR idleMR pulsing -DIXONMR pulsing -EPIContrast10 mm - hot0.5095100.4896340.494000Recovery13 mm - hot0.6310800.7132100.75480617 mm - hot0.7281500.7029700.71751622 mm - hot0.7152430.7164810.74566328 mm - cold0.7149900.7143940.75109237 mm - cold0.7923710.7779510.830279Lung0.0895600.0918510.086992Background10 mm - hot0.0747850.0895440.092866variability13 mm - hot0.0610330.0765120.07852417 mm - hot0.0487860.0618690.06205422 mm - hot0.0410810.0495830.05018528 mm - cold0.0364180.0406670.04261937 mm - cold0.0298800.0338390.034782Lung0.0348640.0386870.040430Spatial Resolution (FWHM/mm):1cm-X 1cm-Y1cm-Z10cm-X10cm-Y10cm-Z20cm-X20cm-Y20cm-ZMR idle2.852.902.483.153.332.854.845.013.78MR pulsing2.802.972.423.083.332.844.574.643.73Clinical Images:32 케cm 케(a)(b)©Figure 1: Clinical PET/MR Images: (a) Whole body PET (left) and PET/MR fusion image (right), the area between the two blue dot lines represents the axial coverage of one bed position; (b) head & neck PET (up) and PET/MR (down) fusion image © Abdominal PET (up) and PET/MR (down) fusion image Conclusions: NEMA measurement demonstrates consistent ideal image contrast recovery and spatial resolution. Results with MRI pulsing reveal no PET image quality degradation during MR pulsing. The system achieves superior PET/MR imaging quality, fusion accuracy and accelerated workflow in clinical settings." @default.
• W3048775276 created "2020-08-18" @default.
• W3048775276 creator A5047202365 @default.
• W3048775276 creator A5074341326 @default.
• W3048775276 creator A5084681624 @default.
• W3048775276 date "2018-05-01" @default.
• W3048775276 modified "2023-09-27" @default.
• W3048775276 title "NEMA NU2-2012 Performance Measurements of the United-Imaging uPMR790: A HD TOF Simultaneous PET/MR System" @default.
• W3048775276 hasPublicationYear "2018" @default.
• W3048775276 type Work @default.
• W3048775276 sameAs 3048775276 @default.
• W3048775276 citedByCount "0" @default.
• W3048775276 crossrefType "journal-article" @default.
• W3048775276 hasAuthorship W3048775276A5047202365 @default.
• W3048775276 hasAuthorship W3048775276A5074341326 @default.
• W3048775276 hasAuthorship W3048775276A5084681624 @default.
• W3048775276 hasConcept C104293457 @default.
• W3048775276 hasConcept C120665830 @default.
• W3048775276 hasConcept C121332964 @default.
• W3048775276 hasConcept C150627866 @default.
• W3048775276 hasConcept C161694136 @default.
• W3048775276 hasConcept C205372480 @default.
• W3048775276 hasConcept C206480500 @default.
• W3048775276 hasConcept C2779751349 @default.
• W3048775276 hasConcept C2780330291 @default.
• W3048775276 hasConcept C2989005 @default.
• W3048775276 hasConcept C30403606 @default.
• W3048775276 hasConcept C62520636 @default.
• W3048775276 hasConcept C71924100 @default.
• W3048775276 hasConcept C94915269 @default.
• W3048775276 hasConceptScore W3048775276C104293457 @default.
• W3048775276 hasConceptScore W3048775276C120665830 @default.
• W3048775276 hasConceptScore W3048775276C121332964 @default.
• W3048775276 hasConceptScore W3048775276C150627866 @default.
• W3048775276 hasConceptScore W3048775276C161694136 @default.
• W3048775276 hasConceptScore W3048775276C205372480 @default.
• W3048775276 hasConceptScore W3048775276C206480500 @default.
• W3048775276 hasConceptScore W3048775276C2779751349 @default.
• W3048775276 hasConceptScore W3048775276C2780330291 @default.
• W3048775276 hasConceptScore W3048775276C2989005 @default.
• W3048775276 hasConceptScore W3048775276C30403606 @default.
• W3048775276 hasConceptScore W3048775276C62520636 @default.
• W3048775276 hasConceptScore W3048775276C71924100 @default.
• W3048775276 hasConceptScore W3048775276C94915269 @default.
• W3048775276 hasLocation W30487752761 @default.
• W3048775276 hasOpenAccess W3048775276 @default.
• W3048775276 hasPrimaryLocation W30487752761 @default.
• W3048775276 hasRelatedWork W152339086 @default.
• W3048775276 hasRelatedWork W170631969 @default.
• W3048775276 hasRelatedWork W2021487030 @default.
• W3048775276 hasRelatedWork W2277465583 @default.
• W3048775276 hasRelatedWork W2395519042 @default.
• W3048775276 hasRelatedWork W2532017882 @default.
• W3048775276 hasRelatedWork W2544463190 @default.
• W3048775276 hasRelatedWork W2544999270 @default.
• W3048775276 hasRelatedWork W2546228807 @default.
• W3048775276 hasRelatedWork W2613841560 @default.
• W3048775276 hasRelatedWork W2754064880 @default.
• W3048775276 hasRelatedWork W2889527096 @default.
• W3048775276 hasRelatedWork W2896705020 @default.
• W3048775276 hasRelatedWork W2897535565 @default.
• W3048775276 hasRelatedWork W2955532814 @default.
• W3048775276 hasRelatedWork W3120994277 @default.
• W3048775276 hasRelatedWork W3163208773 @default.
• W3048775276 hasRelatedWork W866107804 @default.
• W3048775276 hasRelatedWork W89711890 @default.
• W3048775276 hasRelatedWork W2185882513 @default.
• W3048775276 hasVolume "59" @default.
• W3048775276 isParatext "false" @default.
• W3048775276 isRetracted "false" @default.
• W3048775276 magId "3048775276" @default.
• W3048775276 workType "article" @default.