View source for Validation of Defined Regions of Interest Using Surface Scanning

'''Objective:'''

* To evaluate manual and automated segmentation routines using surface scans of disected bones from cadaveric specimens

'''Progress:'''

* CT images of the hand and wrist have been obtained
* Four hands have been disected and bones extracted
* Surface scanning for these disected bones is completed using a Roland LPX-250 Laser Scanner
* Manual tracing of the CT images is completed
* Evaluate reliability of the manual tracers is complete using relative overlap
* Tools have been developed to reorient surface axes and to register the manually defined model and the surface resulting from laser scanning
* Distance maps for the manual segmentation have been generated.
* The effect of various post processing routines have been studied relative to changes in the surface geometry relative to the laser scan.


'''Publications:'''
* DeVries NA, Gassman EE, Kallemeyn NA, Shivanna KH, Magnotta VA, Grosland NM. [http://www.springerlink.com/content/u36v5957k17536wt/ Validation of phalanx bone three-dimensional surface segmentation from computed tomography images using laser scanning]. Skeletal Radiol. 37(1):35-42, 2008. 


'''Key Investigators:'''

* Iowa: Nicole Grosland, Vincent Magnotta, Nicole DeVries

'''Links:'''
*[http://www.ccad.uiowa.edu/mimx Musculoskeletal Imaging, Modelling and Experimentation (MIMX)]

'''References:'''
* [http://www.springerlink.com/content/u36v5957k17536wt/ Devries NA, Gassman EE, Kallemeyn NA, Shivanna KH, Magnotta VA, Grosland NM. Validation of Phalanx Bone 3D Surface Segmentation from CT Images Using Laser Scanning, Skeletal Radiology, 2007] 

'''Figures:'''

[[Image:DistanceMapTool.jpg|left|thumb|300px|Surface distance mapping tool developed in FLTK]]

[[Image:DistanceMap.png|left|thumb|300px|Surface Distance Map for a phalanx bone between a surface manually defined via CT and a physical surface laser scan.]]

[[Image:SurfaceOverlay.png|left|thumb|200px|Overlay of the physical surface (White) and CT based surface (Purple)]]