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Ultrasound imaging has been widely used to visualize internal body structure. In clinical practices, physicians employ ultrasound imaging to assist the diagnosis of various diseases. However, different parameter settings in sonography system may cause discrepancies in the ultrasound images. Hence, this paper proposed a GA-based method for selecting universal features under different parameter settings...
In recent years, ultrasound imaging was widely used in the diagnosis of lymph nodes. Most lymph nodes tend to have various internal echogenicities in the sonogram, which makes a definite diagnosis difficult. To overcome this problem, we propose a new image feature selection method based on ant colony optimization (ACO) for different imaging systems. The selected significant features are then applied...
To detect early prostate cancer, physicians usually apply the color Doppler ultrasound imaging to visualize prostate. Since color Doppler ultrasound imaging provides blood flow information, differentiating the malignancy from benign prostate diseases by inspecting Doppler spectrum is not difficult. However, it is hand-held, time-consuming, and only limited in a small and static region, which might...
Ultrasound (US) imaging is more popular as a diagnostic tool than magnetic resonance imaging (MRI) and computerized tomography (CT) because it is inexpensive and easy to use. Most lymph nodes (LN) tend to have various internal echogenicities in the sonogram, which makes a definite diagnosis difficult. If the characteristic echogenicities for the major components of the lymph node can be identified,...
The echogenicity of whole blood is known to vary during the flow cycle under pulsatile flow both in vitro and in vivo. However, the fundamental underlying mechanisms remain uncertain. The cyclic variations of high frequency ultrasonic backscattering signals have been measured for explaining the temporal variations of red blood cells (RBCs) aggregation under pulsatile flow. The level of RBC aggregation...
Physicians usually diagnose the pathology of the thyroid gland by its volume. However, even if the thyroid glands are found and the shapes are hand-marked from ultrasound (US) images, most physicians still depend on computed tomography (CT) images, which are expensive to obtain, for precise measurements of the volume of the thyroid gland. This approach relies heavily on the experience of the physicians...
Hyperthyroidism is a common thyroid disease. Graves' disease is the most common etiology with 70-80% of hyperthyroidism. Conventionally, a diagnosis requires weeks to confirm with blood tests. In this paper, we proposed a novel approach to diagnose Gravespsila disease in ultrasound images directly. We segment the thyroid regions, and utilize a high performance classifier to recognize the regions....
Prostate hyperplasia is usually found affecting male adults in developed countries. Transrectal ultrasoundgraphy (TRUS) imaging is widely used to diagnose prostate disease. Ultrasonic images are often argued with their primitive echo perturbations and speckle noise, which may confuse the physicians in inspection. Therefore, in this paper, we propose an automatic prostate segmentation system in TRUS...
Most of the thyroid nodules are heterogeneous with various internal components, which confuse many radiologists and physicians with their various echo patterns in thyroid nodules. A lot of texture extraction methods were used to characterize the thyroid nodules. Accordingly, the thyroid nodules could be classified by the corresponding textural features. In this paper, five support vector machines...
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