scholarly journals High-resolution Photoacoustic/Ultrasound Imaging of the Porcine Stomach Wall: An Ex Vivo Feasibility Study

2021 ◽  
Author(s):  
Jaewoo Kim ◽  
Joongho Ahn ◽  
Gwansuk Kang ◽  
Jooha Hwang ◽  
Chulhong Kim
Keyword(s):  
High Resolution ◽  
Ultrasound Imaging ◽  
Feasibility Study ◽  
Ex Vivo ◽  
Stomach Wall

QUANTITATIVE ASSESSMENT OF GINGIVAL INFLAMMATION USING HIGH-RESOLUTION ULTRASOUNDEX-VIVO

2018 ◽  
Vol 18 (03) ◽  
pp. 1850012 ◽  
Author(s):  
AHMED M. SAYED ◽  
RACHEL LAMARCK ◽  
ELISA CRUZ ◽  
EROS CHAVES ◽  
OSAMA M. MUKDADI
Keyword(s):  
High Resolution ◽  
Ultrasound Imaging ◽  
Ex Vivo ◽  
Ultrasound Image ◽  
Strong Relationship ◽  
Ultrasound Images ◽  
Gingival Inflammation ◽  
Cross Sectional ◽  
Diagnostic Potential ◽  
Image Pairs

This study investigates the feasibility of using high-resolution ultrasound imaging echogenicity to quantitatively diagnose gingival inflammation. Gingival samples were extracted from the study participants during gingivectomy procedures. Ultrasound mechanical scanning of the samples was immediately conducted ex-vivo to render cross-sectional images of high resolution, at different locations. Samples’ histological preparation and analysis was followed after performing ultrasound imaging. Histological sections were then matched with ultrasound images at different sections for each gingival sample. The matched image pairs were used to estimate two quantitative measures; relative inflammation area and ultrasound image echogenicity. These parameters were employed to judge the diagnostic potential of gingival ultrasound imaging. The results show that ultrasound images exhibited low intensity levels at the inflamed gingival regions, while healthy layers showed higher intensity levels. The relative area parameter implied a strong relationship between ultrasound and histological images. Ultrasound echogenicity was found to be statistically significant in differentiating between some inflammation degrees in the studied gingival samples. In summary, ultrasound imaging has the potential to be a noninvasive adjunct diagnostic tool for gingival inflammation, and may help assess the stage of the disease and ultimately limit periodontal disease occurrence; taking into consideration the limits of this study.

scholarly journals High-resolution ex vivo magnetic resonance angiography: a feasibility study on biological and medical tissues

2010 ◽  
Vol 10 (1) ◽  
pp. 3 ◽  
Author(s):  
Anne S Rasmussen ◽  
Henrik Lauridsen ◽  
Christoffer Laustsen ◽  
Bjarke G Jensen ◽  
Steen F Pedersen ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
High Resolution ◽  
Magnetic Resonance Angiography ◽  
Feasibility Study ◽  
Ex Vivo

High Resolution Ultrasound Imaging Using Frequency Domain Interferometry

2012 ◽  
Vol 132 (10) ◽  
pp. 1552-1557 ◽  
Author(s):  
Hirofumi Taki ◽  
Takuya Sakamoto ◽  
Makoto Yamakawa ◽  
Tsuyoshi Shiina ◽  
Toru Sato
Keyword(s):  
High Resolution ◽  
Frequency Domain ◽  
Ultrasound Imaging

scholarly journals A Tumbling Magnetic Microrobot System for Biomedical Applications

Micromachines ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 861
Author(s):  
Elizabeth E. Niedert ◽  
Chenghao Bi ◽  
Georges Adam ◽  
Elly Lambert ◽  
Luis Solorio ◽  
...  
Keyword(s):  
Ultrasound Imaging ◽  
Biomedical Applications ◽  
Imaging System ◽  
Ex Vivo ◽  
Negative Control ◽  
Circular Path ◽  
Rotational Axis ◽  
Significant Difference

A microrobot system comprising an untethered tumbling magnetic microrobot, a two-degree-of-freedom rotating permanent magnet, and an ultrasound imaging system has been developed for in vitro and in vivo biomedical applications. The microrobot tumbles end-over-end in a net forward motion due to applied magnetic torque from the rotating magnet. By turning the rotational axis of the magnet, two-dimensional directional control is possible and the microrobot was steered along various trajectories, including a circular path and P-shaped path. The microrobot is capable of moving over the unstructured terrain within a murine colon in in vitro, in situ, and in vivo conditions, as well as a porcine colon in ex vivo conditions. High-frequency ultrasound imaging allows for real-time determination of the microrobot’s position while it is optically occluded by animal tissue. When coated with a fluorescein payload, the microrobot was shown to release the majority of the payload over a 1-h time period in phosphate-buffered saline. Cytotoxicity tests demonstrated that the microrobot’s constituent materials, SU-8 and polydimethylsiloxane (PDMS), did not show a statistically significant difference in toxicity to murine fibroblasts from the negative control, even when the materials were doped with magnetic neodymium microparticles. The microrobot system’s capabilities make it promising for targeted drug delivery and other in vivo biomedical applications.

Endoscopic slipknot clip suturing method: an ex vivo feasibility study (with video)

2016 ◽  
Vol 83 (2) ◽  
pp. 447-450 ◽  
Author(s):  
Toshihiro Nishizawa ◽  
Toshio Uraoka ◽  
Seiji Sagara ◽  
Hidekazu Suzuki ◽  
Teppei Akimoto ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Ex Vivo

scholarly journals High resolution isotropic diffusion imaging in post-mortem neonates: a feasibility study

2018 ◽  
Vol 91 (1092) ◽  
pp. 20180319 ◽  
Author(s):  
Amy R McDowell ◽  
Susan C Shelmerdine ◽  
David W Carmichael ◽  
Owen J Arthurs
Keyword(s):  
High Resolution ◽  
Feasibility Study ◽  
Diffusion Imaging ◽  
Post Mortem ◽  
Isotropic Diffusion
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