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Acoustic radiation force impulse

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https://www.readbyqxmd.com/read/28339492/a-preliminary-study-of-skin-ultrasound-in-diffuse-cutaneous-systemic-sclerosis-does-skin-echogenicity-matter
#1
He Liu, Yong Hou, Qing-Li Zhu, Dong Xu, Liang Wang, Jian-Chu Li, Yu-Xin Jiang, Qian Wang, Meng-Tao Li, Feng-Chun Zhang, Xiao-Feng Zeng
OBJECTIVE: To evaluate the usefulness of skin ultrasound and acoustic radiation force impulse (ARFI) quantification in diffuse cutaneous systemic sclerosis (dcSSc). PATIENTS AND METHODS: 28 patients with dcSSc, and 15 age gender matched normal controls were recruited. Skin echogenicity, thickness, and ARFI quantification were measured by ultrasound at 17 sites corresponding to the modified Rodnan skin score (mRSS) in each participant. Compared with controls, skin echogenicity of dcSSc patients was classified into isoechoic, hypoechoic, and hyperechoic...
2017: PloS One
https://www.readbyqxmd.com/read/28328804/liver-function-in-alpha-1-antitrypsin-deficient-individuals-at-37-to-40-years-of-age
#2
Behrouz Mostafavi, Sandra Diaz, Hanan A Tanash, Eeva Piitulainen
Severe alpha-1-antitrypsin (AAT) deficiency (PiZZ) is a risk factor for liver disease, but the prevalence of liver cirrhosis and hepatocellular cancer in PiZZ adults is unknown. The risk of liver disease in adults with moderate AAT deficiency (PiSZ) is also unknown. A cohort of 127 PiZZ, 2 PiZnull, 54 PiSZ, and 1 PiSnull individuals were identified by the Swedish national neonatal AAT screening program between 1972 and 1974, when all 200,000 newborn infants in Sweden were screened for AAT deficiency. The cohort has been followed up since birth...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28298942/liver-acoustic-radiation-force-impulse-arfi-in-childhood-obesity-comparison-and-correlation-with-biochemical-markers
#3
COMPARATIVE STUDY
Rajeev Kamble, Kushaljit S Sodhi, Babu R Thapa, Akshay K Saxena, Anmol Bhatia, Devi Dayal, Niranjan Khandelwal
PURPOSE: To compare and correlate the diagnostic efficiency of acoustic radiation force impulse (ARFI) elastography with biochemical markers for assessing hepatic changes in overweight and obese children. METHODS: This prospective study was approved by the institutional ethics committee. It included 54 overweight and obese children and 50 normal children (as a control group) in the age range 5-18 years. For all children, we performed grayscale ultrasonography to diagnose fatty liver, ARFI elastography to measure liver stiffness, and biochemical evaluation for aspartate aminotransferase (AST), alanine aminotransferase (ALT), and serum triglyceride (TG) levels...
March 2017: Journal of Ultrasound
https://www.readbyqxmd.com/read/28285729/evaluation-of-post-stroke-spastic-muscle-stiffness-using-shear-wave-ultrasound-elastography
#4
Chueh-Hung Wu, Yu-Chun Ho, Ming-Yen Hsiao, Wen-Shiang Chen, Tyng-Guey Wang
Current clinical evaluations of post-stroke upper limb spasticity are subjective and qualitative. We proposed a quantitative measurement of post-stroke spastic muscle stiffness by using shear-wave ultrasound elastography and tested its reliability. Acoustic radiation force impulse with shear wave velocity (SWV) detection was used to evaluate stiffness of the biceps brachii muscles at 90° and 0° elbow flexion. In 21 control subjects, SWV did not significantly differ between dominant and non-dominant sides at either flexion angle (0°: p = 0...
March 9, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28271231/quantitative-assessment-of-muscle-stiffness-with-acoustic-radiation-force-impulse-elastography-after-botulinum-toxin-a-injection-in-children-with-cerebral-palsy
#5
Meltem Ceyhan Bilgici, Tumay Bekci, Yasemin Ulus, Ayhan Bilgici, Leman Tomak, Mustafa Bekir Selcuk
PURPOSE: Our objective in this study was to assess the changes in medial gastrocnemius muscle (GCM) stiffness after botulinum toxin A (BTA) injection in children with cerebral palsy (CP) by using acoustic radiation force impulse (ARFI) elastography and to research the usability of this technique in clinical practice. MATERIALS AND METHODS: Twenty-four spastic lower extremities of 12 children with CP were assessed. BTA injection treatment was applied to the medial GCM...
