A Multiscale Attentional Unet Model for Automatic Segmentation in Medical Ultrasound Images
In this study, two representative types of ultrasound images, one of the thyroid nodules and the other of the brachial plexus nerves, were used to assess the effectiveness of the proposed approach. The best segmentation results from MSAC-Unet were achieved on two thyroid nodule datasets (TND-PUH3 and DDTI) and a brachial plexus nerve dataset (NSD) with Dice coefficients of 0.822, 0.792, and 0.746, respectively. The analysis of segmentation results shows that our MSAC-Unet greatly improves the segmentation accuracy with more reliable ROI edges and boundaries, decreasing the number of erroneously segmented ROIs in ultrasound...
Source: Ultrasonic Imaging - April 28, 2023 Category: Radiology Authors: Rui Wang Haoyuan Zhou Peng Fu Hui Shen Yang Bai Source Type: research
A Geometric Model of Ultrasound Backscatter to Describe Microstructural Anisotropy of Tissue
Ultrason Imaging. 2023 Apr 27:1617346231171147. doi: 10.1177/01617346231171147. Online ahead of print.ABSTRACTMethods to assess ultrasound backscatter anisotropy from clinical array transducers have recently been developed. However, they do not provide information about the anisotropy of microstructural features of the specimens. This work develops a simple geometric model, referred to as the secant model, of backscatter coefficient anisotropy. Specifically, we evaluate anisotropy of the frequency dependence of the backscatter coefficient parameterized in terms of effective scatterer size. We assess the model in phantoms w...
Source: Ultrasonic Imaging - April 27, 2023 Category: Radiology Authors: Andrew P Santoso Ivan Rosado-Mendez Quinton W Guerrero Timothy J Hall Source Type: research
Ultrasound Patterns and Disease Progression in Medullary Sponge Kidney in Adults
Ultrason Imaging. 2023 May;45(3):151-155. doi: 10.1177/01617346231165493. Epub 2023 Apr 14.ABSTRACTOur paper presents the ultrasound (US) patterns of a rare kidney disease-medullary sponge kidney (MSK)-that have not been described before in comparison with other causes of medullary hyperechogenicity and correlates them with the severity of the disease and prognosis. This is a clinical observational study of all US examinations in the Nephrology Department over a period of 6 years. The abdominal US focused on the kidneys was recorded. US characteristics of the medulla and cortex were analyzed. We found 10 patients with char...
Source: Ultrasonic Imaging - April 14, 2023 Category: Radiology Authors: Mirela Liana Gliga Cristian Chirila Paula Maria Chirila Source Type: research
