Sökning: "ultrasound optical tomography"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden ultrasound optical tomography.

1. 1. Material and technique development for ultrasound optical tomography using spectral hole burning filters

   Författare :Alexander Bengtsson; NanoLund: Centre for Nanoscience; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biomedical imaging; ultrasound optical tomography; acousto-optical tomography; rare-earth-ion doped crystals; spectral holeburning; slow light filters; Tm 3:LaF3; Fysicumarkivet A:2022:Bengtsson;

   Sammanfattning : The molecular sensitivity provided by optical photons has potential advantages in medical diagnostics, for example, in distinguishing healthy from cancerous tissue. However, scattering resulting from inhomogeneities in the refractive index of tissues prevents spatially resolved optical measurements in biological material, except at very shallow depths. LÄS MER

3. 2. Development of Models, Methods, and Materiel for Deep Tissue Imaging using Light, Ultrasound, and Spectral-Hole Burning

   Författare :David Hill; NanoLund: Centre for Nanoscience; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; biomedical imaging; ultrasound optical tomography; ultrasound-modulated optical tomography; acousto-optical tomography; Monte Carlo light transport; spectral-hole-burning filters; rare-earth-ion doped crystals; stoichiometric lithium niobate;

   Sammanfattning : The medical imaging technique called “ultrasound optical tomography” (UOT) entails light scattered in tissue that is given spatial information by interacting with an ultrasound field, thus allowing for molecular information to be imaged with ultrasonic resolution. This thesis discusses how UOT can be implemented, with most attention put toward the implementation using spectral-hole-burning filters (SHF) in rare-earth-ion-doped crystals. LÄS MER

4. 3. Optical Coherence Tomography for Dermatological Applications

   Författare :Jakob Borup Thomsen; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; medical imaging; skin cancer diagnostics; optical imaging; blood flow; treatment monitoring;

   Sammanfattning : Optical coherence tomography (OCT) is a non-invasive optical imaging technique providing approximately 10 micrometer resolution of tissue in vivo. Within ophthalmology, OCT has already proven its value and is routinely used for diagnosing retinal diseases. LÄS MER

5. 4. Optimizing Percutaneous Coronary Intervention

   Författare :Sofia Bergman; Kardiologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Percutaneous Coronary Intervention; intravascular imaging; Intravascular ultrasound; Optical coherence tomography; near infrared spectroscopy; Intraprocedural stent thrombosis;

   Sammanfattning : .... LÄS MER

7. 5. Spindle vibration and sound field measurement using optical vibrometry

   Författare :Kourosh Tatar; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

   Sammanfattning : Mechanical systems often produce a considerable amount of vibration and noise. To be able to obtain a complete picture of the dynamic behaviour of these systems, vibration and sound measurements are of significant importance. Optical metrology is well-suited for non-intrusive measurements on complex objects. LÄS MER