March 7, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/28268914/shear-wave-elastography-using-wigner-ville-distribution-a-simulated-multilayer-media-study
#6
Pooya Sobhe Bidari, Javad Alirezaie, Jahan Tavakkoli
Shear Wave Elastography (SWE) is a quantitative ultrasound-based imaging modality for distinguishing normal and abnormal tissue types by estimating the local viscoelastic properties of the tissue. These properties have been estimated in many studies by propagating ultrasound shear wave within the tissue and estimating parameters such as speed of wave. Vast majority of the proposed techniques are based on the cross-correlation of consecutive ultrasound images. In this study, we propose a new method of wave detection based on time-frequency (TF) analysis of the ultrasound signal...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28267542/comparison-between-acoustic-radiation-force-impulse-quantification-data-and-perfusion-ct-parameters-in-hepatocellular-carcinoma
#7
Michael Esser, Sven Schneeweiß, Manuel Kolb, Mustafa Kurucay, Christer Ruff, Konstantin Nikolaou, Marius Horger
OBJECTIVE: To find out, if ultrasound elastography of hepatocellular carcinoma (HCC) can predict patterns of tumor perfusion in volume perfusion computed tomography (VPCT). MATERIAL AND METHODS: 25 consecutive patients (mean age, 68.9; range, 51-85 years) with liver cirrhosis suspected of HCC underwent VPCT and acoustic radiation force impulse (ARFI) elastography the same day. Quantitative elasticity values were registered, while blood flow (BF), blood volume (BV) and hepatic perfusion index (HPI) of the HCC lesions were calculated...
April 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28260293/-clinical-value-of-acoustic-radiation-force-impulse-technique-to-predict-esophageal-and-gastric-varices-in-patients-with-biliary-atresia
#8
G Y Zhang, Y Tang, N N Niu, H T Wu
Objective: To investigate the clinical value of acoustic radiation force impulse (ARFI)technique in predicting esophageal and gastric varices in patients with biliary atresia after Kasai portoenterostomy. Methods: A total of 42 patients with biliary atresia after Kasai portoenterostomy were collected from September 2015 to May 2016 in Tianjin First Central Hospital.ARFI technique was used to measure the stiffness of liver and spleen, and 28 healthy children as control.According to the result of CT examination , patients with biliary atresia were divided into two groups , twenty-three patients with esophageal and gastric varices(A group) and nineteen patients without esophageal and gastric varices (B group), Comparing the difference of liver and spleen stiffness between the two groups...
February 21, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28244127/acoustic-radiation-force-impulse-and-doppler-ultrasonography-comprehensive-evaluation-of-acute-rejection-after-liver-transplantation
#9
Ying Tang, Jingwen Zhao, Huimin Yu, Hongtao Wu, Ningning Niu
OBJECTIVES: The aim of our study was to evaluate the clinical application of color Doppler flow imaging (CDFI) and acoustic radiation force impulse (ARFI) for the diagnosis of acute rejection after liver transplantation. METHODS: B-Mode CDFI and ARFI assessments were performed in 76 patients who underwent biopsy after liver transplantation at our institution, between October 2011 and October 2014. The study group included 56 patients with acute rejection confirmed by biopsy, with 20 patients whose liver function recovered within 1 month of transplantation forming the control group...
February 28, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28227118/shear-wave-elastography-using-wigner-ville-distribution-a-simulated-multilayer-media-study
#10
Pooya Sobhe Bidari, Javad Alirezaie, Jahan Tavakkoli, Pooya Sobhe Bidari, Javad Alirezaie, Jahan Tavakkoli, Javad Alirezaie, Jahan Tavakkoli
Shear Wave Elastography (SWE) is a quantitative ultrasound-based imaging modality for distinguishing normal and abnormal tissue types by estimating the local viscoelastic properties of the tissue. These properties have been estimated in many studies by propagating ultrasound shear wave within the tissue and estimating parameters such as speed of wave. Vast majority of the proposed techniques are based on the cross-correlation of consecutive ultrasound images. In this study, we propose a new method of wave detection based on time-frequency (TF) analysis of the ultrasound signal...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28222500/conventional-us-combined-with-acoustic-radiation-force-impulse-imaging-arfi-for%C3%A2-prediction-of-triple-negative-breast-cancer-and-the-risk-of-lymphatic-metastasis
#11
Huan Pu, Li-Xia Zhao, Ming-Hua Yao, Guang Xu, Hui Liu, Huixiong Xu, Rong Wu
PURPOSE: To evaluate the combination of conventional ultrasound (US) and acoustic radiation force impulse imaging (ARFI) in predicting triple-negative breast cancer and the likelihood of lymphatic metastasis. MATERIALS AND METHODS: In total 178 women presenting from May 2013 to September 2015 with pathologically proven triple-negative (n = 60) or hormone receptor (HR)-positive/human epidermal growth factor receptor 2 (HER2)-negative breast cancer (n = 118) were reviewed...
