kth.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Utveckling av miniatyrtransducer för ultraljudsbaserade mätningar
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH).
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH).
2022 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Development of a Miniature Transducer for Ultrasound Based Measurements (English)
Abstract [sv]

En ultraljudstransducer är ett välkänt instrument inom medicintekniska industrin. Det finns flera olika typer av transducers med varierande egenskaper. Ett gemensamt mål med dessa transducers är diagnostisering, behandling samt uppföljning av behandlingen. Projektet gick ut på att utforska gränserna för hur små en transducer kan skapas samt hur dessa presterar. Dessutom är projektet en fortsättning på ett tidigare exjobb som utfördes våren 2021. Syftet är att expandera på förra arbetets omfång där det lämnade samt att förbättra de befintliga resultaten. Transducern i fråga har en simpel modell med ett hölje, piezoelektrik kristall, backing layer samt matching layer. I rapporten ingår konstruktionsprocessen och testning av den konstruerade transducern samt analysering av påverkan av olika backing layers med varierande järnpulver/lim-förhållanden. Resultatet visar att det är fullt möjligt att producera en miniatyr transducer med syfte att kunna sända ut signaler samt registrera reflekterande ekon. Det som huvudsakligen begränsar storleken på transducern är brist på alternativ av verktyg och instrument för hantering av beståndsdelar i minimal storlek med hög precision. Resultatet visar även att backing layer med högre koncentration av järnpulver gav reducerade pulser i olika grader för samtliga signaler.

Abstract [en]

An ultrasound transducer is a well-known device within the medical industry. There are numerous types of transducers with varying traits. One common goal with transducers is diagnosing, treatment as well as monitoring of said treatment. The purpose of the project was to explore the boundaries for how small a transducer can be manufactured as well as how it performs. The transducer in question has a case containing a piezoelectric crystal, as well as a backing layer and a matching layer. Furthermore, this project is a continuation of a previous job done in spring of 2021. The purpose is to expand where the last project left off as well as improving the existent results. The report includes processes regarding construction and tests of the constructed transducer in question as well as analysis of the effect of different backing layers with varying iron powder/glue-relationships. The result demonstrates high possibility to producea miniature transducer with the purpose of emitting signals as well as registering returning echoes. The main limiting factor of the transducers size is the lack of options for tools and instruments for handling components with minimal size using high precision. The results further show that backing layers containing higher concentration of iron powder gave reduced pulses to different extents for all signals.

Place, publisher, year, edition, pages
2022. , p. 36
Series
TRITA-CBH-GRU ; 2022:285
Keywords [sv]
ultraljud, transducer, piezoelektrisk kristall, backing layer, matching layer
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:kth:diva-320398OAI: oai:DiVA.org:kth-320398DiVA, id: diva2:1705117
Subject / course
Medical Engineering
Educational program
Master of Science in Engineering - Medical Engineering
Supervisors
Examiners
Available from: 2022-10-21 Created: 2022-10-20 Last updated: 2022-10-21Bibliographically approved

Open Access in DiVA

fulltext(7643 kB)192 downloads
File information
File name FULLTEXT01.pdfFile size 7643 kBChecksum SHA-512
79727d1d86910fd097f4597f3a1e4fd9d526d1a6b9f7080e4afb30363200f81be600721cd705440de813ccc865bfb489981e02ee6856e75657bcf8bced4a5423
Type fulltextMimetype application/pdf

By organisation
School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH)
Medical and Health Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 195 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 248 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf