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Digital Breast Tomosynthesis: Future of visualization MIIT – 2013 Toronto Ketan Thanki 5/24/2013MIIT 2013.

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Presentation on theme: "Digital Breast Tomosynthesis: Future of visualization MIIT – 2013 Toronto Ketan Thanki 5/24/2013MIIT 2013."— Presentation transcript:

1 Digital Breast Tomosynthesis: Future of visualization MIIT – 2013 Toronto Ketan Thanki 5/24/2013MIIT 2013

2 FFDM Vs DBT Full Field Digital Mammography Single Frame images Conventional Data sets Established workflow Digital Breast Tomosysnthesis Multi-Frame image stacks Larger Data sets Intensive workflow: dynamic browsing through image stacks 2

3 Visualization challenges of DBT study Limitation of LCD response & cine through multiple images 1 Detection probability while scrolling through slices 2 Workflow & Time to interpret 3 3

4 4 Limitation of LCD response & cine through multiple images 1 LCD Response time deceiving Large Variations in transition times 2-3 Frames to refresh Result: Blurring 20ms of Frame time 50+ ms of transition time

5 5 Blurring on traditional FFDM display during cine

6 6 Detection probability while scrolling through slices 2 [Lia06] Temporal Response Measurements of Medical Liquid Crystal Displays, Hongye Liang and Aldo Badano, SPIE medical Imaging 2006 Slow average transition times Blurring when browsing through image stack Result: Masking of subtle image features Eg. On a typical 5 MegaPixel medical display, the fastest transition is +/- 15ms while the slowest transition requires 150ms (more than 10 display frames) to complete (source: [Lia06])

7 7 Subtle details during cine

8 8 Workflow & Time to interpret 3 Flicker… Pan/Zoom Freeze & focus… Magnify (Continuous zoom) Slow fading… Toggle comparison

9 Some Technologies 9

10 Rapidframe 10 Blurring during cineSmooth cine

11 Rapidframe Clinical pilot results: 11 Browsing speed: 25 slices/second 10% higher AUC compared to FFDM display Statistically significant

12 Ultra high luminance 12 x2 x1

13 Ultra-high Luminance: PACS display = 500 cd/m2 PACS display = 500 cd/m2 Tomo display = 1000cd/m2 “Hot light”= 2000 cd/m2 13 Hot Light tool Temporary boost for subtle details

14 JNDs: Visible shades of gray 14 Hot Light tool Temporary boost for subtle details

15 Quantification of Detection Probability of Microcalcifications at Increased Display Luminance Levels 15

16 Tomosynthesis Displays: Three factors for efficient reading time and accuracy 16 Cine without blur technology Ultra-high luminance with “Hot light” for subtle details Display controller with enough memory to hold large stacks of images 10-bit imaging:Synchronized to display refresh rate & frame rate

17 References  Medical Display optimized for Digital Breast Tomosynthesis ▫ T Kimpe, MS, Kortrijk, _ BEL; A Xthona; C Marchessoux  Quantification of Detection Probability of Micro-calcifications at Increased Display Luminance Levels ▫ Tom R.L. Kimpe and Albert Xthona  Multimodality breast imaging using RapidFrame™ ▫ Albert Xthona 17


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