Modern approaches to the elimination of artifacts of cone-beam computed tomography of the maxillofacial region

2021 ◽  
Vol 1 (38) ◽  
pp. 14-20
Author(s):  
A. A. Dolgalev ◽  
A. B. Danaev ◽  
S.J. Hossain ◽  
A. A. Kulikova ◽  
N. F. Yamurkova ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Soft Tissues ◽  
Maxillofacial Surgery ◽  
Three Dimensional ◽  
Qualitative Assessment ◽  
Cone Beam ◽  
Area Of Interest ◽  
The Right

The use of X-ray radiation is the main additional method for complete visualization of hard and soft tissues in dentistry and maxillofacial surgery. Cone-beam computed tomography (CBCT) is of leading importance among other methods. Three-dimensional reformation of CBCT data into a multiplanar or three-dimensional image of anatomical structures allows for a qualitative assessment of the area of interest and to choose the right treatment tactics if necessary. Nevertheless, there are a number of factors or artifacts that lead to distortion, disrupt the image or lead to loss of information during CBCT, in addition, the formation of overdiagnosis is not excluded. Currently, an active search is underway for ways to improve the quality of CBCT images and eliminate artifacts to improve the quality of diagnostics. This review is devoted to the description of the main causes of artifacts and modern methods of their elimination.

scholarly journals Sex determination by osteometric assessment of the mastoid process using Cone Beam Computed Tomography

2020 ◽  
Vol 24 (1) ◽  
Author(s):  
Fatemeh Salemi ◽  
Maryam Farhadian ◽  
Abbas Shokri ◽  
Yaser Safi ◽  
Shahin Rahimpanah
Keyword(s):  
Computed Tomography ◽  
Sex Determination ◽  
Cone Beam Computed Tomography ◽  
Function Analysis ◽  
Three Dimensional ◽  
Good Method ◽  
Cone Beam ◽  
Mastoid Process ◽  
Discriminant Model ◽  
The Right

Objective: Sex determination is one of the most important parameters to identify in forensic science. Because the mastoid process is the most resistant to damage due to its position in the skull base, it can be used for sex determination. The purpose of this study was to measure the dimensions and convexity and internal angles of the mastoid process to present a model of sex determination in Iranian population. Material and methods: This study was performed on three-dimensional images of 190 Cone Beam Computed Tomography (CBCT) of 105 women and 85 men. On each CBCT the distance between the porion and the mastoid (PM), mastoid length (ML), the distance between the mastoidale and the mastoid incision (M-I), the mastoid height (MH), the mastoid width (MW), intermastoidale distance (IMD) the lateral surfaces of the left and right mastoids (IMLSD) and the Mastoid medial convergence angle (MMCA) was measured on both the right and the left. The data were analyzed by descriptive statistics, t-test, and discriminant function analysis. Results: Significant differences were found for all variables except MMCA and MF in both sex. All measured variables except MW were greater for men than women. The discriminant model achieved a total accuracy of 93.7%. Among the measured factors IMD and IMSLD had the most influence on sex determination. Conclusion: Measuring the dimensions of the mastoid process is a very good method for sex determination with high accuracy of 90%. KEYWORDS Discriminant model; Cone beam computed tomography (CBCT); Sex determination; Mastoid process.

scholarly journals Integration of Digital Dental Casts in Cone-Beam Computed Tomography Scans

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Frits A. Rangel ◽  
Thomas J. J. Maal ◽  
Stefaan J. Bergé ◽  
Anne Marie Kuijpers-Jagtman
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Orthognathic Surgery ◽  
Soft Tissues ◽  
Average Distance ◽  
Maxillofacial Surgery ◽  
Digital Data ◽  
Cone Beam ◽  
Novel Method ◽  
Dental Casts

