keyword
MENU ▼
Read by QxMD icon Read
search

Cone beam computed tomography

keyword
https://www.readbyqxmd.com/read/28934648/evaluation-of-tooth-root-surface-area-using-a-three-dimensional-scanning-technique-and-cone-beam-computed-tomographic-reconstruction-in-vitro
#1
Tong Wang, Xibo Pei, Feng Luo, Lingling Jia, Han Qin, Xinting Cheng, Yiyuan Xue, Jian Wang, Qianbing Wan
OBJECTIVE: To study the feasibility of measuring root surface area (RSA) by 3D scanning technique and cone beam computed tomography (CBCT) reconstruction in vitro. DESIGN: Twenty extracted teeth (10 single-rooted teeth and 10 multi-rooted teeth) were collected in this study. The RSA of the extracted teeth was measured by the membrane technique, 3D scanning technique, and CBCT reconstruction. A standard part was also designed to check the accuracy of each method...
July 21, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28933523/the-use-of-3d-image-fusion-for-percutaneous-transluminal-angioplasty-and-stenting-of-iliac-artery-obstructions-validation-of-the-technique-and-systematic-review-of-literature
#2
Seline R Goudeketting, Stefan G Heinen, Daniel A VAN DEN Heuvel, Marco J VAN Strijen, Michiel W DE Haan, Cornelis H Slump, Jean-Paul DE Vries
BACKGROUND: The effect of the insertion of guidewires and catheters on fusion accuracy of the three-dimensional (3D) image fusion technique during iliac percutaneous transluminal angioplasty (PTA) procedures has not yet been investigated. METHODS: Technical validation of the 3D fusion technique was evaluated in 11 patients with common and/or external iliac artery lesions. A preprocedural contrast-enhanced magnetic resonance angiogram (CE-MRA) was segmented and manually registered to a cone-beam computed tomography image created at the beginning of the procedure for each patient...
September 20, 2017: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/28932947/integration-of-digital-dental-casts-in-cone-beam-computed-tomography-scans-a-clinical-validation-study
#3
Frits A Rangel, Thomas J J Maal, Martien J J de Koning, Ewald M Bronkhorst, Stefaan J Bergé, Anne Marie Kuijpers-Jagtman
OBJECTIVES: Images derived from cone beam computed tomography (CBCT) scans lack detailed information on the dentition and interocclusal relationships needed for proper surgical planning and production of surgical splints. To get a proper representation of the dentition, integration of a digital dental model into the CBCT scan is necessary. The aim of this study was to validate a simplified protocol to integrate digital dental models into CBCT scans using only one scan. MATERIALS AND METHODS: Conventional protocol A used one combined upper and lower impression and two CBCT scans...
September 20, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28932139/predictability-of-bone-density-at-posterior-mandibular-implant-sites-using-cone-beam-computed-tomography-intensity-values
#4
Mustafa Alkhader, Malik Hudieb, Yousef Khader
OBJECTIVE: The aim of this study was to investigate the predictability of bone density at posterior mandibular implant sites using cone-beam computed tomography (CBCT) intensity values. MATERIALS AND METHODS: CBCT cross-sectional images for 436 posterior mandibular implant sites were selected for the study. Using Invivo software (Anatomage, San Jose, California, USA), two observers classified the bone density into three categories: low, intermediate, and high, and CBCT intensity values were generated...
