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Contrast enhanced ultrasound testes

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https://www.readbyqxmd.com/read/28808900/varying-ultrasound-power-level-to-distinguish-surgical-instruments-and-tissue
#1
Hongliang Ren, Banani Anuraj, Pierre E Dupont
We investigate a new framework of surgical instrument detection based on power-varying ultrasound images with simple and efficient pixel-wise intensity processing. Without using complicated feature extraction methods, we identified the instrument with an estimated optimal power level and by comparing pixel values of varying transducer power level images. The proposed framework exploits the physics of ultrasound imaging system by varying the transducer power level to effectively distinguish metallic surgical instruments from tissue...
August 15, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28806319/transient-segmental-enhancement-of-pyogenic-liver-abscess-a-comparison-between-contrast-enhanced-ultrasound-and-computed-tomography
#2
Kun Sun, Wei Zhu, Yan Luo, Yongzhong Li, Xiang Zhou
OBJECTIVE: This study aimed to investigate the correlation between the transient segmental enhancement (TSE) of liver abscesses on contrast-enhanced ultrasound (CEUS) imaging and contrast-enhanced computed tomography (CT) scans. METHODS: In total, 42 abscesses in 38 patients were evaluated with real-time CEUS and contrast-enhanced CT imaging. The CT imaging and CEUS examinations were performed within one to 2 days of each other in all cases. The initial reports of the observations of TSE on CEUS scans were correlated later with the findings of TSE on contrast-enhanced CT images...
August 12, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28799124/comparison-between-free-breathing-radial-vibe-on-3-t-mri-and-endoscopic-ultrasound-for-preoperative-t-staging-of-resectable-oesophageal-cancer-with-histopathological-correlation
#3
Jinrong Qu, Hongkai Zhang, Zhaoqi Wang, Fengguang Zhang, Hui Liu, Zhidan Ding, Yin Li, Jie Ma, Zhongxian Zhang, Shouning Zhang, Yafeng Dong, Lina Jiang, Wei Zhang, Robert Grimm, Berthold Kiefer, Ihab R Kamel, Jianjun Qin, Hailiang Li
OBJECTIVES: To compare the T staging of resectable oesophageal cancer (OC) using radial VIBE (r-VIBE) and endoscopic ultrasound (EUS) with pathological confirmation of the T stage. METHODS: Forty-three patients with endoscopically proven OC and indeterminate T1/T2/T3/T4a stage by computed tomography (CT) and EUS were imaged on a 3-T magnetic resonance imaging (MRI) scanner. T stage was scored on MRI and EUS by two independent radiologists and one endoscopist, respectively, and compared with postoperative pathological findings...
August 10, 2017: European Radiology
https://www.readbyqxmd.com/read/28793871/diagnostic-accuracy-of-contrast-enhanced-ultrasound-for-characterization-of-kidney-lesions-in-patients-with-and-without-chronic-kidney-disease
#4
Emily Hueywen Chang, Wui Kheong Chong, Sandeep Kumar Kasoji, Julia Rose Fielding, Ersan Altun, Lee B Mullin, Jung In Kim, Jason Peter Fine, Paul Alexander Dayton, Wendy Kimryn Rathmell
BACKGROUND: Patients with chronic kidney disease are at increased risk of cystic kidney disease that requires imaging monitoring in many cases. However, these same patients often have contraindications to contrast-enhanced computed tomography and magnetic resonance imaging. This study evaluates the accuracy of contrast-enhanced ultrasound (CEUS), which is safe for patients with chronic kidney disease, for the characterization of kidney lesions in patients with and without chronic kidney disease...
August 9, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28783738/improvement-to-ultrasonographical-differential-diagnosis-of-gastric-lesions-the-value-of-contrast-enhanced-sonography-with-gastric-distention
#5
Tingting Li, Man Lu, Jun Song, Ping Wu, Xueqing Cheng, Zhenqi Zhang
OBJECTIVE: The purpose of this retrospective study is to evaluate the diagnostic value of contrast enhanced sonography plus gastric distention sonography, the Double Contrast-enhanced Ultrasound (DCUS) in gastric lesions. METHODS: 107 cases with pathology confirmed gastric lesions were retrospectively reviewed, DCUS and oral contrast agent ultrasound (US) were performed in all cases prior to operation. Perfusion parameters including arrival time (AT), peak intensity (PI), time to peak (TTP), and area under the curve (AUC) of the lesion and surrounding normal tissue were analyzed...
