Interest in using the higher harmonic generation of ultrasonic guided wave modes for nondestructive evaluation continues to grow tremendously as the unders... VK Chillara,CJ Lissenden - 《Optical Engineering》 被引量: 45发表: 2016年 Structural imaging through local wavenumber estimation of guided wav...
(The actual risk of ionizing radiation is still an open question, and imaging systems based on x-ray absorption are considered minimally invasive.) Both ultrasound and x-ray imaging would be considered less invasive than, for example, monitoring internal cardiac pressures through cardiac ...
The logarithmic time axis allows display of very early latency ‘brainstem responses’ (waves I-VI), ‘midlatency’ responses (No-Nb), ‘vertex’ potentials (P1-N2), and task-related endogenous components (Nd, N2, P300 and slow wave) (from Hillyard and Kutas 1983: with permission, from ...
Blood signal intensity is high when the imaging plane is perpendicular to the course of blood flow. Normal variations in cerebral venous anatomy and their potential pitfalls on 2D TOF MRV examination: Results from a private tertiary care hospital in Karachi An early small series of patients with ...
McGraw-Hill Concise Encyclopedia of Engineering. © 2002 by The McGraw-Hill Companies, Inc. signal-to-noise ratio (S/N ratio) The ratio, at a selected point in the circuit, of signal power to noise power. It measures the comprehensibility of a data source or transmission link, usually ex...
MRI The ratio obtained from the relative contributions of detected true signal to that of random superimposed signals–'noise'. SeeMagnetic resonance imaging. McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc. ...
Intrinsic optical signal (IOS) imaging is a technique for measuring changes in blood flow, metabolism, and cellular swelling associated with neuronal activity. The combined spatial and temporal resolution, in addition to the ability to sample large areas
An ultrasound instrument for imaging interior portions of the human body is a sophisticated system; it comprises many high-speed processing elements and subsystems. The underlying concept behind ultrasound imaging is similar to that of sonar. A sound wave is transmitted from a transducer or transduce...
For those interested, discussion of analogue filter design can be found in Horowitz & Hill (1989) or Lancaster (1996). Sign in to download full-size image Figure 4.8. Improvement in sharpness of roll-off with increasing numbers of active filter stages. Attenuation-frequency response curves for ...
In particular, the discovery of fiber Bragg gratings (FBGs) by Hill and co-workers in 1978 has opened up an unprecedented opportunity for FBGs to perform optical signal processing which has revolutionized the fields of telecommunications and optical fiber sensing9,10,11,12. Benefiting from the ...