July 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28931867/accuracy-and-reliability-of-cone-beam-computed-tomography-for-linear-and-volumetric-mandibular-condyle-measurements-a-human-cadaver-study
#5
Verónica García-Sanz, Carlos Bellot-Arcís, Virginia Hernández, Pedro Serrano-Sánchez, Juan Guarinos, Vanessa Paredes-Gallardo
The accuracy of Cone-Beam Computed Tomography (CBCT) on linear and volumetric measurements on condyles has only been assessed on dry skulls. The aim of this study was to evaluate the reliability and accuracy of linear and volumetric measurements of mandibular condyles in the presence of soft tissues using CBCT. Six embalmed cadaver heads were used. CBCT scans were taken, followed by the extraction of the condyles. The water displacement technique was used to calculate the volumes of the condyles and three linear measurements were made using a digital caliper, these measurements serving as the gold standard...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931768/study-of-hepatic-artery-cone-beam-imaging-by-low-rate-injection-in-iodinated-contrast-agent
#6
Mitsuru Osawa, Tadafumi Takano, Akihiko Hanawa, Yasuhiro Minami, Hiroshi Miura
PURPOSE: CT during hepatic arteriography (CTHA) of cone-beam computed tomography (CBCT) provides valid information in performing transcatheter arterial chemo-embolization (TACE). The usefulness of CTHA with the diluted contrast medium has been reported in some medical conferences. However, the operation becomes somehow complicated for the medical institutions that have angiography injectors with a single head. In this study, we aimed to investigate the clinical equivalence of low-rate injection method and diluted injection method...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28931343/impact-of-bowel-gas-and-body-outline-variations-on-total-accumulated-dose-with-intensity-modulated-proton-therapy-in-locally-advanced-cervical-cancer-patients
#7
Thomas Berger, Jørgen Breede Baltzer Petersen, Jacob Christian Lindegaard, Lars Ulrik Fokdal, Kari Tanderup
INTRODUCTION: Density changes occurring during fractionated radiotherapy in the pelvic region may degrade proton dose distributions. The aim of the study was to quantify the dosimetric impact of gas cavities and body outline variations. MATERIAL AND METHODS: Seven patients with locally advanced cervical cancer (LACC) were analyzed through a total of 175 daily cone beam computed tomography (CBCT) scans. Four-beams intensity-modulated proton therapy (IMPT) dose plans were generated targeting the internal target volume (ITV) composed of: primary tumor, elective and pathological nodes...
September 21, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28926392/flexible-adult-acquired-flatfoot-deformity-comparison-between-weight-bearing-and-non-weight-bearing-measurements-using-cone-beam-computed-tomography
#8
Cesar de Cesar Netto, Lew C Schon, Gaurav K Thawait, Lucas Furtado da Fonseca, Apisan Chinanuvathana, Wojciech B Zbijewski, Jeffrey H Siewerdsen, Shadpour Demehri
BACKGROUND: The 3-dimensional nature of adult acquired flatfoot deformity can be challenging to characterize using radiographs. We tested the hypothesis that measurements on weight-bearing (WB) cone-beam computed tomography (CT) images were more useful for demonstrating the severity of the deformity than non-weight-bearing (NWB) measurements. METHODS: We prospectively enrolled 12 men and 8 women (mean age, 52 years; range, 20 to 88 years) with flexible adult acquired flatfoot deformity...
September 20, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28925991/a-multiscale-imaging-and-modelling-dataset-of-the-human-inner-ear
#9
Nicolas Gerber, Mauricio Reyes, Livia Barazzetti, Hans Martin Kjer, Sergio Vera, Martin Stauber, Pavel Mistrik, Mario Ceresa, Nerea Mangado, Wilhelm Wimmer, Thomas Stark, Rasmus R Paulsen, Stefan Weber, Marco Caversaccio, Miguel A González Ballester
Understanding the human inner ear anatomy and its internal structures is paramount to advance hearing implant technology. While the emergence of imaging devices allowed researchers to improve understanding of intracochlear structures, the difficulties to collect appropriate data has resulted in studies conducted with few samples. To assist the cochlear research community, a large collection of human temporal bone images is being made available. This data descriptor, therefore, describes a rich set of image volumes acquired using cone beam computed tomography and micro-CT modalities, accompanied by manual delineations of the cochlea and sub-compartments, a statistical shape model encoding its anatomical variability, and data for electrode insertion and electrical simulations...
