axial resolution

axial resolution

The spatial resolution of an image in the direction of ultrasound propagation in pulse-echo ultrasonography, which is determined primarily by the duration of the ultrasonic pulse.

The ultrasonic pulse is the period of time of mechanical reverberation of the transducer after electric stimulation; ≥ 2 objects or organs aligned in the axial direction cannot be distinguished if they are separated by ≤ half a pulse length; autosomal recessive is believed to have reached its maximum with the introduction of modern ferroelectric ceramic transducers, which have improved backing and matching layers.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
References in periodicals archive ?
(25) Briefly, [micro]OCT is conducted with a spectral-domain OCT system with a broad bandwidth supercontinuum light source spanning from 650 to 950 nm, which provides an axial resolution of less than 1 [micro]m in tissue.
'A diagnostic run takes about five minutes and provides images with an axial resolution of 10pm and a lateral resolution of about 30pm,' explained Tearney.
Limitations include high phototoxicity, insufficient axial resolution, a need for specialized sample handling devices, and lack of tools for precise compound administration.
While SD-OCT is typically slower than SS-OCT, it offers superior phase stability and axial resolution, which is beneficial in Doppler flowmetry or capillary imaging that require high phase stability and fine axial resolution.
They demonstrated that the axial resolution was higher in AS-OCT compared to USB and that AS-OCT was superior in visualizing lesions involving the lateral and anterior aspects of the iris.
Fortunately, axial bulk motion noise is rejected by split-spectrum amplitude-decorrelation angiography [9], which trades some of the axial resolution for decreased noise and higher transverse resolution [10].
When testing the axial resolution, the transducer was adjusted to be perpendicular to the wire phantom, while for lateral resolution testing it will be parallel to the wire phantom, just as Figure 7(a) shows.
Axial resolution, offered by listed devices, is as follows: Pentacam-Scheimpflug camera--10 [micro]m, Visante OCT--18 [micro]m, and Casia OCT--10 [micro]m.
Image resolution is determined by lateral and axial resolution. Lateral resolution is the same as in widefield microscopy, and is given by the numerical aperture (NA) of the detection objective and the wavelength.
The functionality and potential of time-domain (TD-OCT) machines was limited due to slow scanning speeds of 400 A-Scans per second and an axial resolution of 10[micro]m.
The ability of instrument to distinguish between two structures located very close together along axis of ultrasound beam is called its axial resolution. The axial resolution is best when groups of waves emitted have a short wave length.