keyword
https://read.qxmd.com/read/38515044/malignancy-diagnosis-of-liver-lesion-in-contrast-enhanced-ultrasound-using-an-end-to-end-method-based-on-deep-learning
#21
JOURNAL ARTICLE
Hongyu Zhou, Jianmin Ding, Yan Zhou, Yandong Wang, Lei Zhao, Cho-Chiang Shih, Jingping Xu, Jianan Wang, Ling Tong, Zhouye Chen, Qizhong Lin, Xiang Jing
BACKGROUND: Contrast-enhanced ultrasound (CEUS) is considered as an efficient tool for focal liver lesion characterization, given it allows real-time scanning and provides dynamic tissue perfusion information. An accurate diagnosis of liver lesions with CEUS requires a precise interpretation of CEUS images. However,it is a highly experience dependent task which requires amount of training and practice. To help improve the constrains, this study aims to develop an end-to-end method based on deep learning to make malignancy diagnosis of liver lesions using CEUS...
March 21, 2024: BMC Medical Imaging
https://read.qxmd.com/read/38513396/mef-unet-an-end-to-end-ultrasound-image-segmentation-algorithm-based-on-multi-scale-feature-extraction-and-fusion
#22
JOURNAL ARTICLE
Mengqi Xu, Qianting Ma, Huajie Zhang, Dexing Kong, Tieyong Zeng
Ultrasound image segmentation is a challenging task due to the complexity of lesion types, fuzzy boundaries, and low-contrast images along with the presence of noises and artifacts. To address these issues, we propose an end-to-end multi-scale feature extraction and fusion network (MEF-UNet) for the automatic segmentation of ultrasound images. Specifically, we first design a selective feature extraction encoder, including detail extraction stage and structure extraction stage, to precisely capture the edge details and overall shape features of the lesions...
March 16, 2024: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://read.qxmd.com/read/38512618/locoregional-staging-of-breast-cancer-contrast-enhanced-mammography-versus-breast-magnetic-resonance-imaging
#23
JOURNAL ARTICLE
Andrea Terzoni, Paola Basile, Anna Clelia Gambaro, Silvia Attanasio, Anna Maria Rampi, Marco Brambilla, Alessandro Carriero
PURPOSE: Breast cancer diagnosis often involves assessing the locoregional spread of the disease through MRI, as multicentricity, multifocality and/or bilaterality are increasingly common. Contrast-enhanced mammography (CEM) is emerging as a potential alternative method. This study compares the performance of CEM and MRI in preoperative staging of women with confirmed breast carcinoma. Patients were also asked to fill in a satisfaction questionnaire to rate their comfort level with each investigation...
March 21, 2024: La Radiologia Medica
https://read.qxmd.com/read/38512615/diagnostic-accuracy-of-qualitative-and-quantitative-magnetic-resonance-imaging-guided-contrast-enhanced-ultrasound-mri-guided-ceus-for-the-detection-of-prostate-cancer-a-prospective-and-multicenter-study
#24
JOURNAL ARTICLE
Yunyun Liu, Dianyuan Lu, Guang Xu, Shuai Wang, Bangguo Zhou, Ying Zhang, Beibei Ye, Lihua Xiang, Yifeng Zhang, Huixiong Xu
PURPOSE: To evaluate the diagnostic value of MRI-guided contrast-enhanced ultrasound (CEUS) for prostate cancer (PCa) diagnosis, and characteristics of PCa in qualitative and quantitative CEUS. MATERIAL AND METHODS: This prospective and multicenter study included 250 patients (133 in the training cohort, 57 in the validation cohort and 60 in the test cohort) who underwent MRI, MRI-guided CEUS and prostate biopsy between March 2021 and February 2023. MRI interpretation, qualitative and quantitative CEUS analysis were conducted...
March 21, 2024: La Radiologia Medica
https://read.qxmd.com/read/38512614/value-of-virtual-non-contrast-images-to-identify-uncomplicated-cystic-renal-lesions-photon-counting-detector-ct-vs-dual-energy-integrating-detector-ct
#25
JOURNAL ARTICLE
Stephan Rau, Alexander Rau, Thomas Stein, Muhammad Taha Hagar, Sebastian Faby, Fabian Bamberg, Jakob Weiss
PURPOSE: To investigate the value of photon-counting detector CT (PCD-CT) derived virtual non-contrast (VNC) reconstructions to identify renal cysts in comparison with conventional dual-energy integrating detector (DE EID) CT-derived VNC reconstructions. MATERIAL AND METHODS: We prospectively enrolled consecutive patients with simple renal cysts (Bosniak classification-Version 2019, density ≤ 20 HU and/or enhancement ≤ 20 HU) who underwent multiphase (non-contrast, arterial, portal venous phase) PCD-CT and for whom non-contrast and portal venous phase DE EID-CT was available...
