8,956 results match your criteria b-mode ultrasound

A New Insight on Exophytic Serous Borderline Adnexal Tumors: Specific Sonographic Features.

J Ultrasound Med 2021 Sep 25. Epub 2021 Sep 25.

Obstetrics and Gynecology Ultrasound Unit, Bnai-Zion Medical Center, Haifa, Israel.

Objectives: To characterize and compare the sonographic features of exophytic serous borderline ovarian tumors (ESBOT) with those of high-grade serous carcinoma of the ovary (HGSC).

Methods: Seven patients with histological diagnosis of ESBOT diagnosed between 2011 and 2019 and 10 consecutive cases of HGSC detected during 2019, both depicting an exophytic growth pattern, were identified retrospectively. The sonographic imaging of the masses was reassessed and characterized according to the International Ovarian Tumor Analysis terms. Read More

View Article and Full-Text PDF
September 2021

Artificial intelligence system reduces false-positive findings in the interpretation of breast ultrasound exams.

Nat Commun 2021 Sep 24;12(1):5645. Epub 2021 Sep 24.

Center for Data Science, New York University, New York, NY, USA.

Though consistently shown to detect mammographically occult cancers, breast ultrasound has been noted to have high false-positive rates. In this work, we present an AI system that achieves radiologist-level accuracy in identifying breast cancer in ultrasound images. Developed on 288,767 exams, consisting of 5,442,907 B-mode and Color Doppler images, the AI achieves an area under the receiver operating characteristic curve (AUROC) of 0. Read More

View Article and Full-Text PDF
September 2021

Preoperative Prediction of Microvascular Invasion in Patients With Hepatocellular Carcinoma Based on Radiomics Nomogram Using Contrast-Enhanced Ultrasound.

Front Oncol 2021 7;11:709339. Epub 2021 Sep 7.

Department of Internal Medicine, Hirslanden Clinic, Bern, Switzerland.

Purpose: This study aimed to develop a radiomics nomogram based on contrast-enhanced ultrasound (CEUS) for preoperatively assessing microvascular invasion (MVI) in hepatocellular carcinoma (HCC) patients.

Methods: A retrospective dataset of 313 HCC patients who underwent CEUS between September 20, 2016 and March 20, 2020 was enrolled in our study. The study population was randomly grouped as a primary dataset of 192 patients and a validation dataset of 121 patients. Read More

View Article and Full-Text PDF
September 2021

The crested caracara (Caracara plancus) eye: Morphologic observations and results of selected diagnostic tests.

Vet Ophthalmol 2021 Sep 23. Epub 2021 Sep 23.

Veterinary Medicine Department, Comparative Ophthalmology Laboratory, Federal University of Paraná (UFPR), Curitiba, Brazil.

Purpose: To provide a descriptive investigation about relevant features of the crested caracara's eye (Caracara plancus) and bony orbit, as well as provide data for ophthalmic tests.

Methods: Morphological observations and the following diagnostic tests were performed: Schirmer tear test (STT), conjunctival flora evaluation, corneal touch threshold (CTT), intraocular pressure (IOP), central corneal thickness (CCT), B-mode ocular biometry, palpebral fissure length (PFL), and corneal diameter (CD) in 19 healthy birds, plus two macerated skulls. Not all birds were used for each test. Read More

View Article and Full-Text PDF
September 2021

Predicting the surgical reparability of large-to-massive rotator cuff tears by B-mode ultrasonography: a cross-sectional study.

Ultrasonography 2021 Jun 6. Epub 2021 Jun 6.

Department of Orthopedic Surgery, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan.

Purpose: This study aimed to compare the ability of B-mode ultrasonography and magnetic resonance imaging (MRI) to predict the repairability of large-to-massive rotator cuff tears (RCTs).

Methods: This cross-sectional study included participants with large-to-massive RCTs who underwent arthroscopic repair. B-mode ultrasonography and MRI were conducted prior to arthroscopic repair. Read More

View Article and Full-Text PDF

Cross-sectional and longitudinal associations between subcutaneous adipose tissue thickness and dual-energy X-ray absorptiometry fat mass.

Clin Physiol Funct Imaging 2021 Sep 22. Epub 2021 Sep 22.

Energy Balance and Body Composition Laboratory, Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, Texas, USA.

The present study examined cross-sectional and longitudinal relationships between total and segmental subcutaneous tissue thicknesses from ultrasonography (US) and total and segmental fat mass (FM) estimates from dual-energy X-ray absorptiometry (DXA). Traditional US FM estimates were also examined. Twenty resistance-trained males (mean ± SD; age: 22. Read More

View Article and Full-Text PDF
September 2021

B-mode ultrasound and ecobiometric parameters to assess embryonic and fetal development and estimate gestational age in goats.