September 19, 2017: Scientific Data
https://www.readbyqxmd.com/read/28924570/implementation-and-ct-sampling-characterization-of-a-third-generation-spect-ct-system-for-dedicated-breast-imaging
#10
Jainil P Shah, Steve D Mann, Randolph L McKinley, Martin P Tornai
Stand-alone cone beam computed tomography (CT) and single-photon emission computed tomography (SPECT) systems capable of complex acquisition trajectories have previously been developed for breast imaging. Fully three-dimensional (3-D) motions of SPECT systems provide views into the chest wall and throughout the entire volume. The polar tilting capability of the CBCT system has shown improvement in sampling close to the chest wall, while eliminating cone beam artifacts. Here, a single hybrid SPECT-CT system, with each individual modality capable of independently traversing complex trajectories around a common pendant breast volume, was developed...
July 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28924526/first-report-of-tripled-retromolar-foramina
#11
Puhan He, Joe Iwanaga, Mindy K Truong, Nimer Adeeb, R Shane Tubbs, Koh-Ichi Yamaki
The retromolar foramen (RMF) is the bony entrance of the retromolar canal, through which a neurovascular bundle runs. It is essential to locate such anatomic variants in a patient in order to avoid complications in surgery, implant placement, or anesthesia of the area. To our knowledge, there has only been one case report of supernumerary RMF, which reported one bilateral doubled retromolar foramina and one doubled left RMF. We present an extremely rare case in which a right triple RMF was observed on cone beam computed tomography in a cadaver...
July 7, 2017: Curēus
https://www.readbyqxmd.com/read/28921521/a-paradigm-for-evaluation-and-management-of-the-maxillary-sinus-before-dental-implantation
#12
Yi-Wei Chen, Fu-Ying Lee, Po-Hung Chang, Chi-Che Huang, Chia-Hsiang Fu, Chien-Chia Huang, Ta-Jen Lee
OBJECTIVES: To determine a paradigm for evaluating and managing maxillary sinus conditions before dental implantation via preoperative sinonasal assessment. STUDY DESIGN: Prospective cohort study. METHODS: Eighty-four patients who underwent dental implantation with or without sinus augmentation were included. Maxillary sinus conditions were classified into groups 1 to 6 according to cone-beam computed tomography (CT) findings: 1) nonspecific findings, 2) solitary polyp or cyst, 3) mucosal thickening, 4) air-fluid level or fluid accumulation, 5) near-total opacification of the maxillary or other paranasal sinus, and 6) calcification spots in the maxillary sinus...
September 16, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28920140/frequency-location-and-association-with-dental-pathology-of-mucous-retention-cysts-in-the-maxillary-sinus-a-radiographic-study-using-cone-beam-computed-tomography-cbct
#13
Andy Wai Kan Yeung, Ray Tanaka, Pek-Lan Khong, Thomas von Arx, Michael M Bornstein
OBJECTIVES: The purpose of the present study was to evaluate the frequency, locations, and dimensions of mucous retention cysts of the maxillary sinus and analyze potential associated dental pathology. MATERIALS AND METHODS: A total of 156 cone beam computed tomography (CBCT) scans were included in the analysis, resulting in an evaluation of 310 maxillary sinuses. The presence of mucous retention cysts (MRC) manifesting as dome-shaped radiopacities in the sinus was diagnosed...
September 17, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28920111/interpretation-of-cone-beam-computed-tomography-volumetric-data-how-to-report-findings
#14
Mel Mupparapu, Adriana G Creanga, Steven R Singer
Cone beam computed tomography (CBCT) was introduced to the dental profession at the beginning of the new millennium and has become an integral part of dental practice, especially within the surgical specialties. With advances in technology and the introduction of new-generation digital detectors, the concomitant increase in pixel resolution provided the ability to discern fine details of the anatomy. This article focuses on the methodology of CBCT interpretation and reporting. Details of reviewing the volume thoroughly are described with relevant citations...
2017: Quintessence International
https://www.readbyqxmd.com/read/28918912/evaluation-of-the-root-and-canal-systems-of%C3%A2-maxillary-molars-in-taiwanese-patients-a%C3%A2-cone%C3%A2-beam-computed-tomography-study
#15
Yu-Hua Lin, Hsiu-Na Lin, Chien-Chih Chen, May-Show Chen
BACKGROUND: This study evaluated variations in root canal configuration in the maxillary permanent molars of Taiwanese patients by analyzing patients' cone beam computed tomography (CBCT) images. Comparisons were made among these configurations and those previously reported. This information may serve as a basis for improving the success rate of endodontic treatment. METHODS: The root canal systems of 114 Taiwanese patients with bilateral maxillary first or second molars were examined using CBCT images...
