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Relationship between Hounsfield Unit in CT Scan and Gray Scale in CBCT
Journal of Dental Research, Dental Clinics, Dental Prospects, 2014 Background and aims. Cone-beam computed tomography (CBCT) is an imaging system which has many advantages over computed tomography (CT). In CT scan, Hounsfield Unit (HU) is proportional to the degree of x-ray attenuation by the tissue.
Tahmineh Razi +2 more
doaj +4 more sources
The Gray graph is a unit-distance graph [PDF]
The Art of Discrete and Applied Mathematics, 2023 In this note we give a construction proving that the Gray graph, which is the smallest cubic semi-symmetric graph, is a unit-distance graph.
Berman, Leah Wrenn +2 more
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Gray wolf optimizer with bubble-net predation for modeling fluidized catalytic cracking unit main fractionator [PDF]
Scientific Reports, 2022 Fluidized catalytic cracking unit (FCCU) main fractionator is a complex system with multivariable, nonlinear and uncertainty. Its modeling is a hard nut to crack. Ordinary modeling methods are difficult to estimate its dynamic characteristics accurately.
Xiaojing Wang +3 more
doaj +2 more sources
Comparison of the Hounsfield unit in CT scan with the gray level in cone-beam CT [PDF]
Journal of Dental Research, Dental Clinics, Dental Prospects, 2019 Background. The present study was undertaken to compare the Hounsfield Unit (HU) in computed tomography (CT) with the gray level in CBCT in human tissues. Methods. In this study, 25 different soft and hard tissues were evaluated in 21 patients.
Tahmineh Razi +3 more
doaj +3 more sources
Can gray values be converted to Hounsfield units? A systematic review [PDF]
Dentomaxillofacial Radiology, 2022 Objectives: The purpose of this systematic review was to answer the focus question: “Could the gray values (GVs) from CBCT (cone beam computed tomography) be converted to Hounsfield units (HUs) in multidetector computed tomography (MDCT)?” Methods: The included studies try to answer the research question according to the PICO strategy.
Marjorie, Eguren +6 more
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When Gray Markets Have Silver Linings: All-Unit Discounts, Gray Markets and Channel Management
SSRN Electronic Journal, 2012 Gray markets are unauthorized channels of distribution for a supplier's authentic products. We study a distribution channel that consists of a supplier who offers all-unit quantity discounts for batch orders to enjoy cost savings, and a reseller who may divert some goods to the gray markets.
Hu, Ming +2 more
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Can gray whale management units be assessed using mitochondrial DNA?
J. Cetacean Res. Manage., 2023 Although most eastern North Pacific gray whales (Eschrichtius robustus) feed in Alaskan waters north of the Aleutian peninsula, some have been reported as long-term feeding residents in more southern waters ranging from northern California to southeast Alaska.
Uma Ramakrishnan, Barbara L. Taylor
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Reflectance of Gray and White Compressed Concrete Paving Units with Different Surfaces [PDF]
Advances in Engineering Research, 2015 This study aims to measure the reflectance of outdoor compressed concrete paving units. The samples are in common size of compressed concrete paving units which is 20cm * 20cm * 6cm. The first cause of gradually worsening environment is that most of artificial pavements and building shells in the cities are made of materials at low reflectance, so that
Lin Yu-Hsin, Lee Soen-Han, Yan Bin-Feng
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Gaze detection via self-organizing gray-scale units [PDF]
Proceedings International Workshop on Recognition, Analysis, and Tracking of Faces and Gestures in Real-Time Systems. In Conjunction with ICCV'99 (Cat. No.PR00378), 2003 We present a gaze estimation algorithm that detects an eye in a face image and estimates the gaze direction by computing the position of the pupil with respect to the center of the eye. The algorithm is information conserving and based on unsupervised learning.
M. Betke, J. Kawai
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Indian Journal of Dental Research, 2017 Purpose: Hounsfield unit (HU) provides a quantitative evaluation of bone density. The assessment of bone density is essential for successful treatment plan. Although, multislice computed tomography (MSCT) is considered as gold standard in evaluating bone
Sanjana Patrick +4 more
doaj +2 more sources