Theriogenology 2021 Sep 4;175:123-133. Epub 2021 Sep 4.

Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.

The aim of this study was to monitor maternal-fetal ecobiometric parameters during physiological pregnancy in goats using ultrasound to predict gestational age by establishing mathematical equations. Twenty-five Saanen goats were included in the study. Assessments were performed weekly from the 21 day of pregnancy until parturition. Read More

View Article and Full-Text PDF
September 2021

Contrast-enhanced ultrasound imaging for intestinal lymphoma.

World J Gastroenterol 2021 Aug;27(32):5438-5447

Department of Ultrasound, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China.

Background: Intestinal lymphoma is a rare tumor. Contrast-enhanced ultrasound (CEUS) findings of intestinal lymphoma have not been reported previously, and the relationship between CEUS and clinicopathological features and prognostic factors is still unknown.

Aim: To describe the B-mode US and CEUS features of intestinal lymphoma and investigate the correlation of CEUS and histopathological features. Read More

View Article and Full-Text PDF

Investigation of Genes Associated With Atherosclerosis in Patients With Systemic Lupus Erythematosus.

Arch Rheumatol 2021 Jun 27;36(2):287-295. Epub 2021 Jan 27.

Department of Medical Genetics, Trakya University, Faculty of Medicine, Edirne, Turkey.

Objectives: In this study, we aimed to identify patients with systemic lupus erythematosus (SLE) who are genetically at risk for developing atherosclerosis.

Patients And Methods: Between November 2014 and May 2016, a total of 38 patients with SLE (36 females, 2 males; mean age: 37.6 years; range, 18 to 71 years) and 32 healthy females (mean age: 31. Read More

View Article and Full-Text PDF

Intima-Media Thickness Measurements of the Common Carotid Artery in Patients with Central Serous Chorioretinopathy: A Case-Control Study.

J Ophthalmol 2021 4;2021:6652373. Epub 2021 Sep 4.

Isfahan Eye Research Center, Department of Ophthalmology, Isfahan University of Medical Sciences, Isfahan, Iran.

Purpose: To evaluate the intima-media thickness (IMT) of the left and right common carotid arteries (CCA) as an indicator of subclinical atherosclerosis in patients with central serous chorioretinopathy (CSCR).

Methods: This was a case-control study involving patients with CSCR and a matched healthy control group. The mean and difference of the left and right CCA IMT were determined and compared between the two groups using carotid duplex high-resolution B-mode ultrasound equipment. Read More

View Article and Full-Text PDF
September 2021

Effects of sub-atmospheric pressure and dissolved oxygen concentration on lesions generated in ex vivo tissues by high intensity focused ultrasound.

Biomed Eng Online 2021 Sep 15;20(1):91. Epub 2021 Sep 15.

State Key Laboratory of Ultrasound in Medicine and Engineering, College of Biomedical Engineering, Chongqing Medical University, Chongqing, 400016, China.

Background: Acoustic cavitation plays an important role in the medical treatment using high-intensity focused ultrasound (HIFU), but unnecessarily strong cavitation also could deform the morphology and enlarge the size of lesions. It is known that the increase of ambient hydrostatic pressure (P) can control the acoustic cavitation. But the question of how the decrease of P and dissolved oxygen concentration (DOC) influence the strength of cavitation has not been thoroughly answered. Read More

View Article and Full-Text PDF
September 2021

Association between a family history of diabetes and carotid artery atherosclerosis in Korean adults.

Epidemiol Health 2021 3;43:e2021049. Epub 2021 Aug 3.

Department of Public Health, Graduate School, Yonsei University, Seoul, Korea.

Objectives: Diabetes is a well-known risk factor for atherosclerosis, but the association between a family history of diabetes and atherosclerosis remains unknown. In this study, we assessed the association between a family history of diabetes and increased carotid intima-media thickness (IMT), a marker of subclinical atherosclerosis, in a middle-aged Korean population.

Methods: This cross-sectional study included 3,974 community-dwelling adults (1,404 male and 2,570 female) aged 30-64 years from the Cardiovascular and Metabolic Diseases Etiology Research Center cohort. Read More

View Article and Full-Text PDF
September 2021

Role of "Stiff Rim" sign obtained by shear wave elastography in diagnosis and guiding therapy of breast cancer.

Int J Med Sci 2021 28;18(15):3615-3623. Epub 2021 Aug 28.

Department of Ultrasound in Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Institute of Ultrasound in Medicine, Shanghai 200233, P.R, China.

