T1 - Monte Carlo simulation of breast tomosynthesis: visibility of microcalcifications at different acquisition schemes In conclusion, none of the evaluated acquisition schemes were found to yield higher SDNR or depth resolution for the simulated microcalcifications than the standard acquisition scheme.", The ASFW was found to decrease (meaning an increase in depth resolution) with wider angular range. The acquisition schemes with very high central dose yielded significantly lower SDNR than the schemes with more uniform dose distributions. To compare the visibility and depth resolution of the microcalcifications, signal difference to noise ratio (SDNR) and artifact spread function width (ASFW) were calculated. For comparison purposes, the volume of the standard acquisition scheme (50 degrees angular range and uniform projection and dose distribution) was also reconstructed using standard filtered backprojection (FBP). Image volumes were reconstructed using the novel method super-resolution reconstruction with statistical artifact reduction (SRSAR). The simulation procedure was based on analytical ray tracing to produce primary images, Monte Carlo to simulate scatter contributions and flatfield image acquisitions to model system characteristics.
Statistical artifact meaning software#
Microcalcifications were inserted randomly in a high resolution software phantom and a simulation procedure was used to model a MAMMOMAT Inspiration BT system. The purpose of this work was to investigate the influence of acquisition schemes with different angular ranges, projection distributions and dose distributions on the visibility of microcalcifications in reconstructed BT volumes. To achieve optimal conditions for detection of microcalcifications in BT imaging, different acquisition geometries should be evaluated. In conclusion, none of the evaluated acquisition schemes were found to yield higher SDNR or depth resolution for the simulated microcalcifications than the standard acquisition scheme.Ībstract = "Microcalcifications are one feature of interest in mammography and breast tomosynthesis (BT).
Microcalcifications are one feature of interest in mammography and breast tomosynthesis (BT).
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