March 21, 2024: La Radiologia Medica
https://read.qxmd.com/read/38512611/tips-and-tricks-for-a-correct-interpretation-of-contrast-enhanced-ultrasound
#26
REVIEW
Irene Campo, Antonio Granata, Lorenzo E Derchi, Gianluca Piccoli, Paolo Cassetti, Maria Assunta Cova, Michele Bertolotto
Although contrast-enhanced ultrasound (CEUS) is a widespread and easily manageable technique, image interpretation errors can occur due to the operator's inexperience and/or lack of knowledge of the frequent pitfalls, which may cause uncertain diagnosis and misdiagnosis. Indeed, knowledge of the basic physical and technical principles of ultrasound is needed both to understand sonographic image findings and to evaluate the potential and limits of the method. Like the B-mode ultrasound, the quality of the CEUS examination is also subject not only to the adequate manual skill of the operator but also to his/her deep knowledge of the technique which improves the quality of the image helping avoid misleading artifacts...
March 21, 2024: La Radiologia Medica
https://read.qxmd.com/read/38512539/deep-learning-using-contrast-enhanced-ultrasound-images-to-predict-the-nuclear-grade-of-clear-cell-renal-cell-carcinoma
#27
JOURNAL ARTICLE
Yun Bai, Zi-Chen An, Fan Li, Lian-Fang Du, Tian-Wu Xie, Xi-Peng Zhang, Ying-Yu Cai
PURPOSE: To assess the effectiveness of a deep learning model using contrastenhanced ultrasound (CEUS) images in distinguishing between low-grade (grade I and II) and high-grade (grade III and IV) clear cell renal cell carcinoma (ccRCC). METHODS: A retrospective study was conducted using CEUS images of 177 Fuhrmangraded ccRCCs (93 low-grade and 84 high-grade) from May 2017 to December 2020. A total of 6412 CEUS images were captured from the videos and normalized for subsequent analysis...
March 21, 2024: World Journal of Urology
https://read.qxmd.com/read/38510364/imaging-in-reconstructive-microsurgery%C3%A2-current-standards-and-latest-trends
#28
REVIEW
Beate Blank, Aijia Cai
In microsurgery, many different imaging techniques are available in both flap and lymphatic surgery that all come with their own advantages and disadvantages. In flap surgery, CT angiography is considered as the gold standard. Among others, Doppler ultrasound, color Doppler ultrasound, ICG, and smartphone-based thermal cameras are valuable imaging techniques. In lymphatic surgery, photoacoustic imaging, laser tomography, contrast-enhanced magnetic resonance imaging, and high frequency ultrasound stand available to surgeons next to the current standard of lymphoscintigraphy...
December 2023: Innovative Surgical Sciences
https://read.qxmd.com/read/38506945/intravenous-administration-of-ultrasound-contrast-to-critically-ill-pediatric-patients
#29
JOURNAL ARTICLE
Becky J Riggs, Santiago Martinez-Correa, Joseph Stern, Luis Octavio Tierradentro-Garcia, Sophie Haddad, Sudha Anupindi, Susan J Back, Kassa Darge, Misun Hwang
BACKGROUND: The off-label use of contrast-enhanced ultrasound has been increasingly used for pediatric patients. OBJECTIVE: The purpose of this retrospective study is to report any observed clinical changes associated with the intravenous (IV) administration of ultrasound contrast to critically ill neonates, infants, children, and adolescents. MATERIALS AND METHODS: All critically ill patients who had 1 or more contrast-enhanced ultrasound scans while being closely monitored in the neonatal, pediatric, or pediatric cardiac intensive care units were identified...
March 20, 2024: Pediatric Radiology
https://read.qxmd.com/read/38506265/multimodality-imaging-for-the-diagnosis-of-left-ventricular-apical-hypoplasia-a-case-presentation-and-review-of-the-literatures
#30
REVIEW
Shusheng Liao, Peifeng Jin, Rongrong Miao, Xinshi Huang
Left ventricular apical hypoplasia is a rare malformation recently described congenital abnormality characterized by: (1) truncation of the left ventricle, with the septum projecting toward the right ventricle; (2) abnormal papillary muscle originating from the flattened left ventricular apex; (3) a narrow right ventricle encompassing the periapical area of the left ventricle; (4) fatty infiltration of the apex of the left ventricle. We reported a case of LVAH and reviewed the patient's clinical presentation...
