insonation

Pulsed Doppler ultrasound was recorded using an insonation angle of 45 -60 .

Because the bones of the skull block the transmission of ultrasound, regions with thinner walls - insonation windows - must be used for analyzing.

Any change of frequency is proportional to the velocity of blood flow, and is therefore dependent on the angle of insonation.

Furthermore, Doppler sound and spectra are synthezised based on an accurate physical model of ultrasound insonation in a range of normal and pathological cases.

Also known as SonoCT, spatial compound sonography is a relatively new technique that uses multiple differing angles of insonation to create an ultrasound image.

Lorimer, "Sonoelectrochemistry - cyclohexanoate electrooxidation at 38 kHz and 850 kHz insonation frequencies compared", Electrochem.

Collaborative work with Sydney University shows how the velocity spectra can contain artifacts due to incomplete insonation, wall reflection and wall refraction, and predicts when these effects are likely to be important.

A curved acoustic impedance interface, as may be encountered in vitro in flow phantoms or in vivo in vascular disease, leads to nonuniform insonation and spectral distortion which depends on transducer orientation.

Two 2-MHz probes are affixed in the probe holder and insonation performed to determine the optimal position for continuous monitoring of both MCA main stems at 50 mm depth from the surface of the probe.

Br J Obstet Gynaecol 1997; 104: 626 - 7. Denbow ML, Cox P, Talbert D, Fisk NM Colour Doppler energy insonation of placental vasculature in monochorionic twins: absent arterio-arterial anastomoses in association with twin-twin transfusion syndrome.