Acoustic impulses produced through the mechanism of the laser-induced breakdown in water have been investigated in the range from 0℃ to room temperature. Differently from the acoustic impulses produced via thermal ex...Acoustic impulses produced through the mechanism of the laser-induced breakdown in water have been investigated in the range from 0℃ to room temperature. Differently from the acoustic impulses produced via thermal expansion, the polarity and the amplitude of acoustic impulse produced via liquid breakdown mechanism do not change with water temperature. This indirectly proves that the production of acoustic impulse is due to the expansion of the cavity itself which includes plasma. A semiempirical description of this phenomenon is given in this paper.展开更多
This paper presents photoacoustic and ultrasonic dual-mode imaging for real-time detection of submucosal gastric cancer with a combination of gastroscopy.The diagnostic capacity was directly addressed via several phan...This paper presents photoacoustic and ultrasonic dual-mode imaging for real-time detection of submucosal gastric cancer with a combination of gastroscopy.The diagnostic capacity was directly addressed via several phantoms and ex vivo experiments.Results demonstrated that superficial and submucosal gastric cancer can be diagnosed with a perceptible depth of 6.33 mm,a lateral accuracy of 2.23 mm,and a longitudinal accuracy of 0.17 mm though capturing the morphology of angiogenesis,which is a main character of the therioma-related change.The capability of gastroscopy-conjugated photoacoustic and ultrasonic dual-mode imaging system will own great potential in improving the clinical diagnostic rate of submucosal gastric cancer.展开更多
基金The project was supported by the National Natural Science Foundation of China
文摘Acoustic impulses produced through the mechanism of the laser-induced breakdown in water have been investigated in the range from 0℃ to room temperature. Differently from the acoustic impulses produced via thermal expansion, the polarity and the amplitude of acoustic impulse produced via liquid breakdown mechanism do not change with water temperature. This indirectly proves that the production of acoustic impulse is due to the expansion of the cavity itself which includes plasma. A semiempirical description of this phenomenon is given in this paper.
基金National Natural Science Foundation of China(Grant Nos.61675043,81571726,and 81901787)the Natural Science Foundation of Fujian Province,China(Grant Nos.2018J01785 and 2018J01659).
文摘This paper presents photoacoustic and ultrasonic dual-mode imaging for real-time detection of submucosal gastric cancer with a combination of gastroscopy.The diagnostic capacity was directly addressed via several phantoms and ex vivo experiments.Results demonstrated that superficial and submucosal gastric cancer can be diagnosed with a perceptible depth of 6.33 mm,a lateral accuracy of 2.23 mm,and a longitudinal accuracy of 0.17 mm though capturing the morphology of angiogenesis,which is a main character of the therioma-related change.The capability of gastroscopy-conjugated photoacoustic and ultrasonic dual-mode imaging system will own great potential in improving the clinical diagnostic rate of submucosal gastric cancer.
