scholarly journals The Dynamics of Embolism Repair in Xylem: In Vivo Visualizations Using High-Resolution Computed Tomography

2010 ◽  
Vol 154 (3) ◽  
pp. 1088-1095 ◽  
Author(s):  
Craig R. Brodersen ◽  
Andrew J. McElrone ◽  
Brendan Choat ◽  
Mark A. Matthews ◽  
Kenneth A. Shackel
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
High Resolution Computed Tomography

scholarly journals Noninvasive quantification of heterogeneous lung growth following extensive lung resection by high-resolution computed tomography

2009 ◽  
Vol 107 (5) ◽  
pp. 1569-1578 ◽  
Author(s):  
Cuneyt Yilmaz ◽  
Priya Ravikumar ◽  
D. Merrill Dane ◽  
Dennis J. Bellotto ◽  
Robert L. Johnson ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Connective Tissue ◽  
Coefficient Of Variation ◽  
Lung Resection ◽  
Lung Growth ◽  
High Resolution Computed Tomography ◽  
Extensive Resection ◽  
Compensatory Lung Growth

To quantify the in vivo magnitude and distribution of regional compensatory lung growth following extensive lung resection, we performed high-resolution computed tomography at 15- and 30-cmH2O transpulmonary pressures and measured air and tissue (including microvascular blood) volumes within and among lobes in six adult male foxhounds, before and after balanced 65% lung resection (∼32% removed from each side). Each lobe was identified from lobar fissures. Intralobar gradients in air and tissue volumes were expressed along standardized x, y, z-coordinate axes. Fractional tissue volume (FTV) was calculated as the volume ratio of tissue/(tissue + air). Following resection compared with before, lobar air and tissue volumes increased 1.8- to 3.5-fold, and whole lung air and tissue volumes were 67 and 90% of normal, respectively. Lobar-specific compliance doubled post-resection, and whole lung-specific compliance normalized. These results are consistent with vigorous compensatory growth in all remaining lobes. Compared with pre-resection, post-resection interlobar heterogeneity of FTV, assessed from the coefficient of variation, decreased at submaximal inflation, but was unchanged at maximal inflation. The coefficient of variation of intralobar FTV gradients changed variably due to the patchy development of thickened pleura and alveolar septa, with elevated alveolar septal density and connective tissue content in posterior-caudal and peripheral regions of the remaining lobes; these areas likely experienced disproportional mechanical stress. We conclude that HRCT can noninvasively and quantitatively assess the magnitude and spatial distribution of compensatory lung growth. Following extensive resection, heterogeneous regional mechanical lung strain may exceed the level that could be sustained solely by existing connective tissue elements.

Resolution, sensitivity, and in vivo application of high-resolution computed tomography for titanium-coated polymethyl methacrylate (PMMA) dental implants

2013 ◽  
Vol 25 (3) ◽  
pp. 359-365 ◽  
Author(s):  
Vincent M. J. I. Cuijpers ◽  
Jacub Jaroszewicz ◽  
Sukumaran Anil ◽  
Abdullah Al Farraj Aldosari ◽  
X. Frank Walboomers ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Dental Implants ◽  
Polymethyl Methacrylate ◽  
High Resolution Computed Tomography

Three-dimensional reconstruction based on images from spiral high-resolution computed tomography of the temporal bone: anatomy and clinical application

2005 ◽  
Vol 119 (9) ◽  
pp. 693-698 ◽  
Author(s):  
Beom-Cho Jun ◽  
Sun-Wha Song ◽  
Ju-Eun Cho ◽  
Chan-Soon Park ◽  
Dong-Hee Lee ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
3D Reconstruction ◽  
Temporal Bone ◽  
Three Dimensional ◽  
Image Data ◽  
Computer Assisted ◽  
Surface Rendering ◽  
High Resolution Computed Tomography

The aim of this study was to investigate the usefulness of a three-dimensional (3D) reconstruction of computed tomography (CT) images in determining the anatomy and topographic relationship between various important structures. Using 40 ears from 20 patients with various otological diseases, a 3D reconstruction based on the image data from spiral high-resolution CT was performed by segmentation, volume-rendering and surface-rendering algorithms on a personal computer. The 3D display of the middle and inner ear structures was demonstrated in detail. Computer-assisted measurements, many of which could not be easily measured in vivo, of the reconstructed structures provided accurate anatomic details that improved the surgeon’s understanding of spatial relationships. A 3D reconstruction of temporal bone CT might be useful for education and increasing understanding of the anatomical structures of the temporal bone. However, it will be necessary to confirm the correlation between the 3D reconstructed images and histological sections through a validation study.

scholarly journals Ultra-high-resolution computed tomography shows changes in the lungs related with airway hyperresponsiveness in a murine asthma model

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jae-Woo Jung ◽  
Jung Suk Oh ◽  
Boram Bae ◽  
Yoon Hae Ahn ◽  
Lucy Wooyeon Kim ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Structural Changes ◽  
Late Phase ◽  
Lung Parenchyma ◽  
Airflow Limitation ◽  
High Resolution Computed Tomography ◽  
Air Trapping ◽  
Asthma Model

AbstractIn vivo presentation of airway hyper-responsiveness (AHR) at the different time points of the allergic reaction is not clearly understood. The purpose of this study was to investigate how AHR manifests in the airway and the lung parenchyma in vivo following exposure to different stimuli and in the early and late phases of asthma after allergen exposure. Ovalbumin (OVA)-induced allergic asthma model was established using 6-week female BALB/c mice. Enhanced pause was measured with a non-invasive method to assess AHR. The dynamic changes of the airway and lung parenchyma were evaluated with ultra-high-resolution computed tomography (128 multi-detector, 1024 × 1024 matrix) for 10 h. While the methacholine challenge showed no grossly visible changes in the proximal airway and lung parenchyma despite provoking AHR, the OVA challenge induced significant immediate changes manifesting as peribronchial ground glass opacities, consolidations, air-trapping, and paradoxical proximal airway dilatations. After resolution of immediate response, multiple episodes of AHRs occurred with paradoxical proximal airway dilatation and peripheral air-trapping in late phase over a prolonged time period in vivo. Understanding of airflow limitation based on the structural changes of asthmatic airway would be helpful to make an appropriate drug delivery strategy for the treatment of asthma.

scholarly journals High-Resolution Computed Tomography of Single Breast Cancer Microcalcifications in Vivo

2011 ◽  
Vol 10 (4) ◽  
pp. 7290.2010.00050 ◽  
Author(s):  
Kazumasa Inoue ◽  
Fangbing Liu ◽  
Jack Hoppin ◽  
Elaine P. Lunsford ◽  
Christian Lackas ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Computed Tomography ◽  
High Resolution ◽  
High Resolution Computed Tomography
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