Transcript Fundus Reading Hood - University of Wisconsin

Fundus Reading Hood
Team Members
Leah Brandon (Team Leader)
Adam Dahlen (Communicator)
Sara Worzella (BSAC)
Nathan Kleinhans (BWIG)
Client
Dennis Hafford
Advisor
John G. Webster
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Overview
Problem Statement
Motivation
Background
Product Design Specification
Designs
Decision Matrix
Future Work
Questions
Problem Statement
The goal of this project is to develop a monitor hood
that will block ambient light for the photograph graders at
the Fundus Photograph Reading Center. Determining
problematic sites in retinal scans is used to diagnose
disease states in the eyes. A controlled environment is
necessary for grading in order to assure correct
identification of these sites. Creating a monitor hood will
provide this controlled environment.
Motivation
• Fundus Reading Center Mission:
“strives to further the understanding and treatment
of preventable blindness through interpretation of
ophthalmic images in clinical studies”
Ophthalmic Research
• Ophthalmic Photography is noninvasive
• Parts of the eye photographed:
– Retina
– Retinal vasculature
– Optic nerve head
– Optic discs
• Research Areas:
– Diabetic Retinopathy
– Age-related Macular Degeneration
– Hypertensive Changes of the Retina
– Studies of the Ocular Complications
of AIDS (CMVR)
– Age-related Eye Disease Study
(AREDS).
www.terrymen.demon.co.uk/eyetoey5.htm
Viewing Fundus Photographs
http://www.jhu.edu/wctb/coms/patient/photog/fundus.htm
• Use stereoscope to view photographs on
computer monitor
• Photographs viewed in stereo
• Readers grade photographs
– Adhere to strict protocol for quality of
ophthalmic photographs
• Ambient light is a major concern when viewing
Client Requirements
• Full view of monitor at all times
• Adjustable length of 24 inches
• Removable from the monitor or < 15 inch
fixed length
• Small footprint
• Minimal storage space
Client Requirements Cont.
• Taper to a closed viewing port of
approximately 8 inches by 3.5 inches
• Flexible viewing window
• Adjustable angle of view
• Design flexibility
• 64 lux
Current Monitor Hoods
• Reduce glare and
background light
• Does not block
ambient light
• Not adjustable
• Not compatible with
stereoscope
http://www.photodon.com/mgrh.htm
Alternative Designs
• Rotating Bar
• Solid Interlocking Panels
• Accordion
Rotating Bar Design
• Corner plate with series of 3 bars on each
• Last bar interlocks with bar on opposing side
• Vinyl-like fabric secured around the bar
cage
• Snaps in 3 locations; one for each size monitor
Rotating Bar Design
• Advantages
• Disadvantages
– Flexible to different
monitor sizes
– Slightly cumbersome
setup for client
– Projected cost
– Possible instability
– Ease of storage
Solid Interlocking Panel Design
• Adjustable solid frame provides support for sides
• Solid side panels slide out
• Top/bottom are cloth with multiple sets of snaps
Solid Interlocking Panel Design
• Advantages
• Disadvantages
– Sturdy construction
– Leaves a larger footprint
– Easy depth adjustment
– Front plate may hinder
stereoscope adjustability
– Easy to set up
– Most costly design
Accordion Design
• Retractable Hood
• Elastic Connections Between Corners
• Detachable Viewing Window
Accordion Design
• Advantages
• Disadvantages
– Flexible Storage
– Preparation Time
– Range of Size
– Conflicts with Normal
Viewing
– Simple to Use
Design Matrix*
Criteria
Rotating Bar
Design
Solid Interlocking
Panels Design
Accordion
Design
Ability to Block
Light
3
3
3
Flexibility
4
4
5
Projected Cost
4
2
3
Ease of Storage
4
4
3
Ease of Use for
Client
2
4
3
Ease of
Manufacturing
3.5
2
3.5
Total
20.5
19
20.5
*Scale: 1-5
1: Poor 3: Satisfactory 5: Outstanding
Future Work
• Design Feedback and Modifications
• Research and Materials
– Fabric
– Measurements
• Develop Prototype
References
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ARIC Grading Protocol – Lightbox. Fundus Photograph Reading Center 1998.
21 Sept. 2005.
http://eyephoto.ophth.wisc.edu/ResearchAreas/Hypertension/LBox/LTBXPRO
T_995.html
Fundus Photograph Reading Center. University of Wisconsin-Madison 2001.
21 Sept. 2005. http://eyephoto.ophth.wisc.edu/
Hafford, Dennis. Client Meeting. 15 Sept. 2005.
Hafford, Dennis. Email to Authors. 20 Sept. 2005.
Screen Reflections. Think Pad IBM. 3 Oct. 2005
http://www.pc.ibm.com/ww/healthycomputing/vdt12.html
Timmermeister, Jean. Have You Wondered About How to View Stereo
Images?. PSA Journal. Nov. 2003.
http://www.findarticles.com/p/articles/mi_m1306/is_11_69/ai_110808796.
What They Are and How They Work. Stereo Images from Juneau. 29 Sept.
2005. http://stereo.thurstons.org/stereo_help.htm
Questions?