In this study, experiments and simulations on tissue ablation were performed to investigate the effectiveness of multi-frequency focused ultrasound (FUS) with frequency differences more than 500 kHz (950 kHz, 1.5 MHz and 3.3 MHz FUS). In tissue ablation tests, temperature rise was recorded when chicken breast tissue was ablated by FUS with single-frequency and multi-frequency ultrasound, respectiv...Show More
This paper presents a method to simultaneously regularize diffusion weighted images and their estimated diffusion tensors, with the goal of suppressing noise and restoring tensor information. We enforce a data fidelity constraint, using coupled robust anisotropic diffusion filters, to ensure consistency of the restored diffusion tensors with the regularized diffusion weighted images. The filters a...Show More
While instant message (IM) is gaining its popularity it is exposed to increasingly severe security threats. A serious problem is IM spam (spim) that is unsolicited commercial messages sent via IM messengers. Unlike e-mail spam (unsolicited bulk e-mails), which has been a serious security issue for a long time and a number of techniques have been proposed to cope with, spim has not received adequat...Show More
The clinical recognition of abnormal vascular tortuosity, or excessive bending, twisting, and winding, is important to the diagnosis of many diseases. Automated detection and quantitation of abnormal vascular tortuosity from three-dimensional (3-D) medical image data would, therefore, be of value. However, previous research has centered primarily upon two-dimensional (2-D) analysis of the special ...Show More
