S192 – 3D Diagnosis of Vocalizing Larynx Using Cone Beam CT

2008 ◽  
Vol 139 (2_suppl) ◽  
pp. P140-P140
Author(s):  
Koji Inagaki ◽  
Koichiro Saito ◽  
Hideki Naganishi ◽  
Takaoka Takuj ◽  
Momoshima Suketaka ◽  
...  
Keyword(s):  
Vocal Fold ◽  
3D Visualization ◽  
Cone Beam Ct ◽  
Vocal Folds ◽  
Cone Beam ◽  
3 Dimensional ◽  
Scanning Time ◽  
Informative Role ◽  
Glottal Insufficiency ◽  
The Impact

Objectives Cone beam computed tomography (CBCT) was developed for the office-based quick and precise 3D visualization of maxillofacial region. CBCT requires scanning time of less than 10 seconds and provides isotropic 3D image with high resolution. In this study, we examined the potential role of CBCT as a tool for 3-dimensional evaluation of the glottal insufficiency. Methods CBCT was performed in 2 normal controls and in 14 patients with unilateral vocal fold paralysis (13 cases) or paresis (1 case). Laryngeal CBCT images were taken in the resting state and during phonation. Furthermore, preoperative and postoperative images were evaluated to assess the impact of phonosurgeries in 5 cases. Results CBCT of the vocalizing vocal fold was successfully performed in all the cases, producing clear coronal images. During phonation, no remarkable differences in levels between the paralyzed and normal vocal folds were observed in 10 cases, proving the 2-dimensional glottal gap (2D cases). On the other hand, the levels of paralyzed vocal folds stayed higher during phonation compared to the normal side in 4 cases, proving the 3-dimensional glottal gap (3D cases). 4 of the 2D cases had injection laryngoplasty and 1 of the 3D cases had arytenoid adduction procedure to correct their glottal gaps. Postoperative CBCT images verified the successful correction of these gaps. Conclusions Our study proved the feasibility of CBCT for 3D evaluation of vocalizing larynx. This quick and easy system may have an informative role to suggest the proper phonosurgical procedure for glottic insufficiency.

scholarly journals 3D-cinematic rendering for dental and maxillofacial imaging

2020 ◽  
Vol 49 (1) ◽  
pp. 20190249
Author(s):  
Bernd Stadlinger ◽  
Silvio Valdec ◽  
Lorenz Wacht ◽  
Harald Essig ◽  
Sebastian Winklhofer
Keyword(s):  
3D Visualization ◽  
Cone Beam Ct ◽  
Technical Note ◽  
High Density ◽  
Cone Beam ◽  
Imaging Data ◽  
Hard Tissue ◽  
3 Dimensional ◽  
Cinematic Rendering ◽  
Potential Applications

Objectives: Aim of this technical note is to show the applicability of cinematic rendering (CR) for a photorealistic 3-dimensional (3D) visualization of maxillofacial structures. The focus is on maxillofacial hard tissue pathologies. Methods: High density maxillofacial pathologies were selected in which CR is applicable. Data from both, CT and cone beam CT (CBCT) were postprocessed using a prototype CR software. Results: CR 3D postprocessing of CT and CBCT imaging data is applicable on high density structures and pathologies such as bones, teeth, and tissue calcifications. Image reconstruction allows for a detailed visualization of surface structures, their plasticity, and 3D configuration. Conclusions: CR allows for the generation of photorealistic 3D reconstructions of high density structures and pathologies. Potential applications for maxillofacial bone and tooth imaging are given and examples for CT and CBCT images are displayed.

scholarly journals Cone-Beam Three-Dimensional Dental Volumetric Tomography in Dental Practice

2017 ◽  
Vol 7 (3) ◽  
pp. 62 ◽  
Author(s):  
Suzan Cangul ◽  
Ozkan Adiguzel
Keyword(s):  
Soft Tissues ◽  
Low Cost ◽  
Three Dimensional ◽  
Cone Beam ◽  
Imaging Method ◽  
Dental Practice ◽  
3 Dimensional ◽  
Scanning Time ◽  
Technological Advances ◽  
Native Speakers Of English

Imaging methods are of great importance for diagnosis and treatment in dentistry. With technological advances, great progress has been made in these methods. Over time, 3-dimensional (3-D) imaging has replaced 2-dimensional, thereby providing examination of objects in all directions. Of these methods, which play an important role in the clinical evaluation of patients, cone-beam computed tomography (CBCT) is the newest and most advanced imaging method. This method will revolutionize dental in comparison with conventional CT, it has several advantages, including a shorter scanning time, low radiation dose, low cost and the acquisition of high-resolution images. With 3-D imaging technology, this method has introduced the possibility of applying several procedures from diagnosis in the maxillofacial region to operative and surgical procedures. Although very clear results are not obtained from the imaging of soft tissues, the most important advantage of this technology is the capability of imaging hard and soft tissues together.   How to cite this article: Cangul S, Adiguzel O. Cone-Beam Three-Dimensional Dental Volumetric Tomography in Dental Practice. Int Dent Res 2017;7:62-70.  Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

SU-FF-I-53: The Impact of Portal Imager Shifts and the Assumption of Rigid Isocentricity On Megavoltage Cone Beam CT Images