February 4, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28214021/arfi-elastography-changes-after-direct-acting-antiviral-treatment-in-transplanted-livers-with-relapse-of-hepatitis-c-virus-infection
#12
M Alfageme Zubillaga, T Fontanilla Echeveste, I Pérez González, A Royuela Vicente, A M Duca, R M Ruiz Peralbo, C González Hernando
OBJECTIVE: To evaluate the changes in the values obtained in acoustic radiation force impulse (ARFI) elastography of the liver after antiviral treatment in patients with liver transplants and hepatitis C virus (HVC) infection recurring after transplantation. MATERIAL AND METHODS: We studied 15 patients infected with HVC who had received liver transplants where an HVC infection recurring in the graft within one year after the transplant was treated with direct-acting antivirals...
February 14, 2017: Radiología
https://www.readbyqxmd.com/read/28180200/acoustic-radiation-force-impulse-elastosonography-of-placenta-in-maternal-red-blood-cell-alloimmunization-a-preliminary-and-descriptive-study
#13
Orkun Cetin, Erbil Karaman, Harun Arslan, Ibrahim Akbudak, Recep Yıldızhan, Ali Kolusarı
AIMS: Maternal red blood cell alloimmunization is an important cause of fetal morbidity and mortality in the perinatal period, despite well-organized prophylaxis programs. The objective of the study was to evaluate placental elasticity by using Acoustic Radiation Force Impulse (ARFI) in Rhesus (Rh) alloimmunized pregnant women with hydropic and nonhydropic fetuses and to compare those with healthy pregnant women. MATERIAL AND METHODS: This case-control and descriptive study comprised twenty-eight healthy pregnant women, 14 Rh alloimmunized pregnant women with nonhydropic fetuses, and 16 Rh alloimmunized pregnant women with hydropic fetuses in the third trimester of pregnancy...
January 31, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/28180193/acoustic-radiation-force-impulse-arfi-elastography-for-non%C3%A2-invasive-evaluation-of-hepatic-fibrosis-in-chronic-hepatitis-b-and-c-patients-a-systematic-review-and-meta-analysis
#14
Xiangdong Hu, Lanyan Qiu, Dong Liu, Linxue Qian
AIM: The purpose of the study was to assess the effect of Acoustic Radiation Force Impulse (ARFI) elastography in the diagnosis of liver fibrosis in chronic hepatitis B and C patients through Meta-analysis. MATERIAL AND METHODS: Four databases (PubMed, the Cochrane Library, WanFang data, and CNKI) were searched. The key words were: ("ARFI" or "acoustic radiation force impulse") combined with "liver fibrosis" and ("chronic hepatitis" or "HBV HCV"). Heterogeneity (I2) was assessed, and its source was analyzed through meta-regression...
January 31, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/28151749/clinical-usefulness-and-performance-of-acoustic-radiation-force-impulse-in-patients-with-chronic-hepatitis-b
#15
Coskun Ozturker, Ergenekon Karagoz, Ali K Sivrioglu, Kemal Kara
AIM: The aim of this study was to evaluate the performance of acoustic radiation force impulse (ARFI) compared with liver biopsy in quantifying fibrosis levels in patients with chronic hepatitis B (CHB). PATIENTS AND METHODS: The study was approved by the institutional review board at our hospital. One hundred CHB patients and 30 healthy controls (130 individuals) were included in the study. ARFI measurements were performed on all of these cases. CHB was diagnosed when serum hepatitis surface antigen was positive for more than 6 months and when persistent or intermittent elevations in alanine aminotransferase and aspartate aminotransferase levels and histopathological changes in liver biopsy were present...
