speckle in ultrasound b-mode scans:b超扫描中的散斑 下载积分: 1500 内容提示: IEEE TRANSACTIONS ON SONICS AND ULTRASONICS, VOL. SU-25, NO. 1, JANUARY 1978 1 Speckle in Ultrasound B-Mode Scans CHRISTOPH B. BURCKHARDT, MEMBER, IEEE Abstract-Ultrasound images obtained with a simple linear or ...
/4/, are extended in this paper in order to investigate speckle in ultrasound computerized reflection mode tomography (UCTR). UCTR can be explained as a numerical superposition of several B-Scans of a cross-sectional plane obtained from different aspect angles. The superposition consists of a ...
Experiments are carried out using a synthetically generated B-mode ultrasound image, a computer generated cyst image and real ultrasound images. The performance of the proposed technique is compared with Lee, homomorphic wavelet and squeeze box filter (SBF) in terms of noise variance reduction, mean...
In the ultrasound imaging process, the complex summation at the transducer face is assumed to be linear. The envelope detection process in B-scanning is a nonlinear step which yields essentially the magnitude of the complex field or voltage. It is shown that Rayleigh statistics govern the first-...
B. (1978). Speckle in ultrasound B-mode scans. IEEE Transactions on Sonics and Ultrasonics, 25(1), 1–6. Article Google Scholar Chang, S. G., Yu, B., & Vetterli, M. (2000). Adaptive wavelet thresholding for image denoising and compression. EEE Transactions on Image Processing, 9(9...
The block diagram of the ultrasound B-scan data collection system that has been developed for obtaining ultrasound reflection data is shown in Fig. 1. The system employs a focused transducer, which is mechanically scanned over a linear path to collect image data (B-scans). The transducer and ...
We optimized light transmission to the sample by applying ultrasound gel to the mouse skin and covering the gel with a 2 mm-thick one-sided antireflective- coated glass (650–1,050 nm), with the coating at the air–glass interface. For retinal and corneal imaging studies, mice were ...
All strain values were measured in the axial direction, where resolution is at least an order of magnitude greater than that in the lateral direction. Thus, the axial strain is more accurate due to the direction of the beam. Ultrasound data and video B-scans were obtained...
The example of the B-mode images obtained for each stage is illustrated in Figure 3. Tracking feasibility, defined as the number of scans for which the global parameters could be extracted, was Discussion The main findings of this study are that (i) that HFR STE during stress echocardiography...
ultrasound signals. This paper addresses the specific problem of defining and reducing the effects of speckle in ultrasound pulse-echo B-mode images. The reduction of speckle may be usefully regarded as a two stage procedure, consisting of (i) recognition - is the texture present in a clinical...