A novel semi-automatic segmentation protocol for volumetric assessment of alveolar cleft grafting procedures.
A novel protocol for volumetric assessment of alveolar cleft grafting procedures is presented. Eleven cone-beam computed tomography (CBCT) datasets of patients who underwent secondary alveolar cleft reconstructive surgery for a unilateral alveolar cleft were evaluated by two investigators. Residual bone volumes 1 year after surgery were analysed using a semi-automated technique in which preoperative CBCT datasets were superimposed on the postoperative scans using voxel-based registration. To define the correct boundaries of the alveolar cleft defect in the preoperative CBCT dataset, a mirror image of the preoperative CBCT dataset was superimposed on the preoperative CBCT dataset. For the difference in residual bone volume between the two observers, an intraclass correlation of 0.98 and a Dice coefficient of 0.89 were found. This study describes a reliable segmentation protocol for volumetric analysis of the alveolar cleft defect in patients with a unilateral alveolar cleft.
Department of Oral and Maxillofacial Surgery, University Medical Centre Utrecht, Utrecht, The Netherlands. Electronic address: N.G.Janssen-2@umcutrecht.nl.
Nard G
NG
Janssen
Department of Oral and Maxillofacial Surgery, Radboud University Medical Centre Nijmegen, Nijmegen, The Netherlands.
Ruud
R
Schreurs
Department of Oral and Maxillofacial Surgery, University Medical Centre Utrecht, Utrecht, The Netherlands.
Gerhard K P
GKP
Bittermann
Department of Oral and Maxillofacial Surgery, Radboud University Medical Centre Nijmegen, Nijmegen, The Netherlands.
Wilfred A
WA
Borstlap
Department of Oral and Maxillofacial Surgery, University Medical Centre Utrecht, Utrecht, The Netherlands.
Ronald
R
Koole
Department of Oral and Maxillofacial Surgery, Radboud University Medical Centre Nijmegen, Nijmegen, The Netherlands.
Gert J
GJ
Meijer
Department of Oral and Maxillofacial Surgery, Radboud University Medical Centre Nijmegen, Nijmegen, The Netherlands.
Thomas J J
TJJ
Maal
D064728:Alveolar Bone Grafting / Q000379:methods*; D000539:Alveolar Process / Q000002:abnormalities / Q000000981:diagnostic imaging / Q000601:surgery*; D001331:Automation / Q000379:methods; D002648:Child; D002971:Cleft Lip / Q000601:surgery; D002972:Cleft Palate / Q000601:surgery; D054893:Cone-Beam Computed Tomography; D005260:Female; D006801:Humans; D008297:Male; D019651:Plastic Surgery Procedures / Q000379:methods
3D imaging; Alveolar cleft; Cleft lip and palate; Cone beam CT; Segmentation