Medicine and Health Sciences Commons^™

Dual-Display Laparoscopic Laser Speckle Contrast Imaging For Real-Time Surgical Assistance, Jaepyeong Cha, Corey Zheng, Lung Wai Lau

Pediatrics Faculty Publications

Laser speckle contrast imaging (LSCI) utilizes the speckle pattern of a laser to determine the blood flow in tissues. The current approaches for its use in a clinical setting require a camera system with a laser source on a separate optical axis making it unsuitable for minimally invasive surgery (MIS). With blood flow visualization, bowel viability, for example, can be determined. Thus, LSCI can be a valuable tool in gastrointestinal surgery. In this work, we develop the first-of-its-kind dual-display laparoscopic vision system integrating LSCI with a commercially available 10mm rigid laparoscope where the laser has the same optical axis as …

Evaluation Of Pm Emissions Of A Diesel Engine Fueled With Waste Cooking Oil Biodiesel: A Systematic Review, Omobolanle H. Oshinusi, George M. Gray

GW Research Days 2016 - 2020

Background: The Navigation Guide developed by Johnson et al was used to conduct a robust systematic review of six experimental intervention studies looking at particulate matter (PM)emissions from conventional petroleum diesel and a biodiesel alternative utilizing waste cooking oil in heavy-duty petroleum diesel engines. Waste cooking oil biodiesel is thought to be a more sustainably sourced alternative to its fossil fuel counterpart.

Objectives: Application of the Navigation Guide systematic review methodology to answer the question: Does the replacement of petroleum diesel with waste cooking oil biodiesel reduce hazardous PMemissions? Methods: The study question was specified, evidence was selected and the …

Optimization Of Wavelength Selection For Multispectral Image Acquisition: A Case Study Of Atrial Ablation Lesions, Huda Asfour, S. Guan, Narine Muselimyan, Luther M. Swift, Murray Loew, Narine Sarvazyan

Pharmacology and Physiology Faculty Publications

In vivo autofluorescence hyperspectral imaging of moving objects can be challenging due to motion artifacts and to the limited amount of acquired photons. To address both limitations, we selectively reduced the number of spectral bands while maintaining accurate target identification. Several downsampling approaches were applied to data obtained from the atrial tissue of adult pigs with sites of radiofrequency ablation lesions. Standard image qualifiers such as the mean square error, the peak signal-to-noise ratio, the structural similarity index map, and an accuracy index of lesion component images were used to quantify the effects of spectral binning, an increased spectral distance …