Abstract
Assessing cardiac function with trans-thoracic ultrasound
is a challenging task, mainly due to its fast motion and its
anatomical position which only allows for a narrow intercostal imaging window. These factors often lead to the use of diverging waves, even when contrast agents are employed. While capable of achieving a very high frames rate, an acquisition with diverging waves from a narrow aperture suffers from serious image quality degradation. In this regard, it is often impossible to mitigate this problem using common processing methods, such as coherent compounding.
In this study, we cast the problem of reconstructing the
contrast enhanced ultrasound images as regularised inverse
problem, analogous to the compressed sensing one, where the
sensing matrix is fundamentally described by the delay operator associated with the time of flight. The results show that this framework can improve the Signal to Noise Ratio (SNR) of the image by up to 5.85dB compared to delay and sum (DAS) and is therefore a promising way to reconstruct contrast enhanced cardiac images. The experiments also highlight that the way noise is modelled has a significant impact on the final image quality
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| Original language | English |
|---|---|
| Publication status | Published - 6 Oct 2019 |
| Event | IEEE International Ultrasonics Symposium 2019 - Glasgow, United Kingdom Duration: 6 Oct 2019 → 9 Oct 2019 https://attend.ieee.org/ius-2019/ |
Conference
| Conference | IEEE International Ultrasonics Symposium 2019 |
|---|---|
| Country/Territory | United Kingdom |
| City | Glasgow |
| Period | 6/10/19 → 9/10/19 |
| Other | The 2019 IEEE International Ultrasonics Symposium will take place from October 6th to 9th in Glasgow, Scotland. Through the work of Professor Ian Donald and his colleagues at the University of Glasgow, this historic city has a rightful claim to be a birth place of medical ultrasound imaging, with the first paper on its use in obstetrics published in the Lancet in 1958. Some of Professor Donald’s equipment can be seen in the University’s Hunterian Museum and IEEE IUS 2019 will be held a 20-minute walk away at the Scottish Event Campus (SEC), including the well-named Armadillo, on the north bank of the River Clyde. The SEC is only 15 minutes on foot from Glasgow city centre and is well-served by public transport, including its own railway station stop, with many hotels and other facilities on the same campus and Glasgow Science Centre, the UK’s largest, just across the river. Glasgow is a highly appropriate host for IEEE IUS 2019 and abstracts are now sought, describing original research in the field of ultrasonics and closely related topics, for presentation in oral or poster format. We believe IEEE IUS 2019 will be as lively and exciting as any recent symposia and look forward to welcoming you here! |
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