February 1, 2017: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28138404/acoustic-radiation-force-impulse-imaging-of-kidneys-a-phantom-study
#16
Szymon Cygan, Magdalena Januszewicz
AIM OF THE STUDY: Since there have been only few works reporting the diagnosis of kidneys using Acoustic Radiation Force Impulse technique and those works do not provide consistent results of shear wave velocity measurements in renal tissue, we have decided to use kidney phantoms with known properties to examine the reliability of the method itself in a controlled setup similar to kidneys examination. MATERIALS AND METHODS: Four gelatin-based phantoms imitating different clinical situations were manufactured - two with thick and two with thin renal cortex, each type at a depth similar to a normal-weight or overweight patient...
December 2016: Journal of Ultrasonography
https://www.readbyqxmd.com/read/28130908/aspartate-transaminase-platelet-ratio-and-fibrosis-4-indices-as-effective-markers-for-monitoring-esophageal-varices-in-hiv-hepatitis-c-virus-co-infected-patients-due-to-contaminated-blood-products-for-hemophilia
#17
Koji Natsuda, Mitsuhisa Takatsuki, Takayuki Tanaka, Akihiko Soyama, Tomohiko Adachi, Shinichiro Ono, Takanobu Hara, Zhassulan Baimakhanov, Hajime Imamura, Satomi Okada, Masaaki Hidaka, Susumu Eguchi
AIM: We examined the feasibility of the aspartate transaminase (AST)-platelet ratio index (APRI) and Fibrosis-4 (FIB4) score, which are well-established markers for liver fibrosis, as indicators for monitoring esophageal varices in patients who were co-infected with HIV and hepatitis C virus (HCV) due to contaminated blood products for hemophilia in Japan. METHODS: Forty-three HIV/HCV co-infected patients were enrolled. All were hemophilic men (median age 41 years; range, 29-66 years)...
January 28, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/28127192/evolving-strategies-for-liver-fibrosis-staging-non-invasive-assessment
#18
EDITORIAL
Cristina Stasi, Stefano Milani
Transient elastography and the acoustic radiation force impulse techniques may play a pivotal role in the study of liver fibrosis. Some studies have shown that elastography can detect both the progression and regression of fibrosis. Similarly, research results have been analysed and direct and indirect serum markers of hepatic fibrosis have shown high diagnostic accuracy for advanced fibrosis/cirrhosis. The prognosis of different stages of cirrhosis is well established and various staging systems have been proposed, largely based on clinical data...
January 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28118179/two-dimensional-shear-wave-elastography-a-new-method-comparable-to-acoustic-radiation-force-impulse-imaging
#19
Barbara Schellhaas, Deike Strobel, Dane Wildner, Ruediger S Goertz, Markus F Neurath, Lukas Pfeifer
OBJECTIVES: Two-dimensional shear-wave elastography (2D-SWE) is an ultrasound-based technique for the noninvasive assessment of tissue stiffness. In contrast to the well-established point-shear-wave elastography (pSWE) method acoustic radiation force impulse imaging, there is little evidence on the performance and usefulness of 2D-SWE in the assessment of liver stiffness. Thus, the aim of our study was to compare 2D-SWE versus pSWE. MATERIALS AND METHODS: 2D-SWE and pSWE were performed in 20 cirrhotic patients, 20 healthy individuals and an elasticity phantom...
January 21, 2017: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28076629/acoustic-radiation-force-impulse-arfi-elastography-compared-with-biopsy-for-evaluating-hepatic-fibrosis-after-liver-transplantation-a-cross-sectional-diagnostic-study
#20
Joel Schmillevitch, Maria Cristina Chammas, Vincenzo Pugliese, Edson Abdala, Adriana Cortez Rizzon, Venâncio Alves, Luiz Augusto Carneiro, Giovanni Cerri
CONTEXT AND OBJECTIVE: Biopsies are used after liver transplantation to evaluate fibrosis. This study aimed to evaluate the elasticity of transplanted livers by means of a non-invasive examination, acoustic radiation force imaging (ARFI) elastography, correlating the results with the histological analysis. DESIGN AND SETTING: Cross-sectional study in a public university hospital. METHODS: All patients consecutively operated between 2002 and 2010 with an indication for biopsy were evaluated by means of elastography...
November 2016: São Paulo Medical Journal, Revista Paulista de Medicina
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