Constantine A. Raptis

ORCID: 0000-0003-0924-2447
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About
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Research Areas
  • Glass properties and applications
  • Phase-change materials and chalcogenides
  • Aortic Disease and Treatment Approaches
  • Trauma Management and Diagnosis
  • Aortic aneurysm repair treatments
  • Solid-state spectroscopy and crystallography
  • Ultrasound in Clinical Applications
  • Venous Thromboembolism Diagnosis and Management
  • Radiomics and Machine Learning in Medical Imaging
  • High-pressure geophysics and materials
  • Chalcogenide Semiconductor Thin Films
  • Cardiac Valve Diseases and Treatments
  • Advanced X-ray and CT Imaging
  • Radiation Dose and Imaging
  • Crystal Structures and Properties
  • Lung Cancer Diagnosis and Treatment
  • Appendicitis Diagnosis and Management
  • Advanced MRI Techniques and Applications
  • Cardiac Imaging and Diagnostics
  • Advanced Chemical Physics Studies
  • Congenital Diaphragmatic Hernia Studies
  • COVID-19 diagnosis using AI
  • COVID-19 and healthcare impacts
  • Radiology practices and education
  • Interstitial Lung Diseases and Idiopathic Pulmonary Fibrosis

Washington University in St. Louis
2014-2025

Mallinckrodt (United States)
2016-2025

Brigham and Women's Hospital
2022-2024

Duke University
2022-2024

Massachusetts General Hospital
2022

Saint Louis University Hospital
2022

Indiana University – Purdue University Indianapolis
2022

Cleveland Clinic
2022

Emory University
2022

Harvard University
2022

Silicon-rich silicon oxide thin films have been prepared by thermal evaporation of monoxide in vacuum. The SiOx film composition (1.1⩽ x ⩽1.7) has controlled varying the deposition rate and residual pressure chamber. Long time stability all ensured a postdeposition annealing at 523 K for 30 min Ar atmosphere. Some were further annealed 973 some others 1303 K. Raman scattering measurements implied formation amorphous nanoparticles Si nanocrystals latter conclusion is strongly supported high...

10.1063/1.1504176 article EN Journal of Applied Physics 2002-10-07

e-Cigarette or vaping-induced lung injury (EVALI) causes a spectrum of CT patterns. Relative frequencies and associations with vaping behavior are unknown.What the imaging findings patterns in EVALI what is relationship to behavior?CT scans 160 subjects from 15 institutions were retrospectively reviewed. defined agreed on via consensus. The parenchymal organizing pneumonia (OP) pattern was as regional diffuse ground-glass opacity (GGO) ± consolidation without centrilobular nodules (CNs). An...

10.1016/j.chest.2021.04.054 article EN cc-by-nc-nd CHEST Journal 2021-05-03

The temperature dependence of Raman spectra cubic yttria-stabilized zirconia (YSZ) for three yttria concentrations (10, 15, and 20 wt %) is investigated in the range 40--1470 K. variation with implies that first-order scattering (one-phonon processes) dominant this material, providing further evidence broad features observed are caused mainly by partial lattice disorder rather than combination (higher-order) processes. high-temperature phase YSZ entirely stable remains throughout....

10.1103/physrevb.51.201 article EN Physical review. B, Condensed matter 1995-01-01

Hemoptysis, which is defined as expectoration of blood from the alveoli or airways lower respiratory tract, an alarming clinical symptom with extensive differential diagnosis. CT has emerged important noninvasive tool in evaluation patients hemoptysis, and authors present a systematic but flexible approach to interpretation. The first step this involves identifying findings parenchymal airway hemorrhage. second aimed at determining mechanism hemoptysis whether specific vascular supply can be...

10.1148/rg.2021200150 article EN Radiographics 2021-05-01

The Raman spectra of single crystals ${\mathrm{LiTaO}}_{3}$ have been studied over two phases in the temperature range 290--1200 K. Assignments normal modes both ferroelectric and paraelectric are given using data from several scattering configurations taking into account directional properties (in phase) dependence observed phonons. number each phase (13 optical branches 5 indicates a transition ${C}_{3v}$ to ${D}_{3d}$ symmetry, result that is agreement with diffraction data. Most soften...

10.1103/physrevb.38.10007 article EN Physical review. B, Condensed matter 1988-11-15

We have performed a theoretical and experimental study of the structural stability terbium phosphate at high pressures. Theoretical ab initio total-energy lattice-dynamics calculations together with x-ray diffraction experiments allowed us to completely characterize phase transition $\ensuremath{\sim}9.8\text{ }\text{GPa}$ from zircon monazite structure. Furthermore, been check relative 17 candidate structures different pressures allow propose...

10.1103/physrevb.81.144126 article EN Physical Review B 2010-04-30

Single-Contrast CT for Detecting Bowel Injuries in Penetrating Abdominopelvic TraumaHamza Jawad1, Constantine Raptis1, Aaron Mintz1, Douglas Schuerer2 and Vincent Mellnick1Audio Available | Share

10.2214/ajr.17.18496 article EN American Journal of Roentgenology 2018-02-07
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