We theoretically investigate the tomographic reconstruction of the three-dimensional photonic environment of nanoparticles. As input for our reconstruction we use electron energy loss spectroscopy (EELS) maps for different rotation angles. We perform the tomographic reconstruction of surface polariton fields for smooth and rough nanorods and compare the reconstructed and simulated photonic local density of states, which are shown to be in very good agreement. Using these results, we critically examine the potential of our tomography scheme and discuss limitations and directions for future developments.
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http://dx.doi.org/10.1021/acsphotonics.2c01431 | DOI Listing |
Med Image Anal
January 2025
Machine Intelligence in Clinical Neuroscience & Microsurgical Neuroanatomy (MICN) Laboratory, Department of Neurosurgery, Clinical Neuroscience Center, University Hospital Zurich, University of Zurich, Zurich, Switzerland. Electronic address:
Ann Thorac Surg Short Rep
December 2024
Division of Cardiac Surgery, Inova Heart and Vascular Institute, Inova Health Systems, Falls Church, Virginia.
Background: DeBakey type I aortic dissections (AD) are most frequently treated with hemiarch repair. A subset of patients demonstrates persistent distal end-organ ischemia secondary to persistent true lumen (TL) compression. We describe the use of bare metal stent grafting across the residual arch dissection with the Zenith Dissection Endovascular Stent (ZDES, Cook Medical) in 7 patients with type I AD that was repaired in a hemiarch configuration with a compromised distal TL and organ malperfusion.
View Article and Find Full Text PDFPhys Med Biol
January 2025
Department of Radiology, University of Chicago, 5841 South Maryland Avenue, Chicago, IL 60637, USA, Chicago, 60637, UNITED STATES.
Objective: Accurate image reconstruction from data with truncation in X-ray computed tomography (CT) remains a topic of research interest; and the works reported previously in the literature focus largely on reconstructing an image only within the scanning field-of-view (FOV). We develop algorithms to invert the data model with truncation for accurate image reconstruction within the entire subject support or a region slightly smaller than the subject support.
Methods: We formulate image reconstruction from data with truncation as an optimization program, which includes hybrid constraints on image total variation (TV) and image L1-norm for effectively suppressing truncation artifacts.
PLoS One
January 2025
Department of Ophthalmology, Pennsylvania State University, Hershey, PA, United States of America.
Purpose: To investigate different measures for corneal astigmatism in the context of reconstructed corneal astigmatism (recCP) as required to correct the pseudophakic eye, and to derive prediction models to map measured corneal astigmatism to recCP.
Methods: Retrospective single centre study of 509 eyes of 509 cataract patients with monofocal (MX60P) IOL. Corneal power measured with the IOLMaster 700 keratometry (IOLMK), and Galilei G4 keratometry (GK), total corneal power (TCP2), and Alpin's integrated front (CorT) and total corneal power (CorTTP).
Phys Med Biol
January 2025
Capital Normal University, 105, North West Sanhuan Road, Haidian District, Beijing, Beijing, None Selected, 100048, CHINA.
Objective: Low-dose computed tomography (LDCT) has gained significant attention in hospitals and clinics as a popular imaging modality for reducing the risk of X-ray radiation. However, reconstructed LDCT images often suffer from undesired noise and artifacts, which can negatively impact diagnostic accuracy. This study aims to develop a novel approach to improve LDCT imaging performance.
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