Cone-beam computed tomography (CBCT) is widely used in maxillofacial surgery. The CBCT image of the dental arches, however, is of insufficient quality to use in digital planning of orthognathic surgery. Several authors have described methods to integrate digital dental casts into CBCT scans, but all reported methods have drawbacks. The aim of this feasibility study is to present a new simplified method to integrate digital dental casts into CBCT scans. In a patient scheduled for orthognathic surgery, titanium markers were glued to the gingiva. Next, a CBCT scan and dental impressions were made. During the impression-taking procedure, the titanium markers were transferred to the impression. The impressions were scanned, and all CBCT datasets were exported in DICOM format. The two datasets were matched, and the dentition derived from the scanned impressions was transferred to the CBCT of the patient. After matching the two datasets, the average distance between the corresponding markers was 0.1 mm. This novel method allows for the integration of digital dental casts into CBCT scans, overcoming problems such as unwanted extra radiation exposure, distortion of soft tissues due to the use of bite jigs, and time-consuming digital data handling.

scholarly journals Cone-beam computed tomography evaluation on the changes in condylar long axis according to asymmetric setback in sagittal split ramus osteotomy patients

2016 ◽  
Vol 87 (2) ◽  
pp. 254-259 ◽  
Author(s):  
Sun-Young Lim ◽  
Tingting Jiang ◽  
Min-Hee Oh ◽  
Min-Suk Kook ◽  
Jin-Hyoung Cho ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Correlation Analysis ◽  
Cone Beam Computed Tomography ◽  
Pearson Correlation ◽  
Statistical Significance ◽  
Three Dimensional ◽  
Cone Beam ◽  
Sagittal Split Ramus Osteotomy ◽  
Pearson Correlation Analysis ◽  
The Right

ABSTRACT Objective: To determine whether the condylar rotation is affected by asymmetric setback in patients undergoing sagittal split ramus osteotomy. Materials and Methods: Thirty patients who underwent bilateral sagittal split ramus osteotomy setback surgery were divided into the two groups, symmetric setback and asymmetric setback, according to the right/left difference of setback amount (<2.0, ≥2.0 mm). Condylar long axis changes were evaluated using the three-dimensional superimposition of before and immediately after surgery cone-beam computed tomography volume images. Evaluations were performed separately in lesser setback and greater setback side in patients undergoing asymmetric setback, whereas both side condyles were evaluated together in patients undergoing symmetric setback. Condylar axis changes on axial view were correlated with setback amount or right/left setback difference using Pearson correlation analysis. Results: In general, the condylar axis change occurred in a pattern of inward rotation. The condyles in patients undergoing symmetric setback showed 3.4° rotation in average. In case of asymmetric setback, the lesser setback side showed larger value (4.3°) than the greater setback side (2.3°) with a statistical significance. In the correlation analysis, setback amount showed no significant correlation with the condylar axis changes in both groups. However, correlation with right/left setback difference showed a positive correlation in lesser setback side of patients undergoing asymmetric setback. Conclusion: The findings of this study indicate that large amount of setback alone does not contribute to the change in condylar long axis, but asymmetric setback might cause a change in condylar long axis, particularly on the lesser setback side.

scholarly journals Influence of scanning and reconstruction parameters on quality of three-dimensional surface models of the dental arches from cone beam computed tomography

2009 ◽  
Vol 14 (3) ◽  
pp. 303-310 ◽  
Author(s):  
Bassam Hassan ◽  
Paulo Couto Souza ◽  
Reinhilde Jacobs ◽  
Soraya de Azambuja Berti ◽  
Paul van der Stelt
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Three Dimensional ◽  
Cone Beam ◽  
Surface Models ◽  
Dimensional Surface

scholarly journals Three-dimensional printing in endodontics: A review of literature

2021 ◽  
Vol 6 (4) ◽  
pp. 198-204
Author(s):  
Jyoti Chauhan ◽  
Ida de Noronha de Ataide ◽  
Marina Fernandes
Keyword(s):  
Computed Tomography ◽  
3D Printing ◽  
Cone Beam Computed Tomography ◽  
Raw Materials ◽  
Three Dimensional ◽  
Cone Beam ◽  
Review Of Literature ◽  
Three Dimensional Printing ◽  
The Right ◽  
Dimensional Printing