August 2017: Biomedical Journal
https://www.readbyqxmd.com/read/28917071/quantitative-evaluation-of-palatal-bone-thickness-for-the-placement-of-orthodontic-miniscrews-in-adults-with-different-facial-types
#16
Yunji Wang, Ye Qiu, Henglang Liu, Jinlong He, Xiaoping Fan
To quantitatively evaluate palatal bone thickness in adults with different facial types using cone beam computed tomography (CBCT).  Methods: The CBCT volumetric data of 123 adults (mean age, 26.8 years) collected between August  2014 and August 2016 was retrospectively studied. The subjects were divided into a low-angle group (39 subjects), a normal-angle group (48 subjects) and a high-angle group (36 subjects) based on facial types assigned by cephalometric radiography. The thickness of the palatal bone was assessed at designated points...
October 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28916139/online-adaptive-radiation-therapy
#17
REVIEW
Stephanie Lim-Reinders, Brian M Keller, Shahad Al-Ward, Arjun Sahgal, Anthony Kim
The current paradigm of radiation therapy has the treatment planned on a snapshot dataset of the patient's anatomy taken at the time of simulation. Throughout the course of treatment, this snapshot may vary from initial simulation. Although there is the ability to image patients within the treatment room with technologies such as cone beam computed tomography, the current state of the art is largely limited to rigid-body matching and not accounting for any geometric deformations in the patient's anatomy. A plan that was once attuned to the initial simulation can become suboptimal as the treatment progresses unless improved technologies are brought to bear...
April 24, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28914631/evaluation-of-buccal-bone-concavity-in-the-esthetic-zone-a-cadaver-study
#18
Ming-Pang Chung, I-Ching Wang, Hsun-Liang Chan, Hom-Lay Wang
PURPOSE: The primary aim of this study was to evaluate the buccal bone concavity position and depth in the anterior maxilla. The accuracy of cone beam computed tomography (CBCT) to measure the buccal bone concavity was also investigated. MATERIAL AND METHODS: Eleven fresh cadaver heads were used in this study. CBCT images were first acquired, on which the location and depth of the buccal bone concavity were measured in maxillary incisors and canines. After full-thickness mucoperiosteal flap reflection, the corresponding measurements were made directly on cadavers...
September 13, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28901684/comparison-of-initial-patient-setup-accuracy-between-surface-imaging-and-three-point-localization-a-retrospective-analysis
#19
Dennis N Stanley, Kristen A McConnell, Neil Kirby, Alonso N Gutiérrez, Nikos Papanikolaou, Karl Rasmussen
PURPOSE: Historically, the process of positioning a patient prior to imaging verification used a set of permanent patient marks, or tattoos, placed subcutaneously. After aligning to these tattoos, plan specific shifts are applied and the position is verified with imaging, such as cone-beam computed tomography (CBCT). Due to a variety of factors, these marks may deviate from the desired position or it may be hard to align the patient to these marks. Surface-based imaging systems are an alternative method of verifying initial positioning with the entire skin surface instead of tattoos...
September 13, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28901659/using-gamma-index-to-flag-changes-in-anatomy-during-image-guided-radiation-therapy-of-head-and-neck-cancer
#20
Bryan Schaly, Jeff Kempe, Varagur Venkatesan, Sylvia Mitchell, Jerry J Battista
During radiation therapy of head and neck cancer, the decision to consider replanning a treatment because of anatomical changes has significant resource implications. We developed an algorithm that compares cone-beam computed tomography (CBCT) image pairs and provides an automatic alert as to when remedial action may be required. Retrospective CBCT data from ten head and neck cancer patients that were replanned during their treatment was used to train the algorithm on when to recommend a repeat CT simulation (re-CT)...
September 13, 2017: Journal of Applied Clinical Medical Physics
keyword
keyword
23433
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"