Christopher E. Kehayias

ORCID: 0009-0009-1513-681X
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Advanced Radiotherapy Techniques
  • Radiomics and Machine Learning in Medical Imaging
  • Medical Imaging and Analysis
  • Prostate Cancer Diagnosis and Treatment
  • Chalcogenide Semiconductor Thin Films
  • Cardiac Imaging and Diagnostics
  • Advanced Chemical Sensor Technologies
  • Quantum Dots Synthesis And Properties
  • Carbon Nanotubes in Composites
  • Graphene research and applications
  • 2D Materials and Applications
  • Lung Cancer Diagnosis and Treatment
  • Analytical Chemistry and Sensors
  • Ultrasound and Hyperthermia Applications
  • Management of metastatic bone disease
  • Force Microscopy Techniques and Applications
  • ZnO doping and properties
  • Chemotherapy-induced cardiotoxicity and mitigation
  • Advanced biosensing and bioanalysis techniques
  • Gas Sensing Nanomaterials and Sensors
  • Advanced Thermoelectric Materials and Devices
  • Molecular Communication and Nanonetworks
  • Radioactivity and Radon Measurements
  • MXene and MAX Phase Materials
  • Esophageal Cancer Research and Treatment

Dana-Farber Brigham Cancer Center
2023-2024

Brigham and Women's Hospital
2023-2024

Harvard University
2023-2024

University of Pennsylvania
2017-2024

Dana-Farber Cancer Institute
2023-2024

Mass General Brigham
2023-2024

Tufts University
2013

Large-area growth of monolayer films the transition metal dichalcogenides is utmost importance in this rapidly advancing research area. The mechanical exfoliation method offers high quality material but it a problematic approach when applied to materials that are not air stable. One important example 1T'-WTe2, which multilayer form reported possess large non saturating magnetoresistance, pressure induced superconductivity, and weak antilocalization effect, electrical data for yet be due its...

10.1088/2053-1583/aa5921 article EN 2D Materials 2017-02-02

Heterostructures of transition metal dichalcogenides (TMDs) offer the attractive prospect combining distinct physical properties derived from different TMD structures. Here, we report direct chemical vapor deposition in-plane monolayer heterostructures based on 1H-MoS2 and 1T'-MoTe2. The large lattice mismatch between these materials led to intriguing phenomena at their interface. Atomic force microscopy indicated buckling in 1H region. Tip-enhanced Raman spectroscopy showed mode structure...

10.1021/acsnano.7b03828 article EN ACS Nano 2017-08-02

Reduced Graphene Oxide (RGO) is an electronically hybrid material that displays remarkable chemical sensing properties. Here, we present a quantitative analysis of the gating effects in RGO-based sensors. The gas devices are patterned field-effect transistor geometry, by dielectrophoretic assembly RGO platelets between gold electrodes deposited on SiO2/Si substrates. We show these sensors display highly selective and reversible responses to measured analytes, as well fast response recovery...

10.1088/0957-4484/24/24/245502 article EN cc-by Nanotechnology 2013-05-23

Introduction Artificial intelligence (AI)-based technologies embody countless solutions in radiation oncology, yet translation of AI-assisted software tools to actual clinical environments remains unrealized. We present the Deep Learning On-Demand Assistant (DL-ODA), a fully automated, end-to-end platform that enables AI interventions for any disease site featuring an automated model-training pipeline, auto-segmentations, and QA reporting. Materials methods developed, tested, prospectively...

10.3389/fonc.2023.1305511 article EN cc-by Frontiers in Oncology 2024-01-04

Manual segmentation of tumors and organs-at-risk (OAR) in 3D imaging for radiation-therapy planning is time-consuming subject to variation between different observers. Artificial intelligence (AI) can assist with segmentation, but challenges exist ensuring high-quality especially small, variable structures, such as the esophagus. We investigated effect quality style physicians training deep-learning models esophagus proposed a new metric, edge roughness, evaluating/quantifying slice-to-slice...

10.1038/s41598-023-50382-z article EN cc-by Scientific Reports 2024-01-30

2D transition metal dichalcogenides have been studied extensively in the field of electronics and photonics. Among them, molybdenum chalcogenides receiving considerable attention due to their potential usage field‐effect transistors biosensors. Despite such promising aspects these materials, studies regarding temperature effects on MoSe remain relatively rare. Herein, Mo x Se y ( = 0 ≈ 10, 2) thin films are fabricated by radio frequency (RF) magnetron cosputtering silicon investigated using...

10.1002/pssa.202300477 article EN physica status solidi (a) 2023-09-19

Copper‐based metal chalcogenides are versatile materials used for a variety of electronic devices, yet realizing the full scope copper‐based composite is hindered by limited understanding their chemical properties. In this work, copper selenide thin films (TFs) fabricated using radio frequency (RF) magnetron co‐sputtering to investigate effects composition and annealing temperature on films. The surface TFs examined energy dispersive X‐Ray spectroscopy (EDS) photoelectron (XPS). unannealed...

10.1002/pssa.202400618 article EN physica status solidi (a) 2024-10-29

For trans-rectal ultrasound (TRUS)-based high dose rate (HDR) prostate brachytherapy, contouring can be challenging due to artifacts from implanted needles, bleeding, and calcifications.To evaluate the geometric accuracy observer preference of an artificial intelligence (AI) algorithm for generating contours on TRUS images with needles.We conducted a retrospective study 150 patients, who underwent HDR brachytherapy. These patients were randomly divided into training (104), validation (26)...

10.1002/mp.16716 article EN Medical Physics 2023-09-04

5544 Background: All cells release volatile organic compounds (VOCs) which emanate from body fluids. Our previous preliminary proof of concept study demonstrated that VOCs released tissue and plasma ovarian cancer patients are distinct those samples with benign tumors controls. We seek to create a sensitive specific, high-throughput screening test for based on analysis using novel nanosensors, first targeting cancers limited clinical modalities. In this we use these sensors distinguish vapor...

10.1200/jco.2021.39.15_suppl.5544 article EN Journal of Clinical Oncology 2021-05-20
Coming Soon ...