研究目的
To develop a new method for generating synthesized mammogram (SM) from digital breast tomosynthesis (DBT) and to assess its potential as an adjunct to DBT.
研究成果
The SM generated by the proposed method has superior conspicuity for microcalcifications and comparable BI-RADS assessments to FFDM, but degraded conspicuity for masses. It may be useful for prescreening microcalcifications in DBT, but DBT should be used for mass detection and characterization.
研究不足
The sample size is limited; the method was applied to DBT from a specific prototype system and reconstruction technique; enhancement parameters were not exhaustively evaluated; the reader study focused on image quality comparison rather than detection performance.
1:Experimental Design and Method Selection:
The method involves applying multiscale bilateral filtering to reconstructed DBT slices to enhance high-frequency features and reduce noise, generating a maximum intensity projection (MIP) image from high-frequency components, and using a multiscale image fusion method to combine the MIP image and the central DBT projection view into an SM.
2:Sample Selection and Data Sources:
A data set of 56 cases with DBT and corresponding FFDM views was collected retrospectively, including 68 grouped microcalcifications and 48 masses.
3:List of Experimental Equipment and Materials:
A GE second generation prototype DBT system with a CsI phosphor/a:Si active matrix flat panel digital detector, EIZO SMD 21500 D display monitors, and in-house developed software for image processing and display.
4:Experimental Procedures and Operational Workflow:
DBT slices were reconstructed using simultaneous algebraic reconstruction technique (SART), processed with multiscale bilateral filtering and Laplacian pyramid decomposition, and fused with projection views. A reader study was conducted with three MQSA radiologists assessing image quality and BI-RADS assessments.
5:Data Analysis Methods:
Student's two-tailed paired t-tests were used to estimate statistical significance in visual differences between SM and FFDM.
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