Ultrasonic Imaging Technology Research Articles

Application of ultrasonic imaging technology in beef cattle breeding management

ObjectiveThe aim of this study was to explore in depth the application of ultrasonic imaging technology in beef cattle reproduction management in order to improve the efficiency and management of beef cattle reproduction. MethodsIn this study, ultrasonographic diagnostic techniques were used to follow up the follicles and corpus luteum in the uterus and ovaries of dairy cows at different stages of development as well as at different periods of gestation of dairy cows, and to detect the effects of different fattening conditions of the cows and the number of litters on the sitting rate. ResultsThe diameter of mature follicles was generally around 16 mm, and the majority of them were 11–20 mm in diameter. Ultrasonography was used to detect early pregnancy in cows at 33–55 d. Ultrasound was used to identify the sex of the foetus most easily at 70–80 d. The results of this study showed that the sex of the foetus was most easily identified in cows at 70–80 d. The fat of the cow and the number of births also had a significant impact on pregnancy rates. ConclusionUltrasound imaging technology has an important application value in the management of beef cattle reproduction, and in pregnancy detection, it can achieve early and accurate diagnosis, improve the accuracy of detection, and differentiate between heifers in estrus and pregnant heifers. In addition, it can also be used for foetal sex identification at a specific period of time, providing a basis for breeding programmes.

Study on non-destructive visualization identification of concrete internal cracks based on SH array ultrasound

Ultrasonic nondestructive testing (NDT) technology was one of the most frequently used and fastest-developing NDT techniques in detection field. This method had high detection sensitivity, more accurate defect localization, and was harmless to the human body. With the development of ultrasonic testing technology, modern ultrasonic imaging technology generally had automatic data acquisition and processing functions, which allowed for intuitive and clear recognition of internal defects by the human eyes. The overall purpose of this study was to visualize the cracks in concrete by synthetic aperture focusing technique (SAFT) and full-waveform inversion (FWI) algorithms on the basis of ultrasonic nondestructive testing technology. At present, there have been studies on the use of ultrasonic instruments to detect the internal defects of concrete. However, the accuracy and authenticity of this method have not been compared in previous studies. Therefore, in this experiment, four concrete specimens with different buried depths, angles, shapes, and thicknesses of cracks were designed. Based on SH ultrasonic wave NDT technology, two types of operations were performed on the collected ultrasonic wave data: one was the application of SAFT method, and the other was the first application of FWI method for detecting internal cracks in concrete. The study found that both algorithms were most accurate in determining the burial depth of cracks, with error results not exceeding 10 %. They also showed good recognition effects for the angle, shape, and thickness of the buried cracks. This proved that both identification methods had the capability to recognize internal cracks. The Introview software bundled with the ultrasonic instrument could identify cracks using SAFT directly and quickly. When FWI was used with MATLAB computation, the results were more precise and intuitive. The overall purpose of this study was to detect cracks in concrete by SAFT and FWI algorithms on the basis of ultrasonic nondestructive testing technology. Combining the two crack identification techniques could be of great significance for ensuring the long-term safety and stability of concrete structures, providing strong support for structural maintenance and reinforcement.

A Miniature PMUT Array for Medical Applications

Abstract Wearable continuous monitoring technology and internal and cerebrovascular imaging are the frontier hot area of current scientific research, which are of great significance to improving human life and health. Ultrasonic imaging can obtain information such as deep tissue structure by transmitting ultrasonic waves into the tissue and detecting echo signals, and ultrasonic imaging technology has the advantages of high imaging depth, high resolution, high safety, fast and convenient, etc. It is one of the important technologies in the medical field such as wearable continuous monitoring technology and internal cardiovascular and cerebrovascular imaging. But miniaturization and low power consumption are necessary conditions for the success of such medical applications. Therefore, the ultrasonic imaging technology using a miniature ultrasonic probe is one of the most promising imaging technologies for this type of medical application. Aiming at the common technical problems of traditional ultrasonic transducers such as large volume, narrow bandwidth, high power consumption, difficulty in preparing two-dimensional arrays, and difficulty in integrating with ICs. In this paper, the electromechanical-acoustic multi-field coupling mechanism and array structure design technology of MEMS high-performance PMUT ultrasonic transducer elements are first studied, and a CMOS-compatible miniature PMUT high-performance array ultrasonic device suitable for this type of medical application is developed. The simulation results of the transducer are given. The measurement of various physical parameters of the transducer sample and the results of its application in the ultrasonic imaging system show that the miniature PMUT linear array ultrasonic sensor we designed is a kind of high performance ultrasonic array sensors that can be widely used in wearable continuous monitoring technology and internal cardiovascular and cerebrovascular imaging.