2005 ◽  
Vol 32 (6Part3) ◽  
pp. 1916-1916 ◽  
Author(s):  
O Morin ◽  
S Bose ◽  
J Chen ◽  
M Aubin ◽  
J Pouliot
Keyword(s):  
Cone Beam Ct ◽  
Ct Images ◽  
Cone Beam ◽  
Megavoltage Cone Beam Ct ◽  
The Impact

scholarly journals Comparison of internal target volumes defined on 3-dimensional, 4-dimensonal, and cone-beam CT images of non-small-cell lung cancer

2016 ◽  
Vol Volume 9 ◽  
pp. 6945-6951 ◽  
Author(s):  
Fengxiang Li ◽  
Jianbin Li ◽  
Zhifang Ma ◽  
Yingjie Zhang ◽  
Jun Xing ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Cone Beam Ct ◽  
Small Cell ◽  
Cone Beam ◽  
Internal Target ◽  
Small Cell Lung ◽  
3 Dimensional ◽  
Target Volumes

Contribution of Glottic Insufficiency to Perceived Breathiness in Classically Trained Singers

2016 ◽  
Vol 31 (3) ◽  
pp. 179-184 ◽  
Author(s):  
Ellen Graham ◽  
Vrushali Angadi ◽  
Joanna Sloggy ◽  
Joseph Stemple
Keyword(s):  
Vocal Fold ◽  
Vocal Folds ◽  
Airflow Rate ◽  
Singing Voice ◽  
Glottic Insufficiency ◽  
Maximum Phonation Time ◽  
Breath Management ◽  
Subglottal Pressure ◽  
Glottal Insufficiency ◽  
Voice Students

Breathiness in the singing voice is problematic for classical singers. Voice students and singing teachers typically attribute breathiness to breath management issues and breathing technique. The present study sought to determine whether glottic insufficiency may also contribute to breathiness in a singer’s voice. Studies have revealed a relationship between insufficient vocal fold closure and inefficiency in the speaking voice. However, the effect of insufficient vocal fold closure on vocal efficiency in singers has yet to be determined. Two groups of voice students identified with and without breathiness issues underwent aerodynamic and acoustic voice assessment as well as laryngeal stroboscopy of the vocal folds to quantify the prevalence of insufficient vocal fold closure, also known as glottic insufficiency. These assessments revealed four groups: 1) those with glottic insufficiency and no perceived voice breathiness; 2) those with glottic sufficiency and perceived voice breathiness; 3) those with glottic insufficiency and perceived breathiness; and 4) those with glottic sufficiency and no perceived breathiness. Results suggest that previously undiscovered glottal insufficiency is common in young singers, particularly women, though the correlation with identified breathiness was not statistically significant. Acoustic and aerodynamic measures including noise-to-harmonics ratio, maximum phonation time, airflow rate, subglottal pressure, and laryngeal airway resistance were most sensitive to glottic insufficiency.

scholarly journals The impact of Cone Beam CT on financial costs and orthodontists’ treatment decisions in the management of maxillary canines with eruption disturbance

2017 ◽  
Vol 40 (1) ◽  
pp. 65-73 ◽  
Author(s):  
Helena Christell ◽  
Stephen Birch ◽  
Lars Bondemark ◽  
Keith Horner ◽  
Christina Lindh ◽  
...  
Keyword(s):  
Cone Beam Ct ◽  
Treatment Decisions ◽  
Cone Beam ◽  
Financial Costs ◽  
The Impact

scholarly journals The impact of software-based metal artifact reduction on the liquid embolic agent Onyx in cone-beam CT: a systematic in vitro and in vivo study

2021 ◽  
pp. neurintsurg-2021-018018
Author(s):  
Niclas Schmitt ◽  
Charlotte S Weyland ◽  
Lena Wucherpfennig ◽  
Christof M Sommer ◽  
Martin Bendszus ◽  
...  
Keyword(s):  
Cone Beam Ct ◽  
Brain Parenchyma ◽  
Cone Beam ◽  
Embolic Agent ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
The Impact

BackgroundOnyx is frequently used for endovascular embolization of intracranial arteriovenous malformations (AVMs) and dural arteriovenous fistulas (dAVFs). One drawback of using Onyx is the generation of artifacts in cone-beam CT (CBCT). These artifacts can represent an obstacle for the detection of periprocedural hemorrhage or planning of subsequent radiosurgery. This study investigates the effect of artifact reduction by the syngo DynaCT SMART Metal Artifact Reduction (MAR) software.MethodsA standardized in vitro tube model (n=10) was filled with Onyx 18 and CBCT image acquisition was conducted in a brain imaging phantom. Furthermore, post-interventional CBCT images of 20 patients with AVM (n=13) or dAVF (n=7), each treated with Onyx, were investigated. The MAR software was applied for artifact reduction. Artifacts of the original and the post-processed images were analyzed quantitatively (standard deviation in a region of interest on the layer providing the most artifacts) and qualitatively. For the patient images, the effect of the MAR software on brain parenchyma on artifact-free images was further investigated.ResultsQuantitative and qualitative analyses of both datasets demonstrated a lower degree of artifacts in the post-processed images (eg, patient images: 38.30±22.03 density units (no MAR; mean SD±SD) vs 19.83±12.31 density units (with MAR; p<0.001). The MAR software had no influence on the brain parenchyma in artifact-free images.ConclusionThe MAR software significantly reduced the artifacts evoked by Onyx in CBCT without affecting the visualization of brain parenchyma on artifact-free images. Applying this software could thus improve the quality of periprocedural CBCT images after embolization with Onyx.

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