The flocculus in computed tomography.
The flocculus may simulate a cerebellopontine angle mass in computed tomography (CT). The CT appearance of the flocculus was compared with acoustic neuroma. Normal internal auditory canals, symmetric cerebellopontine angle cisterns, modest contrast enhancement, and a location posterior to the porus acousticus distinguish the flocculus from an acoustic neuroma.
The Normal Contrast‐Enhanced Computed Axial Tomogram of the Brain
Intravenous administration of iodinated contrast agents permits identification of the major cerebral arteries and veins: third, fourth, and lateral ventricular choroid plexuses: falx and tentorium on appropriate sections of contrast-enhanced computed axial tomographic (CECT) images. Combinations of these normal vascular structures into conglomerate densities may produce confusing contrast pseudotumors on CECT images.
Design of a low power viterbi decoder for wireless communication applications
In this paper, a novel low-power Viterbi decoder with soft decision is proposed. For the branch metric of the Viterbi decoder, our design employs a soft-decision method to improve its correction capability. In order to find the survivor path efficiently, we modify the classical Viterbi decoding algorithm into a new one. This new algorithm is similar to the register-exchange method with lower latency, but using RAM instead of register banks for recording the output bit-stream of the survivor path. Hence, our design can provide a low-power design. Finally, the chip of this design consumes about 28.6K gates using TSMC 0.18 μm CMOS technology. The power consumption of our chip is about 19.5mW at 100MHz.