Volumetric difference evaluation of registered three-dimensional pre-operative and post-operative CT dental data

Economopoulos, TL; Asvestas, PA; Matsopoulos, GK; Molnar, B; Windisch, P

dc.contributor.author	Economopoulos, TL	en
dc.contributor.author	Asvestas, PA	en
dc.contributor.author	Matsopoulos, GK	en
dc.contributor.author	Molnar, B	en
dc.contributor.author	Windisch, P	en
dc.date.accessioned	2014-03-01T02:14:54Z
dc.date.available	2014-03-01T02:14:54Z
dc.date.issued	2012	en
dc.identifier.issn	0250832X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30172
dc.subject	Alveolar ridge augmentation	en
dc.subject	Computer-assisted image processing	en
dc.subject	Digital subtraction radiography	en
dc.subject	Volumetric computed tomography	en
dc.subject.other	algorithm	en
dc.subject.other	article	en
dc.subject.other	biological model	en
dc.subject.other	bone transplantation	en
dc.subject.other	computer assisted diagnosis	en
dc.subject.other	cone beam computed tomography	en
dc.subject.other	human	en
dc.subject.other	image processing	en
dc.subject.other	image subtraction	en
dc.subject.other	methodology	en
dc.subject.other	oral surgery	en
dc.subject.other	postoperative period	en
dc.subject.other	preoperative care	en
dc.subject.other	radiography	en
dc.subject.other	three dimensional imaging	en
dc.subject.other	tooth radiography	en
dc.subject.other	Algorithms	en
dc.subject.other	Alveolar Ridge Augmentation	en
dc.subject.other	Bone Transplantation	en
dc.subject.other	Cone-Beam Computed Tomography	en
dc.subject.other	Humans	en
dc.subject.other	Image Processing, Computer-Assisted	en
dc.subject.other	Imaging, Three-Dimensional	en
dc.subject.other	Models, Biological	en
dc.subject.other	Postoperative Period	en
dc.subject.other	Preoperative Care	en
dc.subject.other	Radiographic Image Interpretation, Computer-Assisted	en
dc.subject.other	Radiography, Dental, Digital	en
dc.subject.other	Subtraction Technique	en
dc.title	Volumetric difference evaluation of registered three-dimensional pre-operative and post-operative CT dental data	en
heal.type	journalArticle	en
heal.identifier.primary	10.1259/dmfr/94040044	en
heal.identifier.secondary	http://dx.doi.org/10.1259/dmfr/94040044	en
heal.publicationDate	2012	en
heal.abstract	Objective: The purpose of this study is to propose a complete methodology for automatically registering three-dimensional (3D) pre-operative and post-operative CT scan dental volumes as well as to provide a toolset for quantifying and evaluating their volumetric differences. Methods: The proposed methodology was applied to cone beam CT (CBCT) data from 20 patients in order to assess the volume of augmented bone in the alveolar region. In each case, the pre-operative and post-operative data were registered using a 3D affine-based scheme. The performance of the 3D registration algorithm was evaluated by measuring the average distance between the edges of the registered sets. The differences between the registered sets were assessed through 3D subtraction radiography. The volume of the differences was finally evaluated by defining regions of interest in each slice of the subtracted 3D data and by combining all respective slices to model the desired volume of interest. The effectiveness of the algorithm was verified by applying it to several reference standard-shaped objects with known volumes. Results: Satisfactory alignment was achieved as a low average offset of 1.483 ± 1.558 mm was recorded between the edges of the registered sets. Moreover, the estimated volumes closely matched the volumes of the reference objects used for verification, as the recorded volume differences were less than 0.4 mm3 in all cases. Conclusion: The proposed method allows for automatic registration of 3D CBCT data sets and the volumetric assessment of their differences in particular areas of interest. The proposed approach provides accurate volumetric measurements in three dimensions, requiring minimal user interaction. © 2012 The British Institute of Radiology.	en
heal.journalName	Dentomaxillofacial Radiology	en
dc.identifier.doi	10.1259/dmfr/94040044	en
dc.identifier.volume	41	en
dc.identifier.issue	4	en
dc.identifier.spage	328	en
dc.identifier.epage	339	en