Soft Tissue Hyperdensities

Scarfe, William C.; Farman, Allan G.; Angelopoulos, Christos

doi:10.1007/978-3-319-62061-9_17

Cited by 6 publications

(11 citation statements)

References 45 publications

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“…According to Scarfe and Farman [ 23 ], the incidence of CAC detected on panoramic images varies between 0.1% and 3.2% in patients aged 50 years and older, and rises in populations at high atherosclerotic risk (smokers, obese, inactive, suffering from hypercholesterolemia, etc.).…”

Section: Discussionmentioning

confidence: 99%

Carotid Artery Calcification: A Digital Panoramic-Based Study

Nasseh

Aoun

2018

Diseases

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Objective: The aim of this study was to estimate the incidence of carotid artery calcification (CAC) in a sample of Lebanese population using digital panoramic radiographs. Materials and Methods: Panoramic radiographs of 500 patients (281 females and 219 males), aged between 18 and 88 years (mean: 47.9 years), were assessed for CAC. Data collected were analyzed statistically using IBM® SPSS® for Windows version 20.0 (SPSS, Chicago, IL, USA). Results: CAC were found in 34 cases (6.8%), among them, 23 females (8.18%) and 11 males (5.02%). Six of all the calcifications were on the right side, against six on the left side, and 22 on both sides. The mean age of patients affected with CAC was 60.9 years (ranging from 18 to 88 years). Chi-square test showed no statistical significance between gender and CAC, while Spearman correlation analysis showed positive low correlation with age (r = 0.179). Conclusion: CAC can be found on routine panoramic radiographs taken in dental clinics; dentists should automatically refer the patients in question for specialized medical evaluation.

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Section: Discussionmentioning

confidence: 99%

Carotid Artery Calcification: A Digital Panoramic-Based Study

Nasseh

Aoun

2018

Diseases

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“…Cone‐beam computed tomography (CBCT) has emerged over the past two decades as a rapid acquisition technology that has transformed 2D images into a 3D anatomically volumetric dataset 4 . Such advances in technology provide a high degree of clinical imaging efficiency, volumetric visualization, anatomic accuracy, and data integration 5 that allow practitioners to view the craniofacial complex in high spatial detail, all of which were previously unavailable for orthodontic assessment with 2D imaging, 4 thereby expanding the role of imaging in craniofacial and dentoalveolar diagnosis 6 …”

Section: Introductionmentioning

confidence: 99%

Cone‐beam computed tomography use in postgraduate orthodontic programs in North America and Europe

Guberman

Chung

2023

Journal of Dental Education

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Objectives Cone‐beam computed tomography (CBCT) has emerged over recent decades as a rapid acquisition technology that allows practitioners to view the craniofacial complex in high spatial detail. This study aimed to assess the latest trend of CBCT use in postgraduate orthodontic programs in North America and Europe/Australia. Methods An electronic multiple‐choice survey was sent via email requesting anonymous participation of postgraduate orthodontic program directors: 73 in North America (as listed on the American Association of Orthodontists website) and 189 in Europe/Australia (as listed on the European Orthodontic Society website). Survey collection was over a 2‐month period with two follow‐up emails sent 2 weeks and 1 month after the initial email to each program director who had not responded. Responses were collected directly on Qualtrics for analysis. Results The response rate was 46.6% (34 responses) for North America and 11.1% (21 responses) for Europe/Australia. Results revealed that 100% of respondents from North America had access to a CBCT scanner, while 90.48% of respondents (19 responses) from Europe/Australia had access. Most North American postgraduate orthodontic programs have CBCT scanners within their clinic, while most European/Australian programs do not, and they refer patients to the radiology department. Although there is a higher percentage of programs in North America compared to Europe/Australia that use CBCT as part of routine orthodontic records for all patients, most programs in both regions use CBCT imaging for specific diagnostic purposes and not for routine records. Conclusion Overall, North American programs have more access to CBCT scanners in postgraduate clinics and use CBCT imaging more routinely than European/Australian programs.

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“…Metal artifacts were reduced in the virtual monoenergetic images synthesized at high energies. The results demonstrated the feasibility of high quality DE-CBCT imaging by spectral filtration without using either an energy sensitive detector or rapid high voltage switching.Cone beam computed tomography (CBCT) is used extensively in medical and dental imaging, providing high isotropic resolution volumetric images at a relatively low radiation dose, cost, and footprint compared to multidetector computed tomography (MDCT) [1][2][3] . Most of the current CBCT scanners acquire images using a polychromatic X-ray beam with a broad energy spectrum.…”

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confidence: 99%

“…DECT and spectral CT are increasingly used in medical imaging [7][8][9] .DE-CBCT has been shown to improve the accuracy of the CT Hounsfield Unit (HU) values and bone mineral density (BMD), enable materials quantification and reduce metal artifacts by synthesizing VMIs 6,10-14 , compared to a conventional CBCT. The presence of strong metal artifacts, caused by beam hardening and photon starvation from strongly attenuating materials, is especially a pressing issue in maxillofacial imaging because of the prevalence of patients with dental restorations such as dental implants 2,15 .Despite these promises, DE-CBCT has not been widely adopted for clinical imaging, partially due to the increased equipment cost, which can be prohibitive, especially for small dental clinics. Several methods have been reported to acquire DE-CBCT images, including using two source-detector pairs 16 , multiple x-ray tubes and a single detector 17 , kV switching 13,18 , and dual layer detector [10][11][12] .…”

mentioning

confidence: 99%

“…Cone beam computed tomography (CBCT) is used extensively in medical and dental imaging, providing high isotropic resolution volumetric images at a relatively low radiation dose, cost, and footprint compared to multidetector computed tomography (MDCT) [1][2][3] . Most of the current CBCT scanners acquire images using a polychromatic X-ray beam with a broad energy spectrum.…”

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confidence: 99%

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Low-cost dual-energy CBCT by spectral filtration of a dual focal spot X-ray source

Li,

Hu,

et al. 2024

Sci Rep

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Dual-energy cone beam computed tomography (DE-CBCT) has been shown to provide more information and improve performance compared to a conventional single energy spectrum CBCT. Here we report a low-cost DE-CBCT by spectral filtration of a carbon nanotube x-ray source array. The x-ray photons from two focal spots were filtered respectively by a low and a high energy filter. Projection images were collected by alternatively activating the two beams while the source array and detector rotated around the object, and were processed by a one-step materials decomposition and reconstruction method. The performance of the DE-CBCT scanner was evaluated by imaging a water-equivalent plastic phantom with inserts containing known densities of calcium or iodine and an anthropomorphic head phantom with dental implants. A mean energy separation of 15.5 keV was achieved at acceptable dose rates and imaging time. Accurate materials quantification was obtained by materials decomposition. Metal artifacts were reduced in the virtual monoenergetic images synthesized at high energies. The results demonstrated the feasibility of high quality DE-CBCT imaging by spectral filtration without using either an energy sensitive detector or rapid high voltage switching.

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Soft Tissue Hyperdensities

Cited by 6 publications

References 45 publications

Carotid Artery Calcification: A Digital Panoramic-Based Study

Carotid Artery Calcification: A Digital Panoramic-Based Study

Cone‐beam computed tomography use in postgraduate orthodontic programs in North America and Europe

Low-cost dual-energy CBCT by spectral filtration of a dual focal spot X-ray source

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