2017: PloS One
https://www.readbyqxmd.com/read/28779957/toward-a-standardization-of-ultrasound-scanners-for-dynamic-contrast-enhanced-ultrasonography-methodology-and-phantoms
#6
Stéphanie Pitre-Champagnat, Bénédicte Coiffier, Laurène Jourdain, Baya Benatsou, Ingrid Leguerney, Nathalie Lassau
The standardization of ultrasound scanners for dynamic contrast-enhanced ultrasonography (DCE-US) is mandatory for evaluation of clinical multicenter studies. We propose a robust method using a phantom for measuring the variation of the harmonic signal intensity obtained from the area under the time-intensity curve versus various contrast-agent concentrations. The slope of this measured curve is the calibration parameter. We tested our method on two devices from the same manufacturer (AplioXV and Aplio500, Toshiba, Tokyo, Japan) using the same settings as defined for a French multicenter study...
August 2, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28746202/assessing-diagnostic-value-of-contrast-enhanced-ultrasound-and-contrast-enhanced-computed-tomography-in-detecting-small-hepatocellular-carcinoma-a-meta-analysis
#7
COMPARATIVE STUDY
Jiasheng Huang, Wei Chen, Shanwen Yao
BACKGROUND: This study aimed to compare the diagnostic values of contrast-enhanced ultrasound (CEUS) and contrast-enhanced computed tomography (CECT) in detecting small hepatocellular carcinoma (SHCC). METHODS: A series of related articles from 2001 to 2015 were searched in PubMed and Embase databases. Data from selected articles were pooled to analyze the sensitivity, specificity, positive likelihood ratio (PLR), negative likelihood ratio (NLR), diagnostic odds ratio (DOR), and summary receiver operating characteristic (SROC) curve using Meta-DiSc software...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28731670/calcaneus-osteomyelitis-secondary-to-guthrie-test-case-report
#8
Tugce Tural Kara, Tugba Erat, Halil Ozdemir, Aysun Yahsi, Suat Fitoz, Ergin Ciftci, Erdal Incea
Calcaneus osteomyelitis is a rare infection in newborns. Invasive procedures, prematurity and low birth wight are some causative factors. The clinical signs may be mild. We report a neonate with calcaneous osteomyelitis which was secondary to a Guthrie test sample. She was admitted to hospital with swelling, redness and increased temperature on her heel. Superficial tissue ultrasound showed fluid collection with heavy content was observed on the posterior of the right foot. Puncture and drainage was performed and methicillin-susceptible Staphylococcus aureus was isolated from the drainage culture...
August 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28715949/contrast-enhanced-ultrasound-for-assessing-renal-perfusion-impairment-and-predicting-acute-kidney-injury-to-chronic-kidney-disease-progression
#9
Wei Cao, Shuang Cui, Li Yang, Chunyi Wu, Jian Liu, Fang Yang, Youhua Liu, Jianping Bin, Fan Fan Hou
AIMS: Acute kidney injury (AKI) is increasingly recognized as a major risk factor leading to progression to chronic kidney disease (CKD). However, the diagnostic tools for predicting AKI to CKD progression are particularly lacking. Here, we tested the utility of contrast enhanced ultrasound (CEUS) for predicting progression to CKD after AKI by using both mild (20-minute) and severe (45-minute) bilateral renal ischemia/reperfusion injury (IRI) mice. RESULTS: Renal perfusion measured by CEUS reduced to 25%±7% and 14%±6% of the pre-ischemic levels in mild and severe AKI 1 hour after ischemia (P<0...
July 17, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28704281/the-diagnostic-value-of-3-dimensional-sampling-perfection-with-application-optimized-contrasts-using-different-flip-angle-evolutions-space-mri-in-evaluating-lower-extremity-deep-venous-thrombus
#10
Gang Wu, Ruyi Xie, Xiaoli Zhang, John Morelli, Xu Yan, Xiaolei Zhu, Xiaoming Li
OBJECTIVES: The aim of this study was to evaluate the diagnostic performance of noncontrast magnetic resonance imaging utilizing sampling perfection with application optimized contrasts using different flip angle evolutions (SPACE) in detecting deep venous thrombus (DVT) of the lower extremity and evaluating clot burden. MATERIALS AND METHODS: This prospective study was approved by the institutional review board. Ninety-four consecutive patients (42 men, 52 women; age range, 14-87 years; average age, 52...
