Vision of the Future

Report
Digital Breast Tomosynthesis:
Future of visualization
MIIT – 2013 Toronto
Ketan Thanki
5/24/2013
MIIT 2013
2
• Single Frame
images
• Conventional
Data sets
• Established
workflow
Digital Breast Tomosysnthesis
Full Field Digital Mammography
FFDM Vs DBT
• Multi-Frame
image stacks
• Larger Data
sets
• Intensive
workflow:
dynamic
browsing
through image
stacks
Visualization challenges of DBT study
Limitation of LCD response &
cine through multiple images
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2
3
3
Detection probability while
scrolling through slices
Workflow & Time to interpret
1
Limitation of LCD response &
cine through multiple images
LCD Response time
deceiving
Large Variations in
transition times
2-3 Frames to
refresh
Result: Blurring
4
20ms of
Frame time
50+ ms of
transition time
Blurring on traditional FFDM display during cine
5
2
Detection probability while
scrolling through slices
[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
6
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])
Subtle details during cine
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3
Workflow & Time to interpret
Pan/Zoom
Magnify
(Continuous
zoom)
Toggle
comparison
8
• Flicker…
• Freeze & focus…
• Slow fading…
Some Technologies
9
Rapidframe
Blurring during cine
10
Smooth cine
Rapidframe Clinical pilot results:
Browsing speed: 25
slices/second
10% higher AUC
compared to FFDM
display
Statistically
significant
11
x2
Ultra high
luminance
x1
12
Ultra-high Luminance:
PACS display
= 500 cd/m2
Tomo display
= 1000cd/m2
“Hot light”=
2000 cd/m2
Hot Light tool
Temporary boost
for subtle details
13
JNDs: Visible shades of gray
Hot Light tool
Temporary boost
for subtle details
14
Quantification of Detection Probability
of Microcalcifications at Increased Display
Luminance Levels
15
Tomosynthesis Displays:
Three factors for efficient reading time and
accuracy
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
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References
Medical Display optimized for Digital Breast Tomosynthesis

▫
Quantification of Detection Probability of Micro-calcifications at
Increased Display Luminance Levels

▫
Tom R.L. Kimpe and Albert Xthona
Multimodality breast imaging using RapidFrame™

▫
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T Kimpe, MS, Kortrijk, _ BEL; A Xthona; C Marchessoux
Albert Xthona

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