It leads to a Master of Science M.
Master thesis and projects — Ultrasound technology The department of circulation and medical imaging offers projects and master thesis topics for technology students of most of the different technical study programs at NTNU. There is an own page for the supplementary specialization courses.
List of topics Topics for thesis and projects are given below. Most of the topics can be adjusted to the students qualifications and wishes. Don't hesitate to take contact with the corresponding supervisor - we're looking forward to a discussion with you!
Blood flow imaging projects Ultrasound blood flow imaging - a bit of background: One of the strengths of ultrasound imaging is its ability to measure blood and tissue velocities with high precision and at a high frame rate. Information of blood velocities can in the diagnostic setting be used to identify abnormal blood flow related to pathology, such as the jet flow pattern resulting from a heart valve leakage.
Further, information about tissue velocities can be used to quantify the function of the heart, through the identification of areas of the heart muscle with reduced contractibility.
You can read more about Tissue Velocity Imaging here.
Traditional velocity measurements with ultrasound are based on the Doppler principle, which states that sound emitted from a moving source or sound reflected from a moving target will lead to a shift in the frequency of the sound.
This so-called Doppler shift can be measured directly from the received signal through a continuous wave ultrasound emission CW-Doppleror sampled through the emission of several ultrasound pulses PW-Doppler.
Today, Doppler ultrasound measurement is an integral part of commercial scanner systems. Conventional blood flow imaging modalities include spectral Doppler, in which the complete spectrum of velocities within one specific region is displayed. Another modality estimates the mean velocity and direction of blood in many points in a distributed region, which is encoded as a parametric color image, displayed overlaid an image of the anatomy.
This latter color flow imaging CFI modality has proven very useful for the detection of areas of abnormal blood flow, which can be investigated further using spectral Doppler techniques. Some blood flow related student assignments 1. Model-based estimation of complex blood flow in congenital heart disease fetus, neonates and children Cardiac flow patterns may reveal several kinds of cardiovascular disease.
Well known examples include the detection and quantification of leaky heart valves and poor systolic and diastolic function. Conventional flow imaging with ultrasound is however limited to only measuring the velocity component along the ultrasound beam, i. This discrepancy limits the usefulness of Doppler ultrasound in diagnostic settings.
In this work we will focus on further developing multi-dimensional flow velocity estimators based on speckle tracking, i. The main clinical application will be pediatric cardiology, with the aim to improve the depiction of complex flow patterns such as vortex and shunt flow.
The proposed multidimensional approaches proposed are however not as robust as conventional methods.
Thus, the aims of this student project will be to further develop and optimize tracking algorithms within a robust framework based on the predicted motion of flow using a Kalman filter model-based estimation.
This will be used in many different medical applications such as vascular imaging and pediatric and adult cardiology. One relevant velocity estimator is the blood speckle tracking estimator which relies on an initial fast block matching procedure, and a refined subsample displacement estimator step.
We would like to know more about this estimator and we want to make it more robust. We are looking for a candidate to 1 Evaluate the statistical properties of the current simple algorithms for speckle tracking, and to develop new and more robust speckle tracking algorithms based for instance on robust least squares estimator principles for the initial block matching, and optical flow principles for the subsequent subsample estimation.
Also important, we need to provide an uncertainty map to be able to mask out the more uncertain measurements.
Bedside computational fluid dynamics based on ultrasound imaging There is increasing interest in using advanced computational models for blood flow based on computational fluid dynamics CFD.
By utilizing state-of-the-art GPU's it is possible to significantly speed up computations. Further, by accelerating recent mesh-less methods based on Smoothed Particle Hydrodynamics SPH and Lattice-Boltzmann approaches, one can more easily couple ultrasound measurements and simulations in an easier way.“The scholarship will allow me to focus on my growth as a clinician and emerging researcher as I participate in full-time clinical externships and complete my master’s thesis.”Jacob’s research focus is on a multiple speech subsystem analysis approach to predicting age-related speech intelligibility decline in older adults.
Bings Masters Thesis Scholarship for those undertaking the thesis year of a Masters programme at a university in New Zealand. Bings Scholarship for International Students in New Zealand, The scholarship supports postgraduate students at Master’s level to carry out research in the fields of medicine, veterinary science.
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