SR-RDFAN-LOG: Arbitrary-scale logging image super-resolution reconstruction based on residual dense feature aggregation

In the process of oil and gas exploration and development, ultrasonic logging imaging technology visually displays the lithology, structure, fractures, pores, and other characteristics of the wellbore. This technology has been widely applied in the exploration and development of oil and gas resources. However, the low circumferential sampling rate negatively affects the imaging quality and resolution during drilling logging. To address the issues of low resolution and blurriness in ultrasonic logging images caused by these factors, as well as the limitation of existing super-resolution reconstruction algorithms that can only reconstruct fixed scales, this paper presents an Image Super-Resolution Reconstruction Network called Residual Dense Feature Aggregation (SR-RDFAN-LOG), which is specifically designed to improve ultrasonic logging image resolution. The proposed network consists of two stages, including encoding and decoding. In the encoding stage, a local feature extraction module is initially designed to integrate contextual features. Subsequently, a residual dense module is introduced for extracting deep features. Finally, a spatial attention module is constructed to focus on high-frequency details. In the decoding stage, a multilayer perceptron is used to decode the feature maps and achieve super-resolution reconstruction at arbitrary scales. The method is tested on an ultrasonic logging images test set with in-distribution scale factors of × 2 and × 4, and out-of-distribution scale factors of × 8 and × 16. When the scaling factors are × 2 and × 4, compared to the best-performing method, the peak signal-to-noise ratio (PSNR) increased by 0.4892 dB and 0.3849 dB, respectively, the structural similarity (SSIM) values increased by 0.0002 and 0.0012, respectively, and the learned perceptual image patch similarity (LPIPS) decreased by 0.0001 and 0.0008, respectively. Compared to the bicubic interpolation method, the LPIPS decreased by 0.0001 and 0.0008 at scale factors of × 8 and × 16, PSNR increased by 1.9614 dB and 2.1002 dB, respectively, and SSIM values increased by 0.0476 and 0.033, respectively. The LPIPS values decreased by 0.2233 and 0.1070, respectively. The experimental results demonstrate that our method outperforms other mainstream methods, achieves super-resolution reconstruction at arbitrary scale, and provides support for subsequent fracture-cave evaluation and oil and gas exploration.

Large rectangular cross-section tunnel undercrossing urban road by micro pipe jacking and joint assembly structure (MPJ & JAS) method in soft soils

With the continuous construction of urban traffic roads, more and more new roads are cut off by existing roads to form “dead end roads”. There is an urgent need for a trenchless method suitable for urban ultra-shallow overburden to build the undercrossing tunnel. To solve this problem, this paper proposed the micro pipe jacking and joint assembly structure (MPJ & JAS) method, which has the characteristics of shallow burial depth, low cost, short construction time, flexible cross-section setting and high space utilization. The MPJ & JAS method construct a large cross-section tunnel through assembling small cross-section elements, quite different from traditional methods. Therefore, this paper designed a CT-shaped integrated joint, the mechanical performance of which was verified and clarified by tensile test. The bending test and finite element (FE) analysis proved the reliability of MPJ & JAS tunnel structure, and confirmed the structure performances such as the failure models, crack behaviors, load–deflection response and stress–strain distribution. Moreover, the influences of the steel plate thickness, concrete strength and shear connector spacing were determined by the FE analysis. On the basis of test results and reasonable assumptions, a theoretical design method considering the influence of the CT-shaped integrated joint was proposed, which can effectively predict the bending strength of the MPJ & JAS tunnel structure with an error of less than 10%. Finally, in view of the characteristics of the MPJ & JAS method, the suitable micro pipe jacking machine, soil reinforcement measure, hydraulic traction construction technology, high-precision guidance system and concrete construction quality detection method based on the phased array ultrasonic imaging technology were developed, supporting the accurate and efficient construction of the MPJ & JAS tunnel.

Clinical Application of Ultrasound Elastic Imaging in Assessing Poststroke Complex Regional Pain Syndrome (CRPS).

