arXiv: Medical Physics
Papers
2,929
Papers 2,864
1 page of 287 pages (2,864 results)
#2Luca CalatroniH-Index: 10
Last. Laure Blanc-FéraudH-Index: 24
view all 4 authors...
We propose a 3D super-resolution approach to improve both lateral and axial spatial resolution in Total Internal Reflectance Fluorescence (TIRF) imaging applications. Our approach, called 3D-COL0RME (3D-Covariance-based l 0 super-Resolution Microscopy with intensity Estimation) improves both lateral and axial resolution by combining sparsity-based modelling for precise molecule localisation and intensity estimation in the lateral plane with a 3D reconstruction procedure in the axial one using Mu...
#1Vojtěch Kulvait (OvGU: Otto-von-Guericke University Magdeburg)H-Index: 1
#2Philip Hoelter (FAU: University of Erlangen-Nuremberg)H-Index: 8
Last. Georg Rose (OvGU: Otto-von-Guericke University Magdeburg)H-Index: 19
view all 4 authors...
CT perfusion imaging (CTP) plays an important role in decision making for the treatment of acute ischemic stroke with large vessel occlusion. Since the CT perfusion scan time is approximately one minute, the patient is exposed to a non-negligible dose of ionizing radiation. However, further dose reduction increases the level of noise in the data and the resulting perfusion maps. We present a method for reducing noise in perfusion data based on dimension reduction of time attenuation curves. For ...
#1Minjae KimH-Index: 7
#2Kang Won LeeH-Index: 2
Last. Joon-Mo YangH-Index: 12
view all 10 authors...
There has been a longstanding expectation that the optical resolution embodiment of photoacoustic tomography could have a substantial impact on gastrointestinal endoscopy by enabling microscopic visualization of the vasculature based on the endogenous contrast mechanism. Although multiple studies have demonstrated the in vivo imaging capability of a developed imaging device over the last decade, the implementation of such an endoscopic system that can be applied immediately when necessary via th...
#1Ozlem DagliH-Index: 3
#2A. Güneş Tanır (Gazi University)H-Index: 1
Last. Gökhan KurtH-Index: 14
view all 3 authors...
The Monte Carlo method is widely used in the Gamma Knife dose distribution calculations. In this study, Monte-Carlo simulation with Geant4 was applied to determine Leksell Gamma Knife dose distribution for homogeneous solid water and heterogeneous brain phantoms, and primarily focused on the differences arising from the effects of inhomogeneity. The relative dose graphs were displayed for different collimator diameters. The dose values from the maximal interval regions were determined and compar...
Source
#1Si ChenH-Index: 19
#2Kan Lin (NTU: Nanyang Technological University)
Last. Linbo LiuH-Index: 23
view all 3 authors...
Optical coherence tomography angiography (OCTA) has been established as a powerful tool for investigating vascular diseases and is expected to become a standard of care technology. However, its widespread clinical usage is hindered by technical gaps such as limited field of view (FOV), lack of quantitative flow information, and suboptimal motion correction. Here we report a new imaging platform, termed spectrally extended line field (SELF) OCTA that provides advanced solutions to the above-menti...
#2Zohreh HosseinaeeH-Index: 6
Last. Parsin Haji Reza (UW: University of Waterloo)H-Index: 8
view all 7 authors...
Histological images are critical in the diagnosis and treatment of cancers. Unfortunately, the current method for capturing these microscopy images require resource intensive tissue preparation that delays diagnosis for many days to a few weeks. To streamline this process, clinicians are limited to assessing small macroscopically representative subsets of tissues. Here, we present a combined photoacoustic remote sensing (PARS) microscope and swept source optical coherence tomography (SS-OCT) sys...
#1Mikhail N. ShneiderH-Index: 41
#2Mikhail PekkerH-Index: 21
In this paper, a simple theoretical model of excitation of action potentials of multiple motor pools by stimulating current pulses over the lumbosacral regions of the spinal cord is presented. The present model is consistent with known experimental data.
Last. Peng Miao (SJTU: Shanghai Jiao Tong University)H-Index: 12
view all 4 authors...
Random matrix theory provides new insights into multiple scattering in random media. In a recent study, we demonstrated the statistical separation of single- and multiple-scattering components based on a Wishart random matrix. The first- and second-order moments were estimated through a Wishart random matrix constructed using dynamically-backscattered speckle images. In this study, this new strategy was applied to laser speckle contrast imaging (LSCI) of in-vivo blood flow. The random matrix-bas...
#1Maëlle Vilbert (École Polytechnique)
#2Romain BocheuxH-Index: 2
Last. Karsten PlamannH-Index: 17
view all 7 authors...
PURPOSE: To develop an automated algorithm allowing extraction of quantitative corneal transparency parameters from clinical spectral-domain OCT images. To establish a representative dataset of normative transparency values from healthy corneas. METHODS: SD-OCT images of 83 normal corneas (ages 22-50 years) from a standard clinical device (RTVue-XR Avanti, Optovue Inc.) were processed. A pre-processing procedure is applied first, including a derivative approach and a PCA-based correction mask, t...
#1F. Zarrinkhat (UPC: Universitat Politècnica de Catalunya)H-Index: 2
Last. Zachary D. TaylorH-Index: 24
view all 9 authors...
Coupling to longitudinal modes of thin spherical shells, under Gaussian-beam illumination, was explored with a theoretical method based on Fourier-optics analysis and vector spherical harmonics. The illumination frequency band was fixed between 100-600 GHz and the outer spherical shell radius of curvature and thickness are 7.5 mm and 0.5 mm, respectively. The shell material was either the lossless cornea or an aqueous effective media representing the cornea. Six different beam-target strategies ...
12345678910
Top fields of study
This website uses cookies.
We use cookies to improve your online experience. By continuing to use our website we assume you agree to the placement of these cookies.
To learn more, you can find in our Privacy Policy.