March 2024: Echocardiography
https://read.qxmd.com/read/38502373/-multiparametric-magnetic-resonance-imaging-for-hepatocellular-carcinoma-part%C3%A2-1-morphology-and-dynamic-perfusion-imaging-in-primary-diagnostics-and-treatment-monitoring
#31
JOURNAL ARTICLE
Mona Jahn, Günter Layer
Radiology plays a key role in the diagnosis and monitoring of hepatocellular carcinoma (HCC). Ultrasound, computed tomography (CT) and magnetic resonance imaging (MRI) are used to identify HCC lesions. Multiparametric MRI provides detailed insights into the tumor biology through the analysis of morphology, perfusion and diffusion. In this way preoperative decisions can be optimized. The guidelines recommend using contrast-enhanced MRI or ultrasound for the diagnosis of HCC. The preferred method is MRI due to its superiority in the detection of small lesions The treatment response is evaluated using modified response evaluation criteria for solid tumors (RECIST) and the European Association for the Study of the Liver (EASL) criteria...
March 19, 2024: Radiologie (Heidelb)
https://read.qxmd.com/read/38500022/development-and-validation-of-a-multi-modal-ultrasomics-model-to-predict-response-to-neoadjuvant-chemoradiotherapy-in-locally-advanced-rectal-cancer
#32
JOURNAL ARTICLE
Qiong Qin, Xiangyu Gan, Peng Lin, Jingshu Pang, Ruizhi Gao, Rong Wen, Dun Liu, Quanquan Tang, Changwen Liu, Yun He, Hong Yang, Yuquan Wu
OBJECTIVES: To assess the performance of multi-modal ultrasomics model to predict efficacy to neoadjuvant chemoradiotherapy (nCRT) in patients with locally advanced rectal cancer (LARC) and compare with the clinical model. MATERIALS AND METHODS: This study retrospectively included 106 patients with LARC who underwent total mesorectal excision after nCRT between April 2018 and April 2023 at our hospital, randomly divided into a training set of 74 and a validation set of 32 in a 7: 3 ratios...
March 18, 2024: BMC Medical Imaging
https://read.qxmd.com/read/38499954/the-differences-between-carotid-web-and-carotid-web-with-plaque-based-on-multimodal-ultrasonic-and-clinical-characteristics
#33
JOURNAL ARTICLE
Chao Hou, Shuo Li, Lei Zhang, Wei Zhang, Wen He
OBJECTIVE: This study aimed to examine the clinical and multimodal ultrasonic characteristics differences between carotid web (CW) and CW with plaque as well as the potential risk factors for stroke caused by CW. METHODS: We retrospectively enrolled patients diagnosed with CW by CTA or high-resolution MRI (HRMRI) and simultaneously underwent contrast enhanced ultrasound (CEUS) and superb microvascular imaging examinations from January 2015 to October 2022. The CW angle was measured using computer-aided software...
March 18, 2024: Insights Into Imaging
https://read.qxmd.com/read/38499727/renal-mass-imaging-modalities-does-body-mass-index-bmi-matter
#34
JOURNAL ARTICLE
Young Son, Mark E Quiring, Raeann M Dalton, Brian Thomas, Noah Davidson, Dayna DeVincentz, Collin Payne, Sahil H Parikh, Benjamin A Fink, Thomas Mueller, Gordon Brown
PURPOSE: Accurate measurement of renal mass size is crucial in the management of renal cancer. With the burdensome cost of imaging yet its need for management, a better understanding of the variability among patients when determining mass size remains of urgent importance. Current guidelines on optimal imaging are limited, especially with respect to body mass index (BMI). The aim of this study is to discern which modalities accurately measure renal mass size and whether BMI influences such accuracy...
March 18, 2024: International Urology and Nephrology
https://read.qxmd.com/read/38496696/imaging-performance-of-thoracic-smarca4-deficient-undifferentiated-tumor-a-case-report-and-literature-review
#35
Di Yang, Yong Wang
BACKGROUND: SMARCA4-deficient undifferentiated tumor (SMARCA4-UT) is a class of high-grade malignant tumors that has only been described in recent years, with an undifferentiated or rhabdoid morphology and genetic deletion of SMARCA4 ( BRG1 ), a subunit of the BRG1 -associated factors (BAFs) chromatin remodeling complex. It is a rare tumor type that occurs in young to middle-aged men and usually presents as a compressive thoracic mass with rapid progression and poor prognosis. However, much remains unknown about the clinical and imaging manifestations of the disease...
