The Kinect is a low-cost motion-sensing device designed
for Microsoft’s Xbox 360. Software has been created that enables
user to access data from the Kinect, enhancing its versatility. This study
characterizes the spatial accuracy and precision of the Kinect for creating 3D
images for use in medical applications. Measurements of distances between surface
features on both flat and curved objects were made using 3D images created by
the Kinect. These measurements were compared to control measurements made by a
ruler, calipers or by a CT scan and using the ruler tools provided.
Measurements on flat surfaces matched closely to control measurements, with
average differences between the Kinect and control measurements of less than 2 mm and percent errors of less than 1%. Measurements
on curved surfaces also matched control measurements but errors up to 3mm occurred when measuring protruding
surface features or features along lateral boundaries of objects. The Kinect is
an alternative to other 3D imaging devices such as CT scanners, laser scanners
and photogrammetric devices. Alternative 3D meshing algorithms and combining
images from multiple Kinects could resolve errors made when using the
Kinect to measure features on curved surfaces. Medical applications include
craniofacial anthropometry, radiotherapy patient positioning and surgical
Cite this paper
B. Shin, R. Venkatramani, P. Borker, A. Olch, J. Grimm and K. Wong, "Spatial Accuracy of a Low Cost High Resolution 3D Surface Imaging Device for Medical Applications," International Journal of Medical Physics, Clinical Engineering and Radiation Oncology
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