Disputas: Thu Thuy Nguyen - Universitetet I Sørøst-Norge
Có thể bạn quan tâm
Mine studier
- Beklager, her gikk noe galt. Vi har problemer med favorittmarkeringer for øyeblikket.
- Du har ikke markert noen studier som dine favoritter. Du kan gjøre det ved å klikke på hjertesymbolet når du finner et studium som interesserer deg.
- clear
- en
- no
- Forskning
- Doktorgradsutdanning
- Disputaser
- 2020
- Disputas: Thu Thuy Nguyen
Thu Thuy Nguyen ved campus Vestfold holder prøveforelesning og disputas for graden philosophiae doctor (ph.d.) 15. mai.
15 MayPraktisk informasjon
- Dato: 15 mai 2020
- kl. 10.15 - 17.15
- Vestfold, digitalt via Zoom
- Last ned kalenderfil
- Første opponent: Profesor Jørgen A. Jensen, DTU, Lyngby, Danmark.
- Andre opponent: Professor Tomas Jansson, Lunds Universitet, Sverige.
- Administrator: Professor Erik A. Johannessen, USN.
- Hovedveileder: Professor Lars Hoff, USN.
- Medveileder: Ph.d. Espen W. Remme, Oslo universitetssykehus.
Følg disputasen live her (Lenken blir aktiv når programmet starter)
Bedømmelseskomité
Veiledere
Thu Thuy Nguyen har til forsvar for graden philosophiae doctor (ph.d.) i programmet anvendte mikro- og nanosystemer, Fakultet for teknologi, naturvitenskap og maritime fag, innlevert avhandling med tittelen «Layer-specific strain and strain rate: Estimation using miniature transducers attached to the epicardium».
På grunn av koronasituasjonen gjennomføres prøveforelesning og disputas fredag 15. mai digitalt via Zoom (trykk på lenken som blir aktiv når programmet starter).
Tema for prøveforelesning er «Velocity estimation in ultrasound imaging».
Prøveforelesning starter klokken 1015 og disputas klokken 1315.
Les hele avhandlingen her (trykk på lenka)
Om avhandlingen
Throughout the world, approximately 1 million patients undergo cardiac surgery every year, making it a well-established and common procedure in hospitals. The procedure is regarded safe, but complications may occur, and reliable methods to assess ventricular function during and after cardiac surgery are essential to ensure the best possible prognosis for the patient. The target of this project was to develop small and dedicated systems to continuously monitor cardiac function during surgery, and in the future, also during the first days following the operation. The system used two miniature ultrasound transducers attached directly to the heart surface during surgery.
In her PhD, Thu Thuy Nguyen developed new software algorithms to calculate the motion of the heart muscle, using data from the ultrasound transducers. Radiofrequency scanlines from the transducers were recorded and used to calculate velocity and strain inside the heart muscle, and to track the motion of the layers inside the heart. The starting point was two standard velocity estimation methods, time delay estimation and phase shift Doppler, and these standard methods were modified to adapt them to the measurement situation. Nguyen developed a computer simulation model for the heart to test her methods on a model where the true motion is known, and she tested her methods on ultrasound data acquired from animal trials.
The results showed that the tested estimators could give robust data in most situations, but there were variations in quality and processing time. Two phenomena in cardiac mechanics were investigated as examples of clinical information that can be obtained from this system: Transmural strain profiles as function of myocardial depth at different sites in the left ventricle, and effect of myocardial perfusion on the end-systolic radial strain.
The main result of Nguyen’s research is the development of an ultrasound measurement system with signal processing methods to monitor myocardial motion in detail, in particular regional myocardial deformation. Several velocity estimation methods were tested and compared. The choice of which one to use in a specific application will be a trade-off between accuracy, robustness, required computational power, and computation time, the latter being particularly important when real-time processing is required.
15 MayPraktisk informasjon
- Dato: 15 mai 2020
- kl. 10.15 - 17.15
- Vestfold, digitalt via Zoom
- Last ned kalenderfil
- Første opponent: Profesor Jørgen A. Jensen, DTU, Lyngby, Danmark.
- Andre opponent: Professor Tomas Jansson, Lunds Universitet, Sverige.
- Administrator: Professor Erik A. Johannessen, USN.
- Hovedveileder: Professor Lars Hoff, USN.
- Medveileder: Ph.d. Espen W. Remme, Oslo universitetssykehus.
Følg disputasen live her (Lenken blir aktiv når programmet starter)
Bedømmelseskomité
Veiledere
Từ khóa » Dr Thu Thuy Nguyen
-
Thi Thu Thuy NGUYEN - Postdoc - National Cancer Institute (NCI)
-
Thu Thuy Nguyen - Dr - Hospital CR | LinkedIn
-
Dr. Thuthuy Nguyen, MD - Internal Medicine Specialist In Euless, TX
-
Dr. Thu-Thuy Nguyen, DDS - Write A Review - Houston, TX
-
Dr. Thu-Thuy Nguyen, DDS, Dentistry Practitioner - Houston, TX
-
Dr. Thu Thuy
-
Dr Thuy Nguyen - RMIT University
-
Dr. Thu Thuy Nguyen . Westminster CA - WebMD Physician Directory
-
NGUYEN THU THUY, DR. - TX Entrepreneur Partners
-
Dr. Thuthuy T. Nguyen, MD | Euless, TX | Internist | US News Doctors
-
Dr. Thuthuy Thi Nguyen, MD - Euless, TX
-
Thuy Nguyen Thu (0000-0002-7981-4394) - ORCID
-
Mrs Thuy Nguyen - The University Of Sydney