2010
DOI: 10.1007/978-3-642-13666-5_85
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Monte Carlo Simulation of Scatter Field for Calculation of Contrast of Discs in Synthetic CDMAM Images

Abstract: Abstract. This paper reports on a further development of an image simulation chain, and in particular, the inclusion of contrast degradation across an image using scatter to primary ratios calculated using Monte Carlo simulation. The Monte Carlo technique, using the Geant4 toolkit, has been implemented to model the scatter conditions when imaging the CDMAM phantom with commercial digital mammography. Observed differences between linear and cellular anti scatter grid are presented and discussed. These results s… Show more

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Cited by 8 publications
(10 citation statements)
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“…The scatter was taken into consideration in the insertion process with the following steps: removal of the estimated local scatter in the clinical image (around the insertion site) to facilitate local adjustment of the primary transmission due to the DLA mass, and then re-instatement of the local scatter 5 (block 5 and 6). The scatter to primary ratio (SPR) was calculated using the validated Monte Carlo model of Diaz et al 14 which is based on the Geant4 toolkit 15 . Finally, the resultant raw mammogram with the inserted mass was processed by the manufacturer's post acquisition image processing package (LORAD FFDM Selenia v 5.0), (block 7).…”
Section: Insertion Of Simulated Masses In 2d Mammogramsmentioning
confidence: 99%
See 1 more Smart Citation
“…The scatter was taken into consideration in the insertion process with the following steps: removal of the estimated local scatter in the clinical image (around the insertion site) to facilitate local adjustment of the primary transmission due to the DLA mass, and then re-instatement of the local scatter 5 (block 5 and 6). The scatter to primary ratio (SPR) was calculated using the validated Monte Carlo model of Diaz et al 14 which is based on the Geant4 toolkit 15 . Finally, the resultant raw mammogram with the inserted mass was processed by the manufacturer's post acquisition image processing package (LORAD FFDM Selenia v 5.0), (block 7).…”
Section: Insertion Of Simulated Masses In 2d Mammogramsmentioning
confidence: 99%
“…The scatter to primary ratio used here was calculated using the validated Monte Carlo Model of Diaz et al 17 for the Hologic Selenia Dimension Tomosynthesis system geometry for a set of breast thicknesses, glandularity and different projection angles. The resulting values were tabulated so that the SPR for any breast thickness, glandularity, and projection angle could be found by interpolation (block 13,14). The manufacturer's reconstruction software was used to reconstruct the tomographic breast image planes from the raw projection images (block 15).…”
Section: Insertion and Reconstructionmentioning
confidence: 99%
“…10 9 photons emerging from a point source at 66cm from the detector have been used for each simulation, irradiating the entire receptor's dimension. Primary and scattered photons were recorded in a region of interest of area 1cm 2 at 6cm from the chest wall and SPR calculated specifically for this study using the methodology described in [12].…”
Section: Mass Insertion Scatter and Processingmentioning
confidence: 99%
“…Typically, conventional two‐dimensional (2D) mammography employs geometrical rejection (i.e., antiscatter grids) to reduce the amount of scattered radiation arriving at the image receptor. In this modelling situation, for a constant thickness phantom, the use of a uniform scatter signal in the central area of the image can be considered . However, most DBT geometries do not include such geometrical rejection and the scatter variation across the projected breast area should be taken into account .…”
Section: Introductionmentioning
confidence: 99%