A-mode

A-mode

(mōd),
In diagnostic ultrasound, a one-dimensional presentation of a reflected sound wave in which echo amplitude (A) is displayed along the vertical axis and echo delay (depth) along the horizontal axis; the echo information derives from tissue interfaces along a single line in the direction of the sound beam.

A-mode

(mōd)
diagnostic ultrasound A one-dimensional presentation of a reflected sound wave in which echo amplitude (A) is displayed along the vertical axis and time of rebound (depth) along the horizontal axis; the echo information is presented from interfaces along a single line in the direction of the sound beam.
References in periodicals archive ?
Abstract: To establish reference standards for ocular ultrasound and biometry, 24 cinereous vultures (Aegypius monachus) (45 eyes) underwent B-rnode and A-mode ultrasonographic examination using a 12.5-MHz probe.
Typically, three modes are obtainable in the ultrasonic diagnosis systems; there are A-mode, B-mode and M-mode.
A prominent example is a single fibre optical coherence tomography (OCT) development, which delivers A-mode measurements of the distance between the fibre and the retina (see Figure 3B iii).
An A-mode, or amplitude mode, transducer relies on a narrow beam to scan tissue discontinuity and produces a spike on a graph.
A-mode ultrasonic biometry using 10 MHz linear transducer in amplitude mode was used to measure different intraocular distances (anterior chamber depth, lens thickness and axial length).
At the time of performance testing, ultrasound scanning of the back was conducted with amplitude mode (A-mode) scanners.
An A-mode, or amplitude-mode, transducer relies on a narrow beam to scan tissue discontinuity and produces a spike on a graph.
The transducer was placed in a longitudinal position (sagittal plane) until optimal Bscan images, according to echoes of the A-mode, were obtained.
Although this control strategy works well, in future work we will simulate the SEMG-based 1-DOF prosthetic hand to collect the SMG from both the extensor and flexor with a multichannel A-mode ultrasound system for higher control accuracy.
An A-mode SOU was not performed because of the patient's lack of cooperation.