Three-dimensional (3D) printing is a fast evolving technology and is being increasingly used in dentistry. Compared to the older and traditional (lost-wax technique) methods, 3D printing has an upper hand. A wider variety of raw materials can be utilized with 3D printing. Even though this technology has been known for over 30 years, but its assimilation into practice was slow as it relied on the availability of the right materials, which give accurate prints and have optimal biocompatibity. 3D printing technology can use Cone beam computed tomography (CBCT) data for fabrication of guides used in surgical and non-surgical endodontics. This article assesses applications of 3D printing in endodontics.

scholarly journals Intrapetrous Anastomosis between the Internal Jugular Vein and the Superior Petrosal Sinus: Cone Beam Computed Tomography Incidental Finding

2015 ◽  
Vol 5 ◽  
pp. 46
Author(s):  
Ilson Sepúlveda ◽  
Thomas Schmidt ◽  
Enrique Platín
Keyword(s):  
Computed Tomography ◽  
Internal Jugular Vein ◽  
Cone Beam Computed Tomography ◽  
Soft Tissues ◽  
Jugular Vein ◽  
Incidental Finding ◽  
Three Dimensional ◽  
Cone Beam ◽  
Anatomical Variant ◽  
Superior Petrosal Sinus

This is a case report of a 62-year-old male who presented to the Ear, Nose, and Throat clinic for a follow-up exam for hearing loss stemming from a fall from a horse in his infancy. A Cone Beam Computed Tomography (CBCT) examination revealed an intrapetrous communication between the internal jugular vein bulb and the superior petrosal sinus. Three-dimensional bone and soft tissues volume renderings were generated to demonstrate this incidental anatomical variant.

Value of cone beam computed tomography to evaluate complication of intracranial haemorrhage in endovascular treatment (evt): a case report

2019 ◽  
Vol 1 (1) ◽  
pp. 16-18 ◽  
Author(s):  
Norafida Bahari ◽  
Nik Azuan Nik Ismail ◽  
Jegan Thanabalan ◽  
Ahmad Sobri Muda
Keyword(s):  
Computed Tomography ◽  
Arteriovenous Malformation ◽  
Endovascular Treatment ◽  
Cone Beam Computed Tomography ◽  
Diagnostic Value ◽  
Cone Beam ◽  
Brain Arteriovenous Malformation ◽  
Embolic Materials

In this article, we evaluate the effectiveness of Cone Beam Computed Tomography, through a case study, in assessing the complication of intracranial bleeding during an endovascular treatment of brain arteriovenous malformation when compared to Multislice-Detector Computed Tomography performed immediately after the procedure. The image quality of Cone Beam Computed Tomography has enough diagnostic value in differentiating between haemorrhage, embolic materials and the arteriovenous malformation nidus to facilitate physicians to decide for further management of the patient.

Value of cone beam computed tomography to evaluate complication of intracranial haemorrhage in endovascular treatment (evt): a case report.

2019 ◽  
pp. 16-18
Author(s):  
Norafida Bahari ◽  
NikAzuan Nik Ismail ◽  
Jegan Thanabalan ◽  
Ahmad Sobri Muda
Keyword(s):  
Computed Tomography ◽  
Arteriovenous Malformation ◽  
Endovascular Treatment ◽  
Cone Beam Computed Tomography ◽  
Diagnostic Value ◽  
Cone Beam ◽  
Brain Arteriovenous Malformation ◽  
Embolic Materials

In this article, we evaluate the effectiveness of Cone Beam Computed Tomography, through a case study, in assessing the complication of intracranial bleeding during an endovascular treatment of brain arteriovenous malformation when compared to Multislice-Detector Computed Tomography performed immediately after the procedure. The image quality of Cone Beam Computed Tomography has enough diagnostic value in differentiating between haemorrhage, embolic materials and the arteriovenous malformation nidus to facilitate physicians to decide for further management of the patient.

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