Results 161 to 170 of about 514,588 (251)

Light-RepViTSR: ultra-lightweight super-resolution for real-time photoacoustic endoscopy in tumor biopsy. [PDF]

Front Bioeng Biotechnol
Jiang G, Yang R, Fang Z, Luo Y, Yu X, Liu L.   +5 more
europepmc   +1 more source

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Ultrasonic A-scan to B-scan conversion by an optical fibre device

Ultrasonics, 1972
Abstract A system is described which can convert an A-scan ultrasonic unit into a compound B-scanner. In this system a flexible array of optical fibres and a mechanical arrangement take the place of the position locating electronics and mechanical gantry of a conventional compound B-scan unit.
W. Mcdicken
openaire   +3 more sources

Ultrasonic liver scanning: the quantitative analysis of the normal A-scan

Physics in Medicine & Biology, 1972
Previous methods of interpreting ultrasonic liver scans are discussed. A system is described in which the performance was calibrated in terms of measurable quantities; this avoided any possibility of distortion being caused by observer bias. The results of the examinations of 30 individuals with normal livers are reported: 30 scans of each individual ...
R A, Mountford, P N, Wells
openaire   +3 more sources

Ultrasonic liver scanning: the A-scan in the normal and cirrhosis

Physics in Medicine & Biology, 1972
Techniques for the analysis of ultrasonic A-scans of the liver were used to compare the scans of 30 normal livers with those of 13 with cirrhosis. The ultrasonic frequency was approximately 1.5 MHz. Thirty scans of each liver were analysed using a computer.
R A, Mountford, P N, Wells
openaire   +3 more sources

CEPSTRAL PREDICTION ANALYSIS OF THE SIGNAL PATHWAY IN AN ULTRASONIC A-SCAN

Journal of Sound and Vibration, 2000
Abstract Digital deconvolution of ultrasonic echo signals improves resolution and the quality of ultrasonic images. The Homomorphic deconvolution technique under noisy conditions is applied to simulation results in an ultrasonic pulse–echo amplitude scan line.
M.G.S. ALI, A.RAOUF MOHAMED
openaire   +2 more sources

Rapid detection of cracks in the rail foot by ultrasonic B-scan imaging using a shear horizontal guided wave electromagnetic acoustic transducer

, 2021
Transverse cracks in the rail foot are responsible for the breaking of the rail. The existing non-destructive testing technology for high-speed railway track is difficult to perform in-situ and rapid detection for the rail foot, which poses a hidden ...
Songtao Hu, Wenze Shi, Chao Lu, Yao Chen, Guo Chen, G. Shen   +5 more
semanticscholar   +1 more source

Ultrasonic C-scan techniques for the evaluation of impact damage in CFRP

, 2021
In the present work, different ultrasonic C-scan approaches were used to evaluate Carbon Fiber Reinforced Polymers (CFRP) submitted to impacts of low energy, in order to evaluate their effectiveness for the detection and characterization of small defects.
Mário J. Santos, Jaime B. Santos, P. Reis, A. Amaro   +3 more
semanticscholar   +1 more source