Because the halo around the tumor in shear wave elastography (SWE) is defined as the "stiff rim" sign, the diagnosis of breast lesions with the stiff rim sign is popular. However, only a few studies have described the stiff rim sign quantitatively. This study aimed to investigate the usefulness of the stiff rim sign in the diagnosis and tumor, node, metastasis stage of breast cancer. Read More

View Article and Full-Text PDF

A CNN-based method to reconstruct 3-D spine surfaces from US images in vivo.

Med Image Anal 2021 Sep 1;74:102221. Epub 2021 Sep 1.

Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843, USA. Electronic address:

Three-dimensional (3-D) reconstruction of the spine surface is of strong clinical relevance for the diagnosis and prognosis of spine disorders and intra-operative image guidance. In this paper, we report a new technique to reconstruct lumbar spine surfaces in 3-D from non-invasive ultrasound (US) images acquired in free-hand mode. US images randomly sampled from in vivo scans of 9 rabbits were used to train a U-net convolutional neural network (CNN). Read More

View Article and Full-Text PDF
September 2021

Microvascular imaging ultrasound (MicroV) and power Doppler vascularization analysis in a pediatric population with early scrotal pain onset.

Jpn J Radiol 2021 Sep 13. Epub 2021 Sep 13.

Department of Biomedical and Dental Sciences and of Morphofunctional Imaging, University of Messina, AOU Policlinico Universitario "G. Martino", Via Consolare Valeria 1, 98122, Messina, Italy.

Introduction: The power Doppler is a useful tool in the evaluation of pediatric acute scrotal pain. Nonetheless, it may have some inherent limitations in scrotal vascularization analysis, potentially causing unnecessary surgery. The microvascular imaging ultrasound (MicroV) is an innovative Doppler technique able to improve the detection of very low flow. Read More

View Article and Full-Text PDF
September 2021

Ultrasound Molecular Imaging for the Guidance of Ultrasound-Triggered Release of Liposomal Doxorubicin and Its Treatment Monitoring in an Orthotopic Prostatic Tumor Model in Rat.

Ultrasound Med Biol 2021 Sep 6. Epub 2021 Sep 6.

LabTAU, INSERM, Centre Léon Bérard, Université Lyon 1, Univ Lyon, F-69003, Lyon, France; FUS Foundation, Charlottesville, Virginia, USA; Department of Radiology, University of Virginia School of Medicine, Charlottesville, Virginia, USA.

Liposome encapsulation of drugs is an interesting approach in cancer therapy to specifically release the encapsulated drug at the desired treatment site. In addition to thermo-, pH-, light-, enzyme- or redox-responsive liposomes, which have had promising results in (pre-) clinical studies, ultrasound-triggered sonosensitive liposomes represent an exciting alternative to locally trigger the release from these cargos. Localized drug release requires precise tumor visualization to produce a targeted and ultrasound stimulus. Read More

View Article and Full-Text PDF
September 2021

Switchable and Tunable Deep Beamformer using Adaptive Instance Normalization for Medical Ultrasound.

IEEE Trans Med Imaging 2021 Sep 9;PP. Epub 2021 Sep 9.

Recent proposals of deep learning-based beamformers for ultrasound imaging (US) have attracted significant attention as computational efficient alternatives to adaptive and compressive beamformers. Moreover, deep beamformers are versatile in that image post-processing algorithms can be readily combined. Unfortunately, with the existing technology, a large number of beamformers need to be trained and stored for different probes, organs, depth ranges, operating frequency, and desired target 'styles', demanding significant resources such as training data, etc. Read More

View Article and Full-Text PDF
September 2021

Quantitative ultrasound imaging of soft biological tissues: a primer for radiologists and medical physicists.

Insights Imaging 2021 Sep 9;12(1):127. Epub 2021 Sep 9.

Department of Radiology, Radio-oncology, and Nuclear Medicine, Université de Montréal, Montréal, Québec, Canada.

Quantitative ultrasound (QUS) aims at quantifying interactions between ultrasound and biological tissues. QUS techniques extract fundamental physical properties of tissues based on interactions between ultrasound waves and tissue microstructure. These techniques provide quantitative information on sub-resolution properties that are not visible on grayscale (B-mode) imaging. Read More

View Article and Full-Text PDF
September 2021

Glycerol-in-SEBS gel as a material to manufacture stable wall-less vascular phantom for ultrasound and photoacoustic imaging.

Biomed Phys Eng Express 2021 Sep 20;7(6). Epub 2021 Sep 20.

Departamento de Física, FFCLRP, Universidade de São Paulo, Ribeirão Preto, Brazil.

