Comparison of screening full-field digital mammography and digital breast tomosynthesis technical recalls
14TH INTERNATIONAL WORKSHOP ON BREAST IMAGING (IWBI 2018)
Authors: Salkowski, Lonie R.; Elezaby, Mai; Fowler, Amy M.; Burnside, Elizabeth; Woods, Ryan W.; Strigel, Roberta M.
Abstract
The Enhancing Quality Using the Inspection Program (EQUIP) augments the FDA/MQSA program to ensure image quality review and implementation of corrective processes. In our screening mammography program, we compared technical recalls between digital breast tomosynthesis (DBT) and 2D full-field digital mammography (FFDM). This HIPAA-compliant study was exempt from IRB review. In consecutive screening mammograms (October 2013 through December 2017), prospectively recorded technical recalls were compared for imaging modality (FFDM, DBT+FFDM, DBT+synthesized mammography (SynM)), images requested, and indication(s) for technical recall (motion, positioning, technical/artifact). Chi-squared tests evaluated statistical significance between proportions. Of 48,324 screening mammograms, 277 (0.57%) patients were recalled for 360 indications with 371 repeated views. There were significantly less recalls among DBT exams compared to FFDM (X-2 = 25.239; p = 0<0.001). Overall 98 (27.2%) technical recalls were for motion, 192 (53.3%) positioning, and 70 (19.4%) technique/artifacts. Of these, 91 (31.1%) FFDM indications were for motion, 138 (47.1%) positioning, and 64 (21.8%) technique/artifacts. For DBT+FFDM there were 7 (15.6%) for motion, 35 (77.8%) positioning, and 3 (6.7%) technique/artifacts, compared to DBT+SynM with 0 (0%) indications for motion, 19 (86.4%) positioning, and 3 (13.6%) technique/artifacts. There were significant differences in the indications for technical recall prior to and after implementing DBT+SynM (X-2 = 18.719; p<0.001). Technical recalls declined significantly with the inclusion of DBT (SynM/FFDM) as compared to FFDM alone; with recalls for motion demonstrating the greatest decrease. Positioning remains a dominant factor for technical recall regardless of modality, supporting the opportunity for continued technologist education in positioning to decrease technical recalls.
Constraining concrete syntax via metamodel information
IEEE SYMPOSIUM ON VISUAL LANGUAGES AND HUMAN-CENTRIC COMPUTING, PROCEEDINGS
Authors: Bottoni, Paolo; Quattrocchi, Paolo; Ventriglia, Domenico
Abstract
The Syntax Manager (SYNM) for interactive construction of visual rewriting systems allows users to specify visual languages, by compounding the definition of concrete syntax with metalmodel information on the role alphabet elements can play. A concrete rule definition is constrained to comply with the admissible relations for the roles of the elements in it. Hybrid elements can play different roles with respect to different relations.
COA
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