This study aimed to explore the characteristics and clinical application of ultrasonic elastography in peripheral soft tissue in patients with poststroke complex regional pain syndrome (CRPS). Complex regional pain syndrome (CRPS) type I is also known as shoulder hand syndrome (SHS). Its main symptoms include shoulder pain, limited activity, upper arm, wrist, and knuckle joint pain. Ultrasonic elastic imaging technology is gradually being applied to musculoskeletal system evaluation, primarily for the elastic examination of superficial tissue, as a result of the continual advancements in ultrasound technology. To make up for the absence of conventional imaging, functional state evaluation of the motor system can offer conventional ultrasonic tissue elasticity and hardness data. The purpose of this study was to objectively quantify the soft tissue surrounding the shoulder joint of stroke patients with CRPS using ultrasonic elastic imaging and to determine the diagnostic usefulness of ultrasonic elastic imaging for CRPS in stroke in order to promote its usage in clinical practice. Patients diagnosed with CRPS following a stroke and admitted to the rehabilitation unit at Shanxi Bethune Hospital between January, 2021 to June, 2021 were included in the analysis. The control group consisted of people without pain in their shoulder joints. Each group consisted of 30 patients. A high-frequency wire array probe (frequency = 8-16 Hz) was employed in conjunction with an ultrasonic diagnostic apparatus. A quantitative analytic system determined Young's modulus of the tissue, while the tracking of the shear wave provided an elastin map in real-time. An excitation pulse of acoustic radiation force was used to cause shear waves in the tissue. The Young's modulus of supraspinatus muscle in the study and control groups was 289.16±22.07 Kpa and 231.99±23.61 Kpa, respectively (P <0.01). Young's modulus values of the study group's subscapular biceps were compared to those of the control group (P > 0.05). The supraspinatus shear wave elastographic (SWE) imaging value was 10.01±0.49 m/s in the study group and 7.92±0.50 in the control group (P <0.05). The study and control groups had subscapular muscle SWE values of 15.99±1.95 and 8.64±0.56 m/s, respectively (P <0.05). The average biceps tendon SWE value in the study and control groups was 6.39±0.42 and 4.69±0.36 m/s, respectively (P <0.05). In conclusion, the SWE assessed by ultrasound elastography is useful for early diagnosis and evaluation of the superior shoulder tendon, subscapular tendon, and biceps tendon of CRPS following stroke.

Secondary Interface Echoes Suppression for Immersion Ultrasonic Imaging Based on Phase Circular Statistics Vector.

Immersion ultrasonic phased array imaging technology offers great advantages, particularly in coupling and automatic detection of industrial non-destructive testing (NDT). To suppress the influence of secondary interface echoes in the immersion ultrasonic phased array imaging, a novel phase circular statistics vector (PCSV) weighting method is proposed in this paper. Firstly, the PCSV factor matrix is established according to the phase consistency of the echo signals. Secondly, due to the higher phase coherence of the defect echo, the PCSV factor matrix is used to weight the TFM image to suppress the secondary interface echo. The result shows the secondary interface echoes are effectively suppressed in the total focusing method (TFM) image on a 0~40 dB scale. It is also shown that PCSV weighting could not only suppress the secondary interface echoes but also improved the image quality in terms of SNR and lateral resolution by comparing with traditional TFM.

New Progress in Ultrasound Molecular Imaging

With the development of molecular imaging, ultrasound imaging is no longer a means to diagnose diseases, but to the molecular level of accurate medical treatment. The tool of ultrasonic molecular imaging is ultrasound contrast medium. in order to meet the diversified clinical needs, ultrasound contrast agent has developed from the first generation and the second generation to multimodal contrast agent. Targeted ultrasound contrast agent can carry corresponding biomarker factors for localization, imaging and treatment of lesions, which is an important development direction to achieve accurate ultrasound diagnosis and treatment. In this paper, the research progress of ultrasonic molecular imaging technology is reviewed.

Application and research progress of ultrasound in acupuncture treatment

The operation standardization, quantitative standard and safety of acupuncture treatment are important links in the development of acupuncture modernization. In recent years, with the continuous development of ultrasonic imaging technology, ultrasonic medicine has the characteristics of visualization, quantitative analysis and real-time dynamics, which could play a unique role in acupuncture treatment. In this paper, the research progress of the combined application of ultrasonic medicine and acupuncture treatment is described from three aspects: ultrasound guidance helping to standardize acupuncture operation, ultrasound guidance helping to improve and evaluate the clinical efficacy of acupuncture, and ultrasound guidance helping to improve the safety of acupuncture, aiming to providing new ideas for the application of modern medicine in traditional medicine.

