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Craniofacial Phenotyper: Advanced Imaging Science for Research Studies

Learn the technology behind scientific imaging and research applications in craniofacial phenotyping, assessing difficulty of intubation. Explore 3D imaging for face curvature, volume measurements, and more.

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Craniofacial Phenotyper: Advanced Imaging Science for Research Studies

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  1. Craniofacial Phenotyper • Freshman Imaging Project • Sean Cooper • Rebecca Klein

  2. What is Imaging Science? • Combination of Physics, Mathematics, Engineering, and Computer Science • Studies technology behind scientific images • Applies this to scientific research http://www.cis.rit.edu/

  3. Motivation • Researching a new way of assessing the difficulty of intubation as opposed to traditional methods Picture given via email http://www.cs.rochester.edu/research/vision/people/Bo_Hu/ JACK WOJTCZAK URMC ANESTHESIOLOGIST Jack_Wojtczack@URMC.Rochester.edu BO HU U OF R RESEARCHER bhu@cvs.rochester.edu

  4. Our Assignment • Build a Craniofacial Phenotyper • Take a 3D image of the head • Use 3D image generated to find certain measurements • Asses the difficulty of intubation for a specific patient

  5. What are we Measuring? • Distance following the curvature of the face (3DS) • Between 7 points on the face • Also finding the volume of the head

  6. Basic Requirements • Accuracy: Our goal is ± 0.5 mm • Cost: Our goal is $3,000 • Speed: 1 to 2 second capture time, quick processing time • Robust: small, will not break easily, can be used in a variety of environments; easy/unnecessary calibration • Causes no harm to the patient

  7. What is 3D capture? • MAYBE ADD PICTURE? SOMETHING TO FILL IN WHITE SPACE

  8. Methods of Depth Capture • Time of Flight • A laser is pulsed • Distance is measured from the time it takes for the pulse to return • Geometrical • Emitter + Sensor at different positions • Triangulation

  9. Triangulation • Using geometry it is possible to determine depth if you know: • The distance between the sensor and the laser (D) • The angle of incidence (Z) Z D SENSOR LASER

  10. Point Cloud • An output format of a 3D scanner (.ply) • Creates a collection of spatial coordinates • From this a mesh (.obj) can be created and surface distances along the curvature can be measured Point cloud bunny http://www.engineeringspecifier.com/public/primages/pr1200.jpg Mesh bunny http://www.farfieldtechnology.com/products/toolbox/pointcloud/bunny1w.jpg

  11. Equipment Surveys • ADD MORE

  12. FaceGen September 15, 2011

  13. Kinect

  14. LiDAR http://www.saic.com/geospatial/images/lidar1.jpg

  15. Structured Light Scanner

  16. DAVID Laser Scanner http://www.david-laserscanner.com/

  17. Good Fair Poor

  18. Schedule Coding Research to understand theories of Software Extract measurements from point cloud data

  19. Questions?

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