Styrene-ethylene/butylene-styrene (SEBS) copolymer-in-mineral oil gel is an appropriate tissue-mimicking material to manufacture stable phantoms for ultrasound and photoacoustic imaging. Glycerol dispersion has been proposed to further tune the acoustic properties and to incorporate hydrophilic additives into SEBS gel. However, this type of material has not been investigated to produce wall-less vascular flow phantom for these imaging modalities. Read More

View Article and Full-Text PDF
September 2021

Arterial Hypertension and Serum Uric Acid in Elderly- SEPHAR III Study.

Arq Bras Cardiol 2021 08;117(2):378-384

University of Medicine and Pharmacy Victor Babes Timisoara - Department of Internal Medicine, Timisoara - Romênia.

Background: Hyperuricemia is a frequent finding in patients with arterial hypertension, and there is increasing evidence that this entity is also a risk factor for cardiovascular disease.

Objective: In the context of an aging population, this study aims to evaluate serum uric acid levels and arterial hypertension prevalence and control in a subgroup of Romanian adults (>65 years), concerning the influence of age on these parameters.

Method: The study sample consists of 1,920 adults included in SEPHAR III survey, of whom 447 were elderly patients (>65 years of age). Read More

View Article and Full-Text PDF

Evaluation of rehabilitation exercise effects by using gradation-based skeletal muscle echo intensity in older individuals: a one-group before-and-after trial study.

BMC Geriatr 2021 09 6;21(1):485. Epub 2021 Sep 6.

Research Center of Health, Physical Fitness & Sports, Nagoya University, Nagoya, Aichi, Japan.

Background: Higher muscle echo intensity (EI) reflects higher content of fat and/or connective tissue within skeletal muscle, eventually inducing lower muscle strength, physical dysfunction, and metabolic impairment. Continuous exercise decreases muscle EI in older individuals; however, it is not well understood how several months' rehabilitation exercise affects gradation-based EI. The purpose of this study was to investigate the effects of 6 months of rehabilitation exercise on gradation-based higher and lower EI in older men and women. Read More

View Article and Full-Text PDF
September 2021

The effect of a double dose of cloprostenol sodium on luteal blood flow and pregnancy rates per artificial insemination in lactating dairy cows.

J Dairy Sci 2021 Sep 2. Epub 2021 Sep 2.

Department of Animal Science, Michigan State University, East Lansing 48824. Electronic address:

Inadequate luteolysis in fertility programs is a problem for lactating dairy cows treated with a single dose of PGF. The proportion of cows with complete luteolysis can be increased by administering 2 doses of PGF 24 h apart. This study hypothesized that a double dose of cloprostenol sodium (1. Read More

View Article and Full-Text PDF
September 2021

The Value of Lung Ultrasound to Detect the Early Pleural and Pulmonary Pathologies in Nonhospitalized COVID-19-Suspected Cases in a Population with a Low Prevalence of COVID-19 Infection: A Prospective Study in 297 Subjects.

J Ultrasound Med 2021 Sep 4. Epub 2021 Sep 4.

Interdisciplinary Center of Ultrasound Diagnostics, University Hospital Giessen and Marburg, Philipps University Marburg, Marburg, Germany.

Objectives: This prospective study aimed to evaluate the value of B-mode lung ultrasound (LUS) for the early diagnosis of coronavirus disease 2019 (COVID-19) infection in nonhospitalized COVID-19 suspected cases in a population with a low prevalence of disease.

Methods: From April 2020 to June 2020, in an ambulatory testing center for COVID-19-suspected cases, 297 subjects were examined by LUS before a nasopharyngeal swab was taken for a reverse transcription polymerase chain reaction (RT-PCR) test. The following LUS findings were defined as pathological ultrasound findings and were analyzed: the presence of 1) pleural effusion, 2) B-lines, 3) fragmented visceral pleura, 4) consolidation, and 5) air bronchogram in the consolidation. Read More

View Article and Full-Text PDF
September 2021

Endothelial progenitor cells predict vascular damage progression in naive hypertensive patients according to sex.

Hypertens Res 2021 Sep 1. Epub 2021 Sep 1.

Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Catanzaro, Italy.

Low levels of endothelial progenitor cells (EPCs) are associated with cardiovascular (CV) morbidity and mortality. Early indicators of vascular damage represent independent predictors of CV prognosis. The aim of this study was to evaluate the possible association of EPCs and circulating cytokine levels with vascular damage markers in naive hypertensive patients according to sex and to evaluate the role of EPCs in vascular damage progression. Read More

View Article and Full-Text PDF
September 2021

Retrospective analysis (2009-2017) of factors associated with progression and regression of non-alcoholic fatty liver disease (Hepatic steatosis) in patients with type 2 diabetes seen at a tertiary diabetes centre in Southern India.