High-resolution ultrasonic imaging technology for the damage of concrete structures based on total focusing method

Concrete has diverse internal acoustic interface, and the scattering of ultrasonic wave is serious and complicated. Based on total focusing method (TFM) imaging, this paper investigates the concrete inspection resolution optimization method. Firstly, the reinforced concrete model was simulated, using time reversal (TR) algorithm to process the signal, the defects and rebars signal amplitudes increased by 7.6 dB and 4.7 dB, respectively. Then in order to reduce the structural noise, the phase coherence imaging (PCI) algorithm was applied, resulting in a signal-to-noise ratio (SNR) improvement of about 22.2 dB on average. Finally, the imaging positions were corrected. In the experiment, to eliminate the influence of the probe ringing on the detection signal, digital filtering was introduced to restore the signal wave packet,and the image SNR was improved by 3.2 dB after TR processing and by 9.4 dB after PCI processing.

Ultrasonic signal noise reduction based on convolutional autoencoders for NDT applications

One of the most challenging problems of ultrasonic non-destructive testing is the signal distortion caused by the presence of noise, yielding the sound wave corruption and thus degrading the ultrasonic imaging technology performance due to Time of flight methods’ loss of precision. Deep learning algorithms have proven their effectiveness in reducing noise on several types of signals in different domains. In this paper, we propose a one-dimensional convolutional autoencoder for ultrasonic signal denoising. The efficiency of the proposed architecture is compared to the wavelet decomposition method, collating the peak signal-to-noise ratio values on the denoised signals. Our method proved its potential for NDT applications in recovering temporal information even on very noisy signals, and improving the PSNR by about 30 dB.

Study on Ultrasonic Imaging of Nursing Care for Preventing and Treating Clinical Infection of Hemodialysis Patients Based on Smart Medical Big Data.

The ultrasonic imaging research of nursing care for preventing and treating clinical infection of hemodialysis patients based on smart medical big data is studied. 100 hemodialysis patients were selected from May 2019 to May 2020. The patients were randomly divided into the observation group and routine group with 50 cases in each group. The PWV of common carotid artery was measured by ultrasonic rapid imaging technology, including BS value at the beginning of systole and ES value at the end of systole. According to the effect of preventive nursing intervention of intelligent medical treatment, the MHD group adopted preventive nursing intervention, while the routine group adopted traditional nursing service. The infection rate and quality of life score of patients in both groups were evaluated. The results showed that there were significant differences in BS and ES values between the MHD group and PWV in the normal group (P < 0.05). There was no significant difference in BS value and ES value between MHD patients with plaque and those without plaque (P > 0.05). It is proved that the ultrafast ultrasound imaging technology is safe, simple, noninvasive, nonradioactive, and fast and can automatically and accurately detect carotid PWV. It is expected to become a new imaging method for quantitative evaluation of arteriosclerosis degree in MHD patients. Preventive nursing intervention can reduce the incidence of infection in hemodialysis patients and improve their quality of life. Smart medical treatment has brought us a lot of convenience. As patients, we should change our concept, actively participate in it, and contribute to the development of smart medical treatment.

Non-Modified Ultrasound-Responsive Gas Vesicles from Microcystis with Targeted Tumor Accumulation.

IntroductionUltrasonic molecular imaging (UMI) technology has attracted increasing interest because of its low cost and capability to evaluate changes rapidly and noninvasively at the cellular and molecular levels. The key material of this technology is ultrasound-responsive gas vesicles (GVs). GVs synthesized by conventional chemical methods have several limitations, such as high costs, low yields, and complex production processes. In comparison, biosynthesized GVs have the advantages of high stability, a low risk of toxicity, genetic engineering characterization, easy post modification and drug loading potential. However, translational studies of their biosynthesis are still in their infancy; in particular, the duration of GVs in the circulatory system is essential for the usage of UMI in biomedicine and the clinic.ResultsHere, we report novel GVs biosynthesized by the cyanobacterium Microcystis, which have a moderate size, a negative zeta potential, a rod-like morphology, and a protein-shelled gas-contained structure. These GVs without any chemical modifications could be detected in the mice circulatory system for more than 10 hours by clinically used ultrasound scanners. In particular, GVs can accumulate in tumors via the enhanced permeation and retention (EPR) effect 11 hours post-injection, and lasting at least 2 hours, which might be a potential aid for tumor diagnosis. Furthermore, pathological and hematological study suggested that GVs are safe for the host.ConclusionWe concluded that the GVs synthesized by Microcystis without any modifications have UMI potential for systemic evaluation as well as tumoral diagnosis after intravenous injection.

