Ultrasonic Viscoelasticity Imaging of Nonpalpable Breast Tumors
نویسندگان
چکیده
منابع مشابه
Ultrasonic viscoelasticity imaging of nonpalpable breast tumors: preliminary results.
RATIONALE AND OBJECTIVES Improvements in the diagnosis of early breast cancers depend on a physician's ability to obtain the information necessary to distinguish nonpalpable malignant and benign tumors. Viscoelastic features that describe mechanical properties of tissues may help to distinguish these types of lesions. MATERIALS AND METHODS Twenty-one patients with nonpalpable, pathology-confi...
متن کاملUltrasonic measurements of breast viscoelasticity.
In vivo measurements of the viscoelastic properties of breast tissue are described. Ultrasonic echo frames were recorded from volunteers at 5 fps while applying a uniaxial compressive force (1-20 N) within a 1 s ramp time and holding the force constant for up to 200 s. A time series of strain images was formed from the echo data, spatially averaged viscous creep curves were computed, and viscoe...
متن کاملUltrasonic Breast Tumors
Automatically extracting breast tumor boundaries in ultrasound images is a difficult task due to the speckle noise, the low image contrast, the variance in shapes, and the local changes of image intensity. In this paper, an improved edge-based active contour model in a variational level set formulation is proposed for semi-automatically capturing ultrasonic breast tumor boundaries. First, we ap...
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Imaging Viscoelasticity in Hydropolymers and Breast Tissue with Ultrasound
متن کاملSegmentation of ultrasonic breast tumors based on homogeneous patch.
PURPOSE Accurately segmenting breast tumors in ultrasound (US) images is a difficult problem due to their specular nature and appearance of sonographic tumors. The current paper presents a variant of the normalized cut (NCut) algorithm based on homogeneous patches (HP-NCut) for the segmentation of ultrasonic breast tumors. METHODS A novel boundary-detection function is defined by combining te...
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ژورنال
عنوان ژورنال: Academic Radiology
سال: 2008
ISSN: 1076-6332
DOI: 10.1016/j.acra.2008.05.023