Results 51 to 60 of about 112,051 (147)

Reverse Doppler effect in backward spin waves scattered on acoustic waves

, 2009
We report on the observation of reverse Doppler effect in backward spin waves reflected off of surface acoustic waves. The spin waves are excited in a yttrium iron garnet (YIG) film. Simultaneously, acoustic waves are also generated.
A. A. Serga, A. Jander, A. V. Chumak, B. Hillebrands, C. Doppler, C. H. Papas, D. D. Stancil, P. Dhagat, S. Hanna, V. E. Pafomov, V. G. Veselago, V. G. Veselago, Yu. V. Gulyaev   +12 more
core   +1 more source

Single-color two-photon spectroscopy of Rydberg states in electric fields [PDF]

, 2014
Rydberg states of atomic helium with principal quantum numbers ranging from n=20 to n=100 have been prepared by non-resonance-enhanced single-color two-photon excitation from the metastable 2 {^3}S{_1} state.
Cassidy, D. B., Hogan, S. D., Wall, T. E.   +2 more
core   +2 more sources

The diagnostic value of the twinkle sign in color Doppler imaging of urinary stones

The Egyptian Journal of Radiology and Nuclear Medicine, 2014
Objective: To determine the diagnostic value of the color Doppler twinkle sign in the diagnosis of urinary stones. Methods: The study examined 100 urinary stones in 71 patients who presented with urinary symptoms and were suspected to have urinary stones.
Sameh Khodair Ahmad, Mohamed Marzouk Abdallah   +1 more
doaj   +1 more source

Sub-Doppler laser cooling of fermionic 40K atoms in three-dimensional gray optical molasses

, 2012
We demonstrate sub-Doppler cooling of 40K on the D_1 atomic transition. Using a gray molasses scheme, we efficiently cool a compressed cloud of 6.5x10^8 atoms from ~ 4\mK to 20uK in 8 ms.
Chevy, Frédéric, Fernandes, Diogo Rio, Kretzschmar, Norman, Salomon, C., Sievers, Franz, Wu, Saijun   +5 more
core   +1 more source

Ultrasound and Doppler examination capabilities in adult portal hypertension type definition

Patologìâ, 2015
Early portal hypertension type diagnostics is an ultimate factor concerning kind and tactics of treatment. Aim. To objectify ultrasound examination capabilities, portal hemodynamics were studied in 97 patients using impulse and color doppler ...
N. V. Tumanskaya, A. S. Tugushev, E. S. Barskaya, А. А. Fedusenko, E. G. Nordio   +4 more
doaj   +1 more source

High-speed, high-frequency ultrasound, \u3ci\u3ein utero\u3c/i\u3e vector-flow imaging of mouse embryos [PDF]

, 2019
Real-time imaging of the embryonic murine cardiovascular system is challenging due to the small size of the mouse embryo and rapid heart rate. High-frequency, linear-array ultrasound systems designed for small-animal imaging provide high-frame-rate and ...
Aristizabal, Orlando, Ketterling, Jeffrey A., Phoon, Colin K. L., Silverman, Ronald H., Turnbull, Daniel H., Yiu, Billy Y. S., Yu, Alfred C. H.   +6 more
core   +1 more source

Negative refraction with tunable absorption in an active dense gas of atoms

, 2012
Applications of negative index materials (NIM) presently are severely limited by absorption. Next to improvements of metamaterial designs, it has been suggested that dense gases of atoms could form a NIM with negligible losses.
Evers, J., Hennig, R., Keitel, C. H., Orth, P. P.   +3 more
core   +1 more source

Color Doppler Ultrasonography in Mapping Oral Squamous Cell Carcinoma

Middle East Journal of Cancer, 2015
Background: Although Color Doppler Ultrasonography (CDUS) is useful in the diagnosis of various diseases of the head and neck, flow signals in oral malignant masses are less studied; hence the present study assesses the usefulness of Color Doppler ...
Rahul Gandhi, Abhishek Singh Nayyar, Rahul Bhowate, Sweta Gandhi, Girish Dongerwar   +4 more
doaj  

'Color Doppler stripes’ make it difficult to diagnose the severity of valvular heart diseases: a report of two cases

Cardiovascular Ultrasound
Background Echocardiography remains the reference-standard imaging technique for assessing valvular heart disease (VHD), but artifacts like the ‘color Doppler stripe’ can complicate diagnosis.
Yuichi Baba, Yuri Ochi, Juri Kawaguchi, Azumi Takiishi, Daigo Hirakawa, Toru Kubo, Naohito Yamasaki, Hiroaki Kitaoka   +7 more
doaj   +1 more source

Multimodal Deep Learning-Based Classification of Breast Non-Mass Lesions Using Gray Scale and Color Doppler Ultrasound

Diagnostics
Objectives: To propose a multimodal deep learning method for the classification of benign and malignant breast non-mass lesions (NMLs) using grayscale and color Doppler ultrasound and to compare the performance of multi-modality and single-modality ...
Tianjiao Wang, Qingli Zhu, Tianxiang Yu, Denis Leonov, Xinran Shi, Zhuhuang Zhou, Ke Lv, Mengsu Xiao, Jianchu Li   +8 more
doaj   +1 more source