Essays about: "Poly vinyl alcohol"

Showing result 1 - 5 of 13 essays containing the words Poly vinyl alcohol.

  1. 1. Implementation of Super-Resolution Ultrasound Imaging for in Vitro Experiments

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Kani Yara; [2022]
    Keywords : B-mode; Localization; Microbubbles; Poly-Vinyl-Alcohol; Tracking; Verasonics; B-mode; Localisering; Mikrobubblor; Poly-Vinyl-Alcohol; Spårning; Verasonics;

    Abstract : Ultrasound imaging systems are a safe and affordable imaging modality with the disadvantage of low spatial resolution, especially for assessing smaller vessels. However, with the implementation of super-resolution ultrasound imaging techniques, studies have shown promising results in achieving a resolution below the diffraction limit. READ MORE

  3. 2. An Ion-Selective Electrode for Detection of Ammonium in Wastewater Treatment Plants

    University essay from KTH/Kemi

    Author : Josephine Berg; [2021]
    Keywords : jonselektiv elektrod; membran; ammonium; sensor; reningsverk; ion-selective electrode ISE ; membrane; ammonium; sensor; wastewater treatment plant WWTP ;

    Abstract : Att följa ammonium i reningsverk är avgörande för att förbättra reningsprocessen och kontrollera flödet av föroreningar ut till ekosystemet. Jonselektiva elektroder (ion-selective electrodes, ISEs) är en lovande teknik inom området, där polymermembran baserade på nonactin är de mest studerade membranen för ammoniumsensorer. READ MORE

  4. 3. Development of a Tool for Imaging the Pumping-Out Behavior of Poly- Vinyl Alcohol Shelled Microbubbles

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Stina Hägglund; [2020]
    Keywords : Microbubbles; Pumping-out behavior; Verasonics; Ultrasound; Ultrafast imaging;

    Abstract : For many years, microbubbles have been used as ultrasound contrast agents to improve the quality of diagnostics, seeing that they produce more backscattering ultrasound than blood does. Novel types of microbubbles and increased knowledge about their different behaviors have led to other suggested areas of use. READ MORE

  5. 4. Image Contrast Enhancement using Poly Vinyl Alcohol Microbubble Response to High MI Ultrasound

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Mohammed R. A. Rashid; [2018]
    Keywords : high MI ultrasound; microbubble; PVA; mechanical index; Verasonics; contrast enhancment;

    Abstract : The induced rupturing of Poly Vinyl Alcohol (PVA) microbubbles with high mechanical index (MI)ultrasound beam is used in multiple medical application such as drug delivery, image contrastenhancement and perfusion imaging.In this work, Triggered imaging technique with subtraction algorithm is used to enhance themicrobubble’s (MB) contrast over tissue (CTR). READ MORE

  6. 5. Subharmonic Imaging of Polymer-Shelled Contrast Agents

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Rúnar Sigmundsson; [2018]
    Keywords : Ultrasound Imaging; Contrast Enhanced Ultrasound Imaging; Contrast Agents; PVA Contrast Agents;

    Abstract : The harmonic generation due to the nonlinear behavior of Ultrasound Contrast Agents (UCAs) must be exploited for improved efficiency when imaging vascular targets in the neighborhood of highly echogenic tissue. One may even further improve the efficiency by focusing on the subharmonic generation of the UCAs, which is an even more exclusive property than the generation of higher harmonics, for improved Contrast-to-Tissue ratio (CTR). READ MORE