Results 21 to 30 of about 115,685 (159)

Application of additive manufacturing for the adaptive design of ultrasound phantoms

Frontiers in Physics
IntroductionThe image formation process of conventional pulse-echo Ultrasound mainly uses the backscattered amplitude and assumes constant attenuation and speed of sound in the penetrated media.
Lukas Zalka, Lukas Zalka, Johannes Köhrer, Johannes Köhrer, Chatsuda Songsaeng, Chatsuda Songsaeng, Peter Homolka, Christian Kollmann, Johann Hummel, Johann Hummel, Michael Figl, Michael Figl   +11 more
doaj   +1 more source

A phantom study on the applicability of a detectability index in ultrasound imaging

Frontiers in Physics
The assessment of clinical image quality on ultrasound is currently often subjective. While image quality factors such as contrast response or depth of penetration can be evaluated semi-automatically, the evaluation of high contrast resolution requires ...
Chatsuda Songsaeng, Chatsuda Songsaeng, Johannes Köhrer, Johannes Köhrer, Markus Ortner, Lukas Zalka, Lukas Zalka, Elisabeth Salomon, Sten Huber, Peter Homolka, Christian Kollmann, Michael Figl, Michael Figl, Johann Hummel, Johann Hummel, Johann Hummel   +15 more
doaj   +1 more source

Role of Color Doppler Ultrasound in Predicting Malignancy in Cervical Lymph Nodes [PDF]

International Journal of Anatomy Radiology and Surgery, 2016
Introduction: Cervical lymphadenopathy is a common finding in clinical practice. There are various causes, which can be broadly divided into benign and malignant.
Kanika Gupta, Tushar Chandra, Bhuvaneswari Venkatesan, Payal Tripathi   +3 more
doaj   +1 more source

Comparison of clinical tests and doppler ultrasound in the preoperative assessment of lower extremity varicose veins

Indian Journal of Vascular and Endovascular Surgery, 2017
Introduction: Varicose vein of the lower extremity is a very common problem and is associated with severe morbidity if left untreated. Recurrence is inevitable if preoperative assessment of incompetence is not accurate.
M Ajoo Anto Prabhu, K G Natarajan, S Robinson Smile   +2 more
doaj   +1 more source

Using a DAS28-CRP-steered treat-to-target strategy does not eliminate subclinical inflammation as assessed by ultrasonography in rheumatoid arthritis patients in longstanding clinical remission

Arthritis Research & Therapy, 2021
Background Subclinical synovitis by ultrasound is a frequent finding in rheumatoid arthritis (RA) patients in remission and has been shown to be related to erosive progression, risk of flare and unsuccessful drug tapering, but it has not been ...
Lene Terslev, Cecilie Heegaard Brahe, Mikkel Østergaard, Viktoria Fana, Mads Ammitzbøll-Danielsen, Torsten Møller, Simon Krabbe, Merete Lund Hetland, Uffe Møller Døhn   +8 more
doaj   +1 more source

DOPPLER ULTRASOUND OF ORBITAL VESSELS [PDF]

Australian and New Zealand Journal of Ophthalmology, 1988
AbstractThe techniques of doppler ultrasound have been applied to blood vessels within the orbit. The doppler frequency shifts of ultrasonic pulses scattered from blood cells moving within orbital vessels are a measure of velocities rather than the amount of blood flow.
C R, Canning, M, Restori
openaire   +2 more sources

Efficacy of color Doppler ultrasound and contrast-enhanced ultrasound in identifying vascular invasion in pancreatic ductal adenocarcinoma

Insights into Imaging
Objectives To compare color Doppler ultrasound and contrast-enhanced ultrasound (CEUS) in evaluating vascular invasion in pancreatic ductal adenocarcinoma (PDAC).
Wan-Ying Jia, Yang Gui, Xue-Qi Chen, Li Tan, Jing Zhang, Meng-Su Xiao, Xiao-Yan Chang, Meng-Hua Dai, Jun-Chao Guo, Yue-Juan Cheng, Xiang Wang, Jia-Hui Zhang, Xiao-Qian Zhang, Ke Lv   +13 more
doaj   +1 more source

Can contrast-enhanced ultrasound with second-generation contrast agents replace computed tomography angiography for distinguishing between occlusion and pseudo-occlusion of the internal carotid artery?

Clinics
OBJECTIVE: The purpose of this study was to evaluate the effectiveness of contrast-enhanced ultrasound with a second-generation contrast agent in distinguishing between occlusion and pseudo-occlusion of the cervical internal carotid artery, comparing it ...
Carlos Augusto Pinto Ventura, Erasmo Simão da Silva, Giovanni Guido Cerri, Pedro Puech Leão, Adriano Tachibana, Maria Cristina Chammas   +5 more
doaj   +1 more source

Non-contrast ultrasound assessment of blood flow in clinical practice

Journal of Ultrasonography
Since the first clinical use of ultrasound in the 1940s, significant advancements have been made in its applications. Color Doppler imaging and power Doppler imaging are considered the first and second generations of flow ultrasound assessment tools ...
Babington Emmanuel Abiola, Amedu Cletus, Anyasor Ebuka, Reeve Ruth   +3 more
doaj   +1 more source

Doppler ultrasound evaluation in preeclampsia [PDF]

BMC Research Notes, 2013
Abstract Background Worldwide preeclampsia (PE) is the leading cause of maternal death and affects 5 to 8% of pregnant women. PE is characterized by elevated blood pressure and proteinuria. Doppler Ultrasound (US) evaluation has been considered a useful method for prediction of PE; however, there is no complete data ...
Maria A Lopez-Mendez, Victoria Martínez-Gaytán, Raúl Cortés-Flores, René Ramos-González, Mauro Ochoa-Torres, Idalia Garza‐Veloz, Mónica Martínez-Acuña, Jose Isaias Badillo-Almaraz, Margarita L. Martínez‐Fierro   +8 more
openaire   +2 more sources