Results 21 to 30 of about 1,723,588 (348)

Influence of Connecting Two Standalone Mobile Three-Dimensional Scanners on Accuracy Comparing with a Standard Device in Facial Scanning

eJournal of Oral Maxillofacial Research, 2017
Objectives: In this study is investigated if bundling of two scanners leads to better accuracy in recording faces than a standard face-scanning device. Material and Methods: In a group of 28 volunteers, two test specimens were attached to their faces:
Ali Modabber, Florian Peters, Anna Brokmeier, Evgeny Goloborodko, Anna Brokmeier, Alireza Ghassemi, Bernd Lethaus, Frank Hölzle, Stephan Christian Möhlhenrich, Frank Hölzle   +9 more
doaj   +1 more source

Accuracy between intraoral and extraoral scanning: Three-dimensional deviation and effect of distance between implants from two scanning methods

The Journal of Indian Prosthodontic Society, 2022
Aim: Evaluate the accuracy between the intraoral and extraoral scanning regarding the three dimensional (3D) deviation and distances between the implants, through 2 scanning methods. Settings and Design: An in vitro study.
Ana Larisse Carneiro Pereira, Henrique Vieira Melo Segundo, Luiz Carlos Alves Júnior, Adriano Rocha Germano, Adriana Da Fonte Porto Carreiro   +4 more
doaj   +1 more source

Volume staging for arteriovenous malformation SRS treatment using VMAT

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Volume staging involves dividing the target volume into smaller parts and treating each part separately. In this study, the feasibility of volume‐staged stereotactic radiosurgery (VS‐SRS) on a linear accelerator using volumetric modulated arc therapy (VMAT) and a frameless patient positioning system is investigated.
Claudia Mendez, Ermias Gete
wiley   +1 more source

Linear Accuracy of Full-Arch Digital Models Using Four Different Scanning Methods: An In Vitro Study Using a Coordinate Measuring Machine

Applied Sciences, 2020
Improving the accuracy of the digital model is essential for the digitalization of the dental field. This study introduced a novel method of objective accuracy evaluation of digitized full dental arch model using coordinate measuring machine (CMM).
Young Hyun Kim, Sang-Sun Han, Yoon Joo Choi, Chang-Woo Woo   +3 more
doaj   +1 more source

Evaluation of the linear and volumetric measuring changes in different positions in CBCT

Clinical and Experimental Dental Research, 2023
Objectives The effect of head position on reproducibility of volumetric measurements on Cone‐beam computed tomography (CBCT) scans has not been evaluated before.
Samira Fani, Ehsan Moudi, Sina Haghanifar, Seyedali Seyedmajidi, Arash Poursattar‐Bejeh Mir   +4 more
doaj   +1 more source

Evaluation of Fitting Accuracy of Light- and Auto-Polymerizing Reline Materials Using Three-Dimensional Measurement Techniques. [PDF]

Polymers (Basel)
Utsumi M, Murakami N, Yamazaki T, Hirata A, Komine K, Li B, Takakusaki K, Wada J, Wakabayashi N.   +8 more
europepmc   +2 more sources

Validation of pencil beam scanning proton therapy with multi‐leaf collimator calculated by a commercial Monte Carlo dose engine

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract This study aimed to evaluate the clinical beam commissioning results and lateral penumbra characteristics of our new pencil beam scanning (PBS) proton therapy using a multi‐leaf collimator (MLC) calculated by use of a commercial Monte Carlo dose engine.
Yuki Tominaga, Yusuke Sakurai, Junya Miyata, Shuichi Harada, Takashi Akagi, Masataka Oita   +5 more
wiley   +1 more source

Effect of different noise reduction techniques and template matching parameters on markerless tumor tracking using dual‐energy imaging

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Purpose To evaluate the impact of various noise reduction algorithms and template matching parameters on the accuracy of markerless tumor tracking (MTT) using dual‐energy (DE) imaging. Methods A Varian TrueBeam linear accelerator was used to acquire a series of alternating 60 and 120 kVp images (over a 180° arc) using fast kV switching, on ...
Mandeep Kaur, Peter Wagstaff, Hassan Mostafavi, Mathias Lehmann, Daniel Morf, Liangjia Zhu, Hyejoo Kang, Michal Walczak, Matthew M. Harkenrider, John C. Roeske   +9 more
wiley   +1 more source

A new measure for assessment of clustering based on kernel density estimation [PDF]

Communications in Statistics - Theory and Methods (2022), 2022
A new clustering accuracy measure is proposed to determine the unknown number of clusters and to assess the quality of clustering of a data set given in any dimensional space. Our validity index applies the classical nonparametric univariate kernel density estimation method to the interpoint distances computed between the members of data.
arxiv   +1 more source

Anthropometric accuracy of three-dimensional average faces compared to conventional facial measurements [PDF]

Scientific Reports, 2021
AbstractThis study aimed to evaluate and compare the accuracy of average faces constructed by different methods. Original three-dimensional facial images of 26 adults in Chinese ethnicity were imported into Di3DView and MorphAnalyser for image processing.
Min Gu, Richard Tai-Chiu Hsung, Juanjuan Ji, Balvinder Khambay, Balvinder Khambay, Wenping Wang, Wenping Wang, Zhiyi Shan, Congyi Zhang, Wing Shan Choi, Yanqi Yang   +10 more
openaire   +4 more sources