human interface technology lab

Medical Applications of VR

Suzanne Weghorst

Human Interface Technology Lab

University of Washington

human interface technology lab

HIT Lab Medical Projects

• broad spectrum of medical applications• tools for clinical practice• medical informatics• therapeutic VR/AR• surgical simulation

• www.hitl.washington.edu

• Medicine Meets VR (www.amainc.com)

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Virtual Retinal Display

• high resolution• bright enough for see-

through display• small “exit pupil”

produces long depth of focus

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Optical Tools for Medicine

• True 3D display (Furness/Seibel)

• scanned fiber endoscope (Seibel)

• optical tomography (Seibel)

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Medical Informatics

• virtual ER• distributed tumor

board• virtual anatomy

browser (Campbell)

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Therapeutic Uses of VR

• pain distraction• phobia desensitization• perceptual prosthesis

(e.g. Parkinson’s Disease)

Meredith Bricken, 1990

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Parkinson’s Disease

Kinesia Paradoxa• objects/lines in the

subject’s path• transverse lines spaced

about one stride-length apart work best

• learning/imagining cues doesn’t work

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Virtual Vision Sport

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Surgical Simulation

• suturing simulation using FFE (fast finite element) methods

• ESS (endoscopic sinus surgery) simulator

• TURP (trans-urethral resection of the prostate) simulator

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Why Surgical Simulation?

• training• credentialing• planning and rehearsal• telesurgery/OR of the future

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See One, Do One, Teach one

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Once is Not Enough

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Big Questions

• What is the objective of the simulation?

• What do you need to simulate to achieve the objective?

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Core Design Issues

• anatomical detail• graphical realism• haptic realism• instrumental realism• bells and whistles• user (proctor) interface• validation

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Anatomical Detail

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Graphical Realism

Type 1

in-vivo

in-vitro

Type 2 Type 3

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Haptic Realism

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Instrumental Realism

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Bells and Whistles

• OR sounds • speech input• intelligent agents• training aids

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System Integration

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Proctor Interface

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Simulator Validation

3.65

3.27

5.2

4.46

3.32

4.93

4.23

0

1

2

3

4

5

6

Visual Realism Tactile Realism Auditory Realism Bleeding/Bubbles Chips Instrumentation Overall

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Simulator Validation

Non-MD Junior Resident

Senior Resident Staff ENT

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Collaborators HIT Lab

• Peter Oppenheimer• Jeff Berkley• Chris Airola• Duff Hendrickson• Tim Kowalewsky

UW School of Medicine• Rob Sweet, Jim Porter (Urology)• Dan Berg, Greg Raugi (Dermatological Surgery)• Mika Sinanan (Surgery/CVES)

Others• Chuck Edmond (Madigan Army Hospital - ENT)• Marvin Fried (Montefiore Hospital - ENT)• Rick Satava (Yale Medical School - Surgery)• George Turkiyyah (Civil Engineering)• Mark Ganter (Mechanical Engineering)

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Thank You