Diabetes Metab Syndr 2021 Aug 25;15(5):102261. Epub 2021 Aug 25.

Dr. Mohan's Diabetes Specialties Centre, Chennai, India. Electronic address:

Aim: To identify the profiles and factors associated with progression/regression of ultrasound-derived hepatic steatosis with type 2 diabetes mellitus seen at a tertiary diabetes center in southern India.

Methods: Participants were individuals with type 2 diabetes mellitus with at least two consecutive ultrasound measurements available. Hepatic steatosis was assessed using high-resolution B-mode ultrasonography. Read More

View Article and Full-Text PDF

Relation between carotid intimal medial thickness and left ventricular mass and left ventricular mass indices in maintenance hemodialysis patients.

Ther Apher Dial 2021 Aug 30. Epub 2021 Aug 30.

Department of Internal Medicine, Mansoura Nephrology and Dialysis Unit (MNDU), Mansoura Faculty of Medicine, Mansoura, Egypt.

Left ventricular hypertrophy (LVH) is a risk factor of cardiovascular morbidity in dialysis patients. The association between LV mass and carotid intimal medial thickness (CIMT) could be due to increased hemodynamic load in dialysis patients. The relationship between CIMT and LVM indices in hemodialysis (HD) patients was investigated. Read More

View Article and Full-Text PDF

Utility of B-Mode, Color Doppler and Elastography in the Diagnosis of Breast Cancer: Results of the CD-CONFIRM Multicenter Study of 1351 Breast Solid Masses.

Ultrasound Med Biol 2021 Aug 26. Epub 2021 Aug 26.

Department of Breast Surgery, National Hospital Organization Nagoya Medical Center, Nagoya City, Aichi, Japan.

The usefulness of color Doppler ultrasound (CD) in distinguishing between benign and malignant breast lesions remains controversial. Our prior study, the Japan Association of Breast and Thyroid Sonology (JABTS) BC-04 study (malignant: 839, benign: 569), found CD was useful in breast cancer diagnosis, and we developed CD diagnostic criteria. The first aim of the current study (the CD-CONFIRM study) was to evaluate the usefulness of the CD diagnostic criteria. Read More

View Article and Full-Text PDF

Noninvasive, quantitative evaluation of hepatic steatosis of donor livers by reference frequency method: A preliminary study.

Eur J Radiol 2021 Aug 16;143:109909. Epub 2021 Aug 16.

Department of Radiology, Mayo Clinic, Rochester, MN, USA.

Purpose: Evaluating degree of hepatic steatosis is of great value for prognosis of liver transplantation. There is an urgent need for a non-invasive method to assess hepatic steatosis grade of donor livers. Purpose of our study was to evaluate diagnostic accuracy of attenuation coefficient estimation (ACE) by reference frequency method (RFM) in detecting hepatic steatosis of donor livers. Read More

View Article and Full-Text PDF

Pathological findings of liver steatosis that is difficult to evaluate with ultrasound.

J Med Ultrason (2001) 2021 Aug 28. Epub 2021 Aug 28.

Department of Pathology, Kurume University School of Medicine, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan.

Although new ultrasound (US) methods able to quantitatively assess liver fat content have been recently developed, B-mode US is still the major method for detecting liver steatosis during medical checkups. However, some pathological cases yield false-positive or false-negative liver steatosis results using B-mode US. In addition, histologically, the degree of fat deposits and the size of fat droplets in the liver can affect the sensitivity and specificity of the diagnosis of liver steatosis using B-mode US. Read More

View Article and Full-Text PDF

Quantitative assessment of fatty liver using ultrasound attenuation imaging.

Dong Ho Lee

J Med Ultrason (2001) 2021 Aug 27. Epub 2021 Aug 27.

Department of Radiology, Seoul National University Hospital, 101 Daehangno, Jongno-gu, Seoul, 110-744, South Korea.

Non-alcoholic fatty liver disease (NAFLD) is the most common cause of chronic liver disease, with an incidence of 20-40% worldwide, making it a major healthcare problem. Because NAFLD can progress to liver fibrosis and cirrhosis through non-alcoholic steatohepatitis, early detection and monitoring of hepatic steatosis are essential for management of NAFLD patients. Even though conventional B-mode ultrasound (US) has been widely used for the evaluation of NAFLD owing to its safety and easy accessibility, its subjective nature and limited accuracy in detecting mild steatosis are major limitations. Read More

View Article and Full-Text PDF