FUNDU S REA

DING HOOD

CLIENT: CLIENT: Dennis Hafford Research Specialist Fundus Reading Center

ADVISOR: ADVISOR: John G. Webster, Ph. D. Department of Biomedical Engineering

TEAM MEMBERS: TEAM MEMBERS: Leah Brandon, Adam Dahlen, Nate Kleinhans, Sara Worzella

ABSTRACT In the grading of retina scans at the Fundus Photograph Reading Center, normal office light interferes with the graders ability to efficiently identify lesions and other problematic sites on the retina that are indicative of certain diseases. Since these lesions are often very small, a controlled environment is necessary for grading in order to assure correct identification of these sites. The design of a monitor hood that blocks ambient light is the key element in obtaining accurate grading of retina scans.

MOTIVATION Design a reading hood for ophthalmic photograph readers at Fundus Reading Center Block ambient light Provide a controlled environment to grade photographs

OPHTHALMIC RESEARCH Problematic sites in retinal scans used to diagnose disease states in eyes Parts of the eye photographed: –Retina –Retinal Vasculature –Optic Nerve Head

VIEWING IMAGES Stereoscopes used to grade photographs Graders adhere to strict protocol for quality of photographs Ambient light interferes with grading Current hoods not adjustable or compatible with stereoscope

Retinal scans like these are viewed in stereo and used to determine illnesses. This is an example of a stereoscope used to view ophthalmic images.

DESIGN CRITERIA Full view of monitor at all times Adjustable length of 60.96cm Removable from monitor or < 38.1cm fixed length Small rear footprint Tapered viewing window x 8.89cm Adjustable angle of view Interior light intensity < 64 lux

DESIGN MATRIX CriteriaRotating Bar Design Solid Interlocking Panels Design Accordio n Design Ability to Block Light 333 Flexibility445 Projected Cost423 Ease of Storage443 Ease of multiple Use for Client 243 Ease of Manufacturing 3.52 Total *Scale: 1-5 1: Poor 3: Satisfactory 5: Outstanding

FINAL DESIGN Extendable Rods Corner Brackets Adjustable Straps Suraline Hood Support Blocks

Cost ItemPrototype Cost (2) 1/4” X 2” X 36 “ Steel Plate ’ black Velcro1.99 Black Thread1.99 Suraline Fabric10.98 Black Corse Elastic1.98 (5) RC Antenna29.95 Plastic Steel Epoxy3.99 (4) 3/4” Steel Cubes1.00 Screws and Washers2.38 (4) D-Rings2.20 Nylon Straps2.82 Fray Sealer3.69 Total81.93 ItemProduction Costs (2) 1/8” X 2” X 36“ Steel Plate ’ Black Velcro1.99 Black Thread1.99 Suraline Fabric13.23 Ripstop Nylon8.58 Deco Fabric15.95 Black Corse Elastic1.98 (5) RC Antenna29.95 Plastic Steel Epoxy3.99 1/4” X 2” X 36” Steel Plate4.77 1/4” X 2” X 36” Steel Angle Gauge14.77 (4) 3/4” Steel Cubes1.00 Screws and Washers2.38 (4) D-Rings2.20 Nylon Straps2.82 Fray Sealer3.69 Total Tax7.04 Total135.29

FUTURE WORK Additional support at the front of the main hood Space efficient design Angle extension pieces Light weight fabric Stabilize corner pieces Reduce rear light penetration

ACKNOWLEDGEMENTS The authors would like to thank Professor John Webster, Dennis Hafford, Troy Grams, and the machine shop staff for their helpful assistance.

REFERENCES ARIC Grading Protocol – Lightbox. Fundus Photograph Reading Center Sept /LTBXPROT_995.html Baldridge, Aimee. Get the Picture: Digital Imaging Notes From The Field. 15 Nov CNET. 21 Sept Ergonomic Standards. International Ergonomics Association. 22 Sept Fundus Photograph Reading Center. University of Wisconsin-Madison Sept Hafford, Dennis. Client Meeting. 15 Sept Hafford, Dennis. to Authors. 20 Sept United States Patent and Trademark Office. USPTO Site. 19 Sept What They Are and How They Work. Stereo Images from Juneau. 29 Sept

CORNER BRACKET: SIDE VIEW

FRONT HOOD ATTACHMENT

VELCRO STRAP ASSEMBLY

CORNER BRACKET: SIDE VIEW

EXTENDABLE ROD