July 12, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28692968/intravascular-ultrasound-imaging-with-virtual-source-synthetic-aperture-vssa-focusing-and-coherence-factor-weighting-cfw
#11
Mingyue Yu, Yang Li, Teng Ma, K Kirk Shung, Qifa Zhou
Intravascular ultrasound (IVUS) has been frequently used for coronary artery imaging clinically. More importantly, IVUS is the fundamental image modality for most advanced multimodality intravascular imaging techniques since it provides a more comprehensive picture of vessel anatomy on which other imaging data can be superimposed. However, image quality in the deeper region is poor because of the downgraded lateral resolution and contrast-to-noise ratio. In this study, we report on the application of an ultrasound beamforming method that combines virtual source synthetic aperture (VSSA) focusing and coherence factor weighting (CFW) to improve the IVUS image quality...
July 4, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28683759/intravenous-neutralization-of-vascular-endothelial-growth-factor-reduces-vascular-function-permeability-of-the-ovary-and-prevents-development-of-ohss-like-symptoms-in-rhesus-monkeys
#12
C V Bishop, D M Lee, O D Slayden, X Li
BACKGROUND: Ovarian hyperstimulation syndrome (OHSS) is a disorder associated with elevated serum VEGFA following chorionic gonadotropin (hCG) exposure in controlled ovarian stimulation (COS) cycles in women. In this study, we tested the effect of intravenous VEGFA neutralization on OHSS-like symptoms and vascular function in rhesus macaques during COS cycles. METHODS: Monkeys (n = 8) were treated with 3 COS protocols and assigned randomly to groups as follows: 1) COS alone (Control, n = 5); 2) COS + VEGF mAb Avastin 19 ± 5 h before hCG (Avastin pre-hCG; n = 6); 3) COS + Avastin 3-4 days post-hCG (Avastin post-hCG; n = 4); 4) COS + Simulated Early Pregnancy (SEP n = 3); or 5) COS + SEP + Avastin (SEP + Avastin n = 3)...
July 6, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/28662928/surveillance-after-endovascular-aortic-repair
#13
Feras Zaiem, Jehad Almasri, Mouaffaa Tello, Larry J Prokop, Elliot L Chaikof, Mohammad Hassan Murad
OBJECTIVE: The objective of this systematic review and meta-analysis was to evaluate the optimal modality and frequency of surveillance after endovascular aortic repair (EVAR) in adult patients with abdominal aortic aneurysms. METHODS: We searched for studies of post-EVAR surveillance in MEDLINE In-Process & Other Non-Indexed Citations, MEDLINE, Embase, Cochrane Database of Systematic Reviews, and Scopus through May 10, 2016. The outcomes of interest were endoleaks, mortality, limb ischemia, renal complications, late rupture, and aneurysm-related mortality...
June 26, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28660688/use-of-contrast-enhanced-ultrasound-for-confirmation-of-central-venous-catheter-placement-systematic-review-and-meta-analysis
#14
Ralph Bou Chebl, Shafeek Kiblawi, Christopher El Khuri, Nadine El Hajj, Rana Bachir, Roni Aoun, Gilbert Abou Dagher
OBJECTIVES: The purpose of this meta-analysis was to determine the sensitivity, specificity, and positive and negative predictive values of contrast-enhanced ultrasound (US) for confirming the tip location and placement of central venous catheters in adult patients. METHODS: A systematic review was performed using electronic databases, including MEDLINE, ClinicalTrials.gov, Cochrane, Embase, PubMed, and Scopus. Inclusion criteria were studies conducted on adult patients receiving an internal jugular or a subclavian central venous catheter in the emergency department or intensive care unit...
June 29, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28658877/bilateral-testicular-metastases-from-occult-primary-prostate-cancer-in-a-young-adult-a-rare-case-report
#15
Vijaya Rajesh Kamble, Purva Mahesh Agrawal
Testicular metastases are detected incidentally in upto 4% cases after orchiectomy for Prostate Carcinoma (PCa). Most of the secondaries to testes are due to PCa, only few patients have clinically manifested metastases to bilateral testes. Metastases to bilateral testis is unusual while unilateral involvement of the testis is seen usually. We report a case of primary PCa with bilateral testicular metastases which presented with palpable mass in the right testis. A 43-year-old male patient presented with two-month history of swelling in right inguino-scrotal region...
