Fat suppression with short inversion time inversion-recovery and chemical-shift selective saturation: a dual STIR-CHESS combination prepulse for turbo spin
echo pulse sequences.
where [a.sub.k] is the amplitude of the shape of the kth
echo pulse and [[tau].sub.k] is its time delay.
Due to acoustic pulse transmitting and echo receiving the lag between can be measured, and the velocity of sound in the oceans is known, so they can take advantage of the
echo pulse radiation of underwater target detection, location and recognition.
(1) [T.sub.1]-weighted, spin
echo pulse sequence, repetition time (300 ms), echo time (18 ms), section thickness (6 mm), field of view (26 cm), number of excitations (2), and matrix size (256 x 256);
As shown in (11), the phase of STRETCH processing
echo pulse is related to the radial distance [R.sub.i] of target and the reference distance [R.sub.ref].
The bottom end of the secondary
echo pulse of the wave train was coincided to the gate pulse.
The ST-270 SonicLaser ultrasonic sensors use
echo pulse technology that measures the round trip time-of-flight of acoustical transmissions reflected from a liquid, slurry, granular or free flowing powder surface in almost any industry, according to the company.
On receive, the
echo pulse is routed from the antenna to the RF preamplifier and mixer, where it is translated to an intermediate frequency.
Strong
echo pulse from the phantom target occurring at the depth of 22 mm is shown magnified on Fig.2, (c) and its amplitude spectra on Fig.