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2D low-dose single-slice abdominal computed tomography (CT) slice enables direct measurements of body composition, which are critical to quantitatively characterizing health relationships on aging. However, longitudinal analysis of body…

Image and Video Processing · Electrical Eng. & Systems 2022-09-30 Xin Yu , Qi Yang , Yucheng Tang , Riqiang Gao , Shunxing Bao , LeonY. Cai , Ho Hin Lee , Yuankai Huo , Ann Zenobia Moore , Luigi Ferrucci , Bennett A. Landman

We investigate a long-term (26 years, from 1987 to 2013) variability in the broad spectral line properties of the radio galaxy Arp 102B, an active galaxy with broad double-peaked emission lines. We use observations presented in Paper I…

Context. To date, more than a hundred debris disks have been spatially resolved. Among them, the young system HD 120326 stands out, displaying different disk substructures on both intermediate (30-150 au) and large (150-1000 au) scales.…

The surface roughness of a recently exhumed strikeslip fault plane has been measured by three independent 3D portable laser scanners. Digital elevation models of several fault surface areas, from 1 m2 to 600 m2, have been measured at a…

Geophysics · Physics 2008-01-04 Francois Renard , Christophe Voisin , Davd Marsan , Jean Schmittbuhl

With "contact surface area" (CSA) we refers to the area of contact between a tumor and an organ. This indicator has been identified as a predictive factor for surgical peri-operative parameters, particularly in the context of kidney cancer.…

Image and Video Processing · Electrical Eng. & Systems 2024-03-03 Alessandra Bulanti , Alessandro Carfì , Paolo Traverso , Carlo Terrone , Fulvio Mastrogiovanni

Purpose: Understanding how the pancreas changes is critical for detecting deviations in type 2 diabetes and other pancreatic disease. We measure pancreas size and shape using morphological measurements from ages 0 to 90. Our goals are to 1)…

This is the first paper in a series devoted to systematic study of the size and structure of the broad-line region (BLR) in active galactic nuclei (AGNs) using reverberation mapping (RM) data. We employ a recently developed Bayesian…

Cosmology and Nongalactic Astrophysics · Physics 2014-01-07 Yan-Rong Li , Jian-Min Wang , Luis C. Ho , Pu Du , Jin-Ming Bai

Robotic ultrasound (US) imaging aims at overcoming some of the limitations of free-hand US examinations, e.g. difficulty in guaranteeing intra- and inter-operator repeatability. However, due to anatomical and physiological variations…

Robotics · Computer Science 2022-08-11 Zhongliang Jiang , Yuan Gao , Le Xie , Nassir Navab

Purpose: To examine whether incorporating anatomical awareness into a deep learning model can improve generalizability and enable prediction of disease progression. Methods: This retrospective multicenter study included conventional pelvic…

We study the buoyant rise of magnetic flux tubes embedded in an adiabatic stratification using two-and three-dimensional, MHD simulations. We analyze the dependence of the tube evolution on the field line twist and on the curvature of the…

Solar and Stellar Astrophysics · Physics 2015-11-18 Juan Martinez-Sykora , Fernando Moreno-Insertis , Mark C. M. Cheung

Hubble Space Telescope (HST) spectroscopy of the Seyfert 1.5 galaxy, NGC 3227, confirms previous reports that the broad H-alpha emission line flux is time variable, decreasing by a modest ~ 11% between 1999 and 2000 in response to a…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 Nick Devereux

Results of a long-term monitoring ($\gtrsim 10$ years) of the broad line and continuum fluxes of three Active Galactic Nuclei (AGN), 3C 390.3, NGC 4151, and NGC 5548, are presented. We analyze the H$\alpha$ and H$\beta$ profile variations…

Context: There is a lively debate about the solar oxygen abundance and the role of 3D models in its recent downward revision. The models have been tested using high resolution solar atlases. Further testing can be done using centre-to-limb…

Solar and Stellar Astrophysics · Physics 2015-05-14 Tiago M. D. Pereira , Martin Asplund , Dan Kiselman

Vestibular Schwannoma is a benign brain tumour that grows from one of the balance nerves. Patients may be treated by surgery, radiosurgery or with a conservative "wait-and-scan" strategy. Clinicians typically use manually extracted linear…

Image and Video Processing · Electrical Eng. & Systems 2024-06-05 Navodini Wijethilake , Steve Connor , Anna Oviedova , Rebecca Burger , Tom Vercauteren , Jonathan Shapey

The combination of the linear size from reverberation mapping (RM) and the angular distance of the broad line region (BLR) from spectroastrometry (SA) in active galactic nuclei (AGNs) can be used to measure the Hubble constant $H_0$.…

Astrophysics of Galaxies · Physics 2021-06-28 Xiaer Zhang , Zhicheng He , Tinggui Wang , Hengxiao Guo

The Ha line, one of the most studied chromospheric diagnostics, is a tracer for magnetic field structures, while its line core intensity provides an estimate of the mass density. The brightness temperatures from Atacama Large…

Solar and Stellar Astrophysics · Physics 2024-04-29 Sneha Pandit , Sven Wedemeyer , Mats Carlsson , Mikołaj Szydlarski

The ALMA SPECtroscopic Survey in the {\it Hubble} Ultra Deep Field is an ALMA large program that obtained a frequency scan in the 3\,mm band to detect emission lines from the molecular gas in distant galaxies. We here present our search…

We present the phase characteristics study of the Atacama Large Millimeter/submillimeter Array (ALMA) long (up to 3 km) baseline, which is the longest baseline tested so far using ALMA. The data consist of long time-scale (10 - 20 minutes)…

Instrumentation and Methods for Astrophysics · Physics 2015-06-23 Satoki Matsushita , Yoshiharu Asaki , Ryohei Kawabe , Ed Fomalont , Denis Barkats , Stuartt Corder

Here we present the long-term optical spectral monitoring of a changing-look active galactic nuclei (AGN) NGC 3516 that covers 22 years (from 1996 to 2018). We explore a variability in the broad lines and continuum, finding that the…

Extending the spacetime manifold of general relativity (GR) to incorporate the Hubble expansion of space as a specific curvature, generates a modified solution with three additional non-zero Christoffel symbols and a reformulated Ricci…

General Physics · Physics 2022-07-04 John Herbert Marr