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761  Articles
1 of 77 pages  |  10  records  |  more records»
Nghiên c?u nh?m mô t? m?i liên quan gi?a d?c di?m siêu âm doppler nang lu?ng và phân d? Mauro mondellli c?a b?nh nhân có h?i ch?ng ?ng c? tay. Phuong pháp mô t? c?t ngang th?c hi?n ? 36 b?nh nhân v?i 49 c? tay có h?i ch?ng ?ng c? tay du?c ch?n doán h?i ch... see more

Christian Doppler, an Austrian physicist, described in 1842 the apparent change in frequency of a wave when motion of the source or the observer is involved. Named after him, this change in observational frequencies is known as the Doppler Effect. The for... see more

Understanding the concept is one of the essential needs teachers pursue in improving student competence in the current era of openness. One of the learning models that can sharpen and encourage students' understanding of physics concepts is problem-based ... see more

In this work, in the process of plane-wave ultrasound probing from different angles the attainable spatial resolution was estimated on the basis of the previously developed theory of the Doppler response formation. In the theoretical calculations coherent... see more

Doppler spread akan menyebabkan terjadinya pelebaran spektral sinyal informasi sehingga menganggu ortogonalitas antar subcarrier atau biasa disebut  Inter Carrier Interference (ICI) pada sistem OFDM. Pengestimasian doppler spread akan berguna  u... see more

Background: Various pathological changes in both the intra and extracranial arteries that supply the brain can cause disturbance of cerebral blood flow and perfusion leading to cerebral dysfunction. Doppler ultrasound is able to assess these changes. This... see more

Objective: The paper uses ultrasound Doppler fetal heart rate detection algorithm to explore the placental characteristics of monochorionic twin pregnancy with selective fetal growth restriction, and discuss the correlation between selective fetal growth ... see more

Dalam penelitian ini telah dirancang sebuah sistem ultrasonik yang akan digunakan untuk mengukur kecepatan aliran darah. Sistem yang dirancang ini menggunakan prinsip ultrasonik doppler gelombang kontinyu dengan frekuensi 4MHz. Prinsip kerja dari sistem i... see more

The article analyzes modern literature data on the importance of studying the hemodynamics of uterine tumors with dopplerometry in two - and three - dimensional regimens of echography for differential diagnosis of simple proliferating leiomyomas and sarco... see more

1 of 77 pages  |  10  records  |  more records»