The Value of Ultrasonic Elastographic Parameters in the Evaluation of Chronic Hepatitis B Liver Fibrosis

Chronic hepatitis B is one of the common chronic infectious diseases in China, which seriously endangers people’s health. Liver fibrosis is a common pathological process of chronic hepatitis B. The routine diagnosis and prediction of the degree of liver fibrosis are of great value and significance to the judgment of liver disease, clinical treatment, and the corresponding late evaluation. However, the traditional detection and treatment methods are often invasive, and the corresponding diagnosis and treatment costs are very high, which makes it difficult for the corresponding patients in clinical and practical applications to accept, and the corresponding liver tissue samples are relatively limited in technology. In this paper, based on ultrasound elastography technology, it will give full play to its advantages of real-time, non-invasive, and repeatable detection, and realize an effective method for non-invasive diagnosis of liver fibrosis. In the practical application, this paper mainly focuses on the study and analysis of the patients with hepatitis B liver fibrosis using the RTE ultrasonic elastic imaging technology. Following this, 120 patients with chronic hepatitis B were selected for the experiment, and a non-invasive diagnostic model of ultrasonic elastic imaging based on a support vector machine was proposed. The experimental results showed that the diagnostic model proposed in this paper improves the diagnostic accuracy by 5% compared with the traditional diagnostic technology, while the corresponding specificity, positive predictive value, and diagnostic advantage are improved. Therefore, as a whole, the ultrasound elastic imaging model proposed in this paper could realize the efficient diagnosis of hepatitis B liver fibrosis and is conducive to the clinical management.

The Use of Ultrasonic Imaging Technology in the Diagnosis and Treatment of Functional Dyspepsia

Objective: Through the research on the application of ultrasound image technology in the diagnosis and treatment of functional dyspepsia, the value of ultrasound image technology in the treatment of functional dyspepsia is discussed, which verifies the effectiveness and superiority of ultrasound image technology in the diagnosis and treatment of functional dyspepsia. Methods: In this experiment, functional dyspepsia patients who are treated in the Department of Gastroenterology of a comprehensive third grade a hospital and healthy volunteers are taken as the research objects. Among them, healthy adults are in group A, i. e., control group. There is no obvious digestive tract disease within 2 years. Patients with functional dyspepsia are in group B. After that, the liquid standard nutrition meal is prepared. Both groups need to carry out liquid application meal load test according to the steps. Then, the initial and maximum satiety intake of each group is recorded, and ultrasound imaging technology is used to locate the distal and proximal gastric sections of the two groups. Then, the area of the distal and proximal stomach is recorded at the time of initial satiety, the time of maximum satiety and the time after drinking. After that, according to the area, volume and other relevant data are calculated, the data are input into the database, and SPSS22.0 is used to analyze the data. Results: The time of proximal gastric semi emptying is compared between group B and group A. It is found that the time of proximal gastric semi emptying is longer in group B. In addition, it is found that the time of distal gastric semi emptying in group B is longer than that in group A. There is significant difference in the time of proximal gastric semi emptying and distal gastric semi emptying between the two groups (P &lt; 0.05). In group B, when the initial satiety of liquid standard diet is achieved, the intake is significantly less than that of healthy adults. It is found that the proximal gastric volume of group B is smaller than that of the control group. The intake and proximal gastric volume of the two groups are statistically significant (P &lt; 0.05). There are significant differences between the two groups in the maximum satiety, 30 minutes after meal and 60 minutes after meal (P &lt; 0.05). Conclusion: Ultrasonic imaging technology can monitor the patients' stomach volume and the maximum and minimum intake in real time. Through monitoring, the sensitivity of patients' stomach and some functional abnormalities can be known in time, which is of great significance for the treatment and diagnosis of functional dyspepsia.

Research on Rapid Evaluation of Rock Mass Quality Based on Ultrasonic Borehole Imaging Technology and Fractal Method

The distribution of discontinuities in the deep stratigraphic rock mass is random and irregular, and the spatial distribution has statistical self‐similarity, which can be analyzed by fractal theory. The borehole wall image obtained based on the ultrasonic borehole imaging technology can clearly reflect the rich structural surface information such as the inclination, density, and crack width of the structural surface in the rock mass. Due to its inherent fractal characteristics, the fractal box dimension of the hole wall image can be used to describe the complexity of the structural surface. In the study, the fractal box dimension of the hole wall image and the RQD value of the rock mass are compared, and it is found that there is a linear correlation between the two. Therefore, the rock quality can be evaluated according to the fractal box dimension value of the hole wall image. Finally, a rapid quantitative evaluation method for rock mass quality classification is established based on ultrasonic borehole imaging technology and fractal method.