February 29, 2024: Translational Lung Cancer Research
https://read.qxmd.com/read/38495705/beyond-synthetic-aperture-focusing-deconvolution-based-elevation-resolution-enhancement-using-simulated-point-spread-function-for-linear-array-based-three-dimensional-photoacoustic-imaging
#36
JOURNAL ARTICLE
Yichuan Tang, Wojciech G Lesniak, Shang Gao, Yixuan Wu, Martin G Pomper, Haichong K Zhang
This paper introduces a deconvolution-based method to enhance the elevation resolution of a linear array-based three-dimensional (3D) photoacoustic (PA) imaging system. PA imaging combines the high contrast of optical imaging with the deep, multi-centimeter spatial resolution of ultrasound (US) imaging, providing structural and functional information about biological tissues. Linear array-based 3D PA imaging is easily accessible and applicable for ex vivo studies, small animal research, and clinical applications in humans...
March 1, 2024: Biomedical Optics Express
https://read.qxmd.com/read/38493669/effect-of-combining-evolocumab-with-statin-on-carotid-intraplaque-neovascularization-in-patients-with-premature-coronary-artery-disease-epoch
#37
JOURNAL ARTICLE
Yanyan Han, Ling Ren, Xiang Fei, Jingjing Wang, Tao Chen, Jun Guo, Qi Wang
BACKGROUND AND AIMS: We aimed to explore the effect of PCSK9 inhibitor based on the background of statin on carotid intraplaque neovascularization (IPN) assessed by serial contrast-enhanced ultrasound (CEUS) analysis in Chinese patients with premature coronary artery disease (PCAD). METHODS: 41 patients were included to receive treatments with biweekly evolocumab (n = 22) or placebo (n = 19) in addition to statin therapy for 52 weeks. All patients were newly diagnosed with PCAD and treatments were initiated at baseline of the observations...
February 13, 2024: Atherosclerosis
https://read.qxmd.com/read/38493118/nanoscale-engineering-of-gold-nanostars-for-enhanced-photoacoustic-imaging
#38
JOURNAL ARTICLE
Rui Zhang, Sven Thoröe-Boveleth, Dmitry N Chigrin, Fabian Kiessling, Twan Lammers, Roger M Pallares
Photoacoustic (PA) imaging is a diagnostic modality that combines the high contrast resolution of optical imaging with the high tissue penetration of ultrasound. While certain endogenous chromophores can be visualized via PA imaging, many diagnostic assessments require the administration of external probes. Anisotropic gold nanoparticles are particularly valued as contrast agents, since they produce strong PA signals and do not photobleach. However, the synthesis of anisotropic nanoparticles typically requires cytotoxic reagents, which can hinder their biological application...
March 16, 2024: Journal of Nanobiotechnology
https://read.qxmd.com/read/38491833/ultrasound-guided-percutaneous-high-frequency-irreversible-electroporation-in-porcine-livers-using-four-electrode-needles-a-feasibility-and-safety-study
#39
JOURNAL ARTICLE
Chang-Tian Li, Guo-Dong Zhao, Wen-Bo Zou, Zhen-Hua Zhang, Yi Zhao, Rong Liu
BACKGROUND: Malignant liver tumors seriously endanger human health. Among different therapeutic approaches, high-frequency irreversible electroporation (H-FIRE) is a recently emerging tumor ablation technique. The objective of this study was to evaluate the feasibility and safety of ultrasound-guided percutaneous H-FIRE using four electrode needles in porcine livers. METHODS: Twelve experimental pigs underwent percutaneous H-FIRE ablation using a compound steep-pulse therapeutic device...
March 2024: Cancer Medicine
https://read.qxmd.com/read/38488572/vasa-vasorum-interna-in-the-carotid-wall-of-active-forms-of-takayasu-arteritis-evidenced-by-ultrasound-localization-microscopy
#40
JOURNAL ARTICLE
Guillaume Goudot, Anatole Jimenez, Nassim Mohamedi, Jonas Sitruk, Louise Z Wang, Lina Khider, Patrick Bruneval, Emmanuel Messas, Mathieu Pernot, Tristan Mirault
Introduction: Takayasu arteritis (TA) is associated with microvascularization of the wall of large arteries and is related to inflammation. Ultrasound localization microscopy (ULM), combining ultrafast ultrasound imaging with microbubble (MB) injection, can track the path of MBs within the arterial wall and thus provide imaging of the vasa vasorum. From the analysis of MB tracks in the common carotid arteries of patients with active TA, we report the presence of microvessels in connection with the carotid lumen (i...
March 15, 2024: Vascular Medicine
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