May 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28646603/comparison-of-oral-contrast-enhanced-transabdominal-ultrasound-imaging-with-transverse-contrast-enhanced-computed-tomography-in-preoperative-tumor-staging-of-advanced-gastric-carcinoma
#16
Xuemei He, Jing Sun, Xiaoling Huang, Chun Zeng, Yinggang Ge, Jun Zhang, Jingxian Wu
OBJECTIVES: This study assessed the diagnostic performance of transabdominal oral contrast-enhanced ultrasound (US) imaging for preoperative tumor staging of advanced gastric carcinoma by comparing it with transverse contrast-enhanced computed tomography (CT). METHODS: This retrospective study included 42 patients with advanced gastric cancer who underwent laparoscopy, radical surgery, or palliative surgery because of serious complications and had a body mass index of less than 25 kg/m(2) ...
June 24, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28643532/dermatomyositis-with-renal-infarction-a-case-report-and-literature-review
#17
Ti Zhang, Xin Liu, Huji Xu
Renal infarction is a rare clinical entity that is not easily detected by low-sensitivity ultrasound. We herein report a case of dermatomyositis with renal infarction detected during corticosteroid therapy. The patient was followed up for 18 months. A woman who was clinically diagnosed with dermatomyositis complained of severe pain in the right flank of the low back and abdomen, accompanied by nausea and vomiting during corticosteroid therapy. Based on the findings of routine blood tests, abdominal X-ray radiography, and abdominal ultrasound, the patient was diagnosed with acute gastroenteritis and treated with levofloxacin...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28620930/prospective-multimodal-imaging-assessment-of-locally-advanced-cervical-cancer-patients-administered-by-chemoradiation-followed-by-radical-surgery-the-price-prospective-imaging-of-cervical-cancer-and-neoadjuvant-treatment-study-the-role-of-ultrasound
#18
A C Testa, G Ferrandina, F Moro, T Pasciuto, M C Moruzzi, I De Blasis, F Mascilini, E Foti, R Autorino, A Collarino, B Gui, G F Zannoni, M A Gambacorta, A L Valentini, V Rufini, G Scambia
OBJECTIVE: Chemoradiation-based neoadjuvant treatment followed by radical surgery is an alternative therapeutic strategy for locally advanced cervical cancer (LACC) -stage ≥ IB2 (except of IIA1)- but ultrasound variables used to predict neoadjuvant partial response are not well defined. The goal of this study was to prospectively analyze the potential role of transvaginal ultrasound (TVUS) in early predicting pathologically assessed residual disease in a large, single-institution series of LACC patients triaged to neoadjuvant treatment followed by radical surgery...
June 16, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28598495/ultrasonography-for-endoleak-detection-after-endoluminal-abdominal-aortic-aneurysm-repair
#19
REVIEW
Iosief Abraha, Maria Laura Luchetta, Rita De Florio, Francesco Cozzolino, Giovanni Casazza, Piergiorgio Duca, Basso Parente, Massimiliano Orso, Antonella Germani, Paolo Eusebi, Alessandro Montedori
BACKGROUND: People with abdominal aortic aneurysm who receive endovascular aneurysm repair (EVAR) need lifetime surveillance to detect potential endoleaks. Endoleak is defined as persistent blood flow within the aneurysm sac following EVAR. Computed tomography (CT) angiography is considered the reference standard for endoleak surveillance. Colour duplex ultrasound (CDUS) and contrast-enhanced CDUS (CE-CDUS) are less invasive but considered less accurate than CT. OBJECTIVES: To determine the diagnostic accuracy of colour duplex ultrasound (CDUS) and contrast-enhanced-colour duplex ultrasound (CE-CDUS) in terms of sensitivity and specificity for endoleak detection after endoluminal abdominal aortic aneurysm repair (EVAR)...
June 9, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28597000/intraoperative-ultrasound-as-a-screening-modality-for-the-detection-of-liver-metastases-during-resection-of-primary-colorectal-cancer-a-systematic-review
#20
REVIEW
Signe Bremholm Ellebæk, Claus Wilki Fristrup, Michael Bau Mortensen
Colorectal cancer (CRC) is one of the most common cancer diseases worldwide. One in 4 patients with CRC will have a disseminated disease at the time of diagnosis and often in the form of synchronous liver metastases. Studies suggest that up to 30% of patients have non-recognized hepatic metastases during primary surgery for CRC. Intraoperative ultrasonography examination (IOUS) of the liver to detect liver metastases was considered the gold standard during open CRC surgery. Today laparoscopic surgery is the standard procedure, but laparoscopic ultrasound examination (LUS) is not performed routinely...
April 2017: Ultrasound International Open
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