Table 2 .

Feature Comparison Chart

Feature	W3D-VBS	CSA	VHB	AnatLine*	VHV	Description
Volumetic 3D models	Yes	No	No	No	No	Define and view a volume
Haptic capability	Yes	No	No	No	No	Touch models with haptic device
Stereoscopic haptics	Yes	No	No	No	No	View and touch the s-VBS models stereoscopically
Learning Progress Evaluation	Yes	No	No	No	No	Track progress of learning anatomy
Voice controlled interface	Yes	No	No	No	No	Use voice commands to control interface
Slice views	Axial, coronal, sagittal	Axial	Axial, coronal, sagittal	Axial	Axial, coronal, sagittal	Sagittal: side-to-side Coronal: front-to-back Axial: top-to-bottom
Detailed slice navigation	Yes	Yes	No	Yes*	No	Display structure name that mouse is pointing to
Show volume of slices	Yes	No	No	Yes *	No	View all slices that contain the specified structure
Highlighting	Yes	Yes	No	Yes *	No	Highlight selected structures
3D Structure labeling	Yes	No	No	No	No	Display structure name that mouse is pointing to or clicking on at the volumetric level
Structures categorized	Yes	Yes	No	Yes	No	Look up structures by functional types and body regions
Surface-based 3D models	Yes	No	No	Yes *	No	Select, view and interact with prebuilt 3D surface models
Select a specific slice by slice id	Yes	No	No	Yes *	No	Specify a slice to view
Search engine	Yes	Yes	No	Yes	No	Search for specific structure
User authentication	Yes	Yes	No	No	No	Login required
Image pixel resolution	1760 × 1024	590 × 343	Up to 2048 × 1216	N/A	Up to 1728 × 940	Image resolution user can see

*AnatLine’s online browser provides images of some pregenerated 3D surface models. Its detailed slice images are available for download and view with its VHDisplay software.