Accurate registration of cone-beam computed tomography scans to 3-dimensional facial photographs.

نویسندگان

  • Kyung-Yen Nahm
  • Yong Kim
  • Yong-Suk Choi
  • Jeongjin Lee
  • Seong-Hun Kim
  • Gerald Nelson
چکیده

INTRODUCTION Registering a 3-dimensional (3D) facial surface scan to a cone-beam computed tomography (CBCT) scan has various advantages. One major advantage is to compensate for the inaccuracy of the CBCT surface data. However, when registering CBCT and 3D facial scans, changes in facial expression, spatial soft-tissue changes, and differences in the patient's positioning can decrease the accuracy of the registration. In this study, we introduce a new 3D facial scanner that is combined with a CBCT apparatus. Our goal was to evaluate the registration accuracy of CBCT and 3D facial scans, which were taken with the shortest possible time between them. METHODS The experiment was performed with 4 subjects. Each patient was instructed to hold as still as possible while the CBCT scan was taken, followed immediately by the 3D facial surface scan. The images were automatically registered with software. The accuracy was measured by determining the degree of agreement between the soft-tissue surfaces of the CBCT and the 3D facial images. RESULTS The average surface discrepancy between the CBCT facial surface and 3D facial surface was 0.60 mm (SD, 0.12 mm). Registration accuracy was also visually verified by toggling between the images of the CBCT and 3D facial surface scans while rotating the registered images. CONCLUSIONS Registration of consecutively taken CBCT and 3D facial images resulted in reliable accuracy.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Assessment of Cone-Beam Computed Tomography (CBCT) Findings in Facial Asymmetric Patients

Introduction: Due to the complexity of facial asy-mmetry, the diagnosis of different aspects of asymmetry via conventional radiographs is not precise. In this study, we investigated findings of facial asymmetry by using cone- beam computed tomography (CBCT) images. Materials and Methods: In this descriptive study, we evaluated CBCT findings of 18 patients i.e. a group of 14 females and 4 males ...

متن کامل

Regional 3D superimposition to assess temporomandibular joint condylar morphology.

OBJECTIVES To investigate the reliability of regional three-dimensional registration and superimposition methods for assessment of temporomandibular joint condylar morphology across subjects and longitudinally. METHODS The sample consisted of cone beam CT scans of 36 patients. The across-subject comparisons included 12 controls, mean age 41.3 ± 12.0 years, and 12 patients with temporomandibul...

متن کامل

Anatomic Situation of Posterior Superior Alveolar Artery in Cone-Beam Computed Tomography Images in Maxillary Molar Region

Introduction: Bleeding is an important complication during implant placement. The aim of this study was to evaluate the anatomic situation of the posterior superior alveolar artery (PSAA) in cone-beam computed tomography (CBCT) images in maxillary molar region in an Iranian population. Methods: In this descriptive cross-sectional study, CBCT scans of the edentulous regions of the posterior max...

متن کامل

Foreign Body in Nasal Cavity: Panoramic and Cone-Beam Computed Tomography (CBCT) Findings

Introduction: Panoramic view as a routine dental radiograph has an important role in diagnosis of other facial abnormalities accompanied with dento- alveolar structures. In this case presentation, we discuss this subject and also the efficacy of cone-beam computed tomography in localization of foreign body in complex anatomy of nasal cavity.

متن کامل

How Accurate Are the Fusion of Cone-Beam CT and 3-D Stereophotographic Images?

BACKGROUND Cone-beam Computed Tomography (CBCT) and stereophotography are two of the latest imaging modalities available for three-dimensional (3-D) visualization of craniofacial structures. However, CBCT provides only limited information on surface texture. This can be overcome by combining the bone images derived from CBCT with 3-D photographs. The objectives of this study were 1) to evaluate...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics

دوره 145 2  شماره 

صفحات  -

تاریخ انتشار 2014