Study on the Effect of Focused Ultrasound Excitation on Image Resolution Based on Computer Technology

With the continuous development of modern science and technology, ultrasonic testing is applied in various fields, and plays an important role in the field of detection. Ultrasound imaging is mainly used in medicine to detect the health of internal organs and to defect fetal development in obstetrics and gynecology. In addition, ultrasonic wave is widely used in welding inspection in the mechanical industry, and the downhole ultrasonic imaging is used in tunnel engineering. With the development of ultrasonic testing technology, there are many kinds of ultrasonic testing methods at present. This paper mainly discusses the influence of focused Based on Computer Technologyultrasonic’s excitation on imaging resolution, and finds out the law to perfect the ultrasonic testing means and improve the final imaging resolution. Focused ultrasonic excitation, also known as ultrasonic phased array detection technology, is an emerging non-destructive testing technology that has been developed and popularized in recent years[1]. Discussing and studying the influence of focused ultrasonic excitation on imaging resolution is of great significance to optimize this new technology. In the development of ultrasonic imaging technology, it is the responsibility of every relevant researcher to constantly explore ways to optimize the technology.

Highly Sensitive Photoacoustic Imaging: A New Strategy for Ultrahigh Spatial Resolution Seismic Physical Model Imaging

Seismic-physical-model imaging (SPM), a successful strategy for the research in seismic wave propagation and wave theoretical predictions, effectively bridges the computation modeling and the field exploration and leads to a nearly ideal setting without a rock matrix. However, the current strategy for SPM imaging, the ultrasonic imaging technology, shows a narrow excitation frequency and a low coupling efficiency, which strongly limit the resolution of the image. Herein, laser ultrasonic imaging strategy, an imaging strategy which merges the large penetration depth of ultrasound imaging and high contrast of optical imaging, is developed for SPM imaging for the first time, where photoacoustic (PA) effect is utilized for the excitation. A customized contrast agent, Co3O4 nanoflake arrays (CONAs), is designed for this special application of photoacoustic imaging in a large-scale via a facile hydrothermal method. The PA properties of the as-prepared CONAs are investigated with both theoretical and experimental methods. The results demonstrate the CONAs enhance the response signal over 16 times due to the strong light absorption, high photoacoustic-to-acoustic transformation efficiency and excellent thermal stability of the CONAs. By applying PA technology with the assistance of CONAs, 3D SPM images with high resolution are achieved.

A Novel Improved Multi-Point Matching Based Coronary Disease Quantitative Analysis for Speckle Tracking in Ultrasound Image

Ultrasonic imaging technology is one of the most direct and effective methods, which can prevent, treat cardiovascular disease, and it can make noninvasive observation and detection of cardiac motion. To calculate accurate myocardial motion parameters more directly, effectively and accurately, speckle tracking algorithm is put forward. However, the performance of speckle tracking is directly related to the diagnosis effect of coronary disease. Compared with the speckle tracking algorithm based on optical flow algorithm, the speckle tracking algorithm based on block matching algorithm has advantages of higher tracking accuracy and faster computation speed and better anti-interference immunity. According to the requirements of clinical application, the full search block matching algorithm whose accuracy is the highest is adopted as the basic algorithm of the speckle tracking algorithm. In paper, In view of the shortcomings of the full search block matching algorithm, the algorithm based on calculating tracking error is proposed. The speckle tracking algorithm based on calculating tracking error has good tracking results, which shows that this algorithm can effectively improve the applicability, stability and accuracy of tracking in different ultrasound images and multi-point tracking in the same ultrasound images.

Advances in the Diagnosis of Breast Tumor by Using Imaging Technology

Breast tumor is the most common tumor in the world. The most important method to reduce the mortality due to breast tumor is diagnosed and found as early as possible. Imaging technology is one of the most important means to help doctors diagnose tumor early. This paper first simply introduces the common imaging technology. Then the mechanism and application of the ultrasonic elastic imaging technology in the diagnosis of breast tumor are summarized and discussed detailly. The methods for image treatment are introduced also. At last the development trend is analyzed. It is shown that the ultrasonic imaging technology is the most convenient and the cheapest relative to other imaging technologies such as nuclear magnetic imaging (NMI) and computer tomography (CT). Especially the ultrasonic elastic imaging technology can provide not only imaging information but also mechanism parameters, which helps to improve the accuracy of diagnosis obviously. Therefore, the ultrasonic elastic imaging technology is worthy of being studied further. More effective image analysis method is required.