Assessment of hemodynamic function with pulsed doppler ultrasound

Solid breast neoplasms: differential diagnosis with pulsed Doppler ultrasound.

In this prospective study, duplex Doppler ultrasound was used in 95 consecutive patients with solid breast masses to evaluate the presence of neovascular flow. A positive Doppler signal, i.e., a Doppler shift frequency of more than 1 kHz using a 5 MHz insonating frequency, was found in 34 of 57 patients with a carcinoma, and also in three patients with a benign condition. These results indicate...

Pulsed Doppler assessment of arterial obstructive disease.

Evaluation of Swallowing Function by Pulsed Doppler Ultrasound Investigation (Preliminary Report)

In this study we suggest that the velocity of water entering the cervical esophagus can be used as an index of pharyngeal swallowing function. In this article, the basic in vitro principles of water and viscous water flow velocity evaluation using ultrasonic methods are introduced. Water flow involving small gas bubbles passing through a silicon tube could be monitored in the B-mode images and ...

Assessment of vascularity with color Doppler ultrasound in gynecomastia.

PURPOSE The aim of this study was to analyze the presence and type of vascularity with color Doppler ultrasound (CDUS) in gynecomastia, to describe gray-scale ultrasound (US) and CDUS features in different stages of gynecomastia, and to compare these findings with the characteristic US appearances of Tanner stages. MATERIALS AND METHODS A total of 108 breasts of 54 males aged 11-27 years with...

Transcranial pulsed Doppler ultrasound findings in brain stem death.

Data are presented from transcranial insonation of the middle cerebral artery (MCA) performed at intervals in 23 unconscious children for whom the outcome was subsequently poor. Once an MCA signal had been observed over a 30 minute period with time averaged velocity less than 10 cm s-1 and/or a direction of flow index, DFI, defined as 1 minus the ratio of reverse to forward flow of less than 0....