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Low-Cost Fundus Camera Detailed Design Review Low-Cost Fundus Camera Detailed Design Review

Low-Cost Fundus Camera Detailed Design Review - PowerPoint Presentation

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Low-Cost Fundus Camera Detailed Design Review - PPT Presentation

Project Background A fundus camera is used to photograph the retina to provide information about a patients eye Diabetic retinopathy is a complication associated with diabetes eventually leading to blindness ID: 779356

design housing camera requirements housing design requirements camera odroid central team mechanical part fundus instruments lens stand fda general

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Presentation Transcript

Slide1

Low-Cost Fundus Camera

Detailed Design Review

Slide2

Project Background

A fundus camera is used to photograph the retina to provide information about a patient's eye.

Diabetic retinopathy is a complication associated with diabetes, eventually leading to blindness.

Most people will only see a specialist after damage to the retina has occurred

Used exclusively in an Opthamologist's office

With proper care, patients with retinopathy can reduce their risk of blindness by 95%.

Typically very expensive and heavy

Slide3

Problem Statement

Due to the need for pupil dilation, specialized camera equipment, staff, and facilities, diabetic patients often do not receive regular screenings.

By creating a low-cost, portable, and easy to use fundus camera, screening for retinopathy in diabetic patients can be performed by a general practitioner.

Slide4

Software

Linux distribution - Ubuntu

Embedded program written in Python and Java

Python for opening communication ports, and control

Java for implementing active video filters and noise reduction.

60Hz flicker filter can be implemented in both

GUI written in Java

Slide5

Hardware

ODROID XU-4

ODROID-VU7 (7 inch screen)

See3CAM

Solid State Drive

8Gb eMMC

Slide6

Hardware - ODROID-VU7

Slide7

Hardware - ODROID-VU7

Slide8

Mechanical Base

Preconstructed Base

provided by Prof. Sisson

FDA - approved

Allows for large and fine movements

Commercially available

Slide9

Controls

The X and Z axis are controlled using a joystick for fine movements and a loose base for large movements.

The Y axis is controlled by a dial connected to a screw allowing for fine movements.

The X axis can be locked by tightening a thumb screws.

Slide10

Additional Mechanical Design (Central housing)

The central stand will hold a detachable component which will hold:

ODROID-C processor (Green)

ODROID-VU7 7in Screen (Black)

See3CAM (Yellow)

Solid State Drive (Blue)

Lens housing (Yellow)

Slide11

Additional Mechanical Design (Lens housing)

By modifying a film based fundus camera we achieve:

Has a proven lens structure.

Has a dated but optically sound lighting system.

This will require:

Integrate sensor at correct distance.

Replace dated electrical lighting components with LED system.

Slide12

Mechanical Design Risk analysis

Stand is unsecured and is unstable while in transport causing difficulties in portability.

Will make Central housing separable allowing them to be transported separately.

Team does not own design for stand

Central housing attachment to stand will be made adaptable.

Lens housing was recovered from an old device.

Will make CAD diagrams of the housing to insure ability to duplicate final design.

Slide13

Illumination and Flash

Kowa RC-2

Xenon bulb

Infrared lighting required to align camera

with pupil while avoiding dilation

Slide14

Kowa RC-2 Illumination

Diagram of Kowa RC-R retinal camera produced to image a rat’s eye.

Shows use of a hole mirror (HM), xenon light source (Xe LS), liquid light guide (LLG), source ring (SR), and green filter (GF).

Xe light source requires 10W

Replace with LEDs?

https://www.osapublishing.org/boe/fulltext.cfm?uri=boe-2-11-3094

Slide15

FDA Requirements

Must conform to:

ISO 10940: 2009 Ophthalmic instruments - Fundus cameras

IEC 60601-1:2005 Medical Electrical Equipment – Part 1: General Requirements for Basic Safety and Essential Performance

IEC 60601-1-2 Medical Electrical Equipment – Part 1-2: General Requirements for Basic Safety and Essential Performance: Collateral Standard: Electromagnetic Capability – Requirements and Tests;

ISO 15004-1:2006 Ophthalmic instruments – Fundamental requirements and test methods – Part 1: General requirements applicable to all ophthalmic instruments

ISO 15004-2:2007 Ophthalmic Instruments – Fundamental requirements and test methods – Part 2: Light hazard protection

Slide16

Form FDA 3654

Form used to ensure compliance standards have been met.

Checks that standards match regulations

Slide17

Form

FDA

3654

Slide18

Current BOM

Slide19

BOM of Previous Team’s Materials

Slide20

Additional Items

Slide21

Budget Overview

P16590- MSD I

P15590

Prototype Approximate Part Cost

Budget

Purchased

% Budget Spent

$2000

$445.63

22.3%

Purchased

$2087.99

Item Cost

$973.19

Slide22

End of Semester Overview

Task

Assigned To

Due Date

Go over design review notes, create new action items if necessary

Team

12/10/2015

Put out any extra purchase requests

Team

12/10/2015

Gate review

Team

12/11/2015

Go over gate review notes

Team

12/11/2015

Design central mechanical housing

Matt

TBD

Load kernel

Cecelia

TBD