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Investigation of th...
Investigation of the effect of varying scatter-to-primary ratios on nodule contrast in chest tomosynthesis
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- Svalkvist, Angelica (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kliniska vetenskaper, Avdelningen för radiofysik,Institute of Clinical Sciences, Department of Radiation Physics
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- Ullman, Gustaf (författare)
- Linköpings universitet,Medicinsk radiofysik,Hälsouniversitetet,Department of Cell and Molecular Biology, Uppsala University, Uppsala, Sweden
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- Håkansson, Markus (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kliniska vetenskaper, Avdelningen för radiofysik,Institute of Clinical Sciences, Department of Radiation Physics
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- Dance, David R. (författare)
- NCCPM, Royal Surrey County Hospital, Guildford , UK
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- Sandborg, Michael, 1961- (författare)
- Östergötlands Läns Landsting,Linköpings universitet,Medicinsk radiofysik,Centrum för medicinsk bildvetenskap och visualisering,Hälsouniversitetet,Radiofysikavdelningen US
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- Alm Carlsson, Gudrun (författare)
- Östergötlands Läns Landsting,Linköpings universitet,Medicinsk radiofysik,Hälsouniversitetet,Radiofysikavdelningen US
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- Båth, Magnus, 1974 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kliniska vetenskaper, Avdelningen för radiofysik,Institute of Clinical Sciences, Department of Radiation Physics
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(creator_code:org_t)
- SPIE - International Society for Optical Engineering, 2011
- 2011
- Engelska.
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Ingår i: Medical Imaging 2011. - : SPIE - International Society for Optical Engineering. - 9780819485038 ; 7961
- Relaterad länk:
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https://liu.diva-por... (primary) (Raw object)
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http://liu.diva-port...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://gup.ub.gu.se...
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Abstract
Ämnesord
Stäng
- The primary aim of the present work was to analyze the effects of varying scatter-to-primary ratios on the appearance of simulated nodules in chest tomosynthesis section images. Monte Carlo simulations of the chest tomosynthesis system GE Definium 8000 VolumeRAD (GE Healthcare, Chalfont St. Giles, UK) were used to investigate the variation of scatter-to-primary ratios between different angular projections. The simulations were based on a voxel phantom created from CT images of an anthropomorphic chest phantom. An artificial nodule was inserted at 80 different positions in the simulated phantom images, using five different approaches for the scatter-to-primary ratios in the insertion process. One approach included individual determination of the scatter-to primary-ratio for each projection image and nodule location, while the other four approaches were using mean value, median value and zero degree projection value of the scatter-to-primary ratios at each nodule position as well as using a constant scatter-to-primary ratio of 0.5 for all nodule positions. The results indicate that the scatter-to-primary ratios vary up to a factor of 10 between the different angular tomosynthesis projections (±15°). However, the error in the resulting nodule contrast introduced by not taking all variations into account is in general smaller than 10 %.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)
Nyckelord
- TSYN
- XIM
- Radiological physics
- Radiofysik
- TSYN
- XIM
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