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Kaoru Yamashita,Akira Tsuchitani,Hideyuki Murakami,Masanori Okuyama,Shigeru Arita,Tsunehisa Tanaka,Yaowu Mo,Yoshihiko Suzuki 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.IV
Arrayed ultrasonic microsensors using piezoelectric PZT (Pb(Zr,Ti)O3) thin lms on micromachined silicon diaphragms have been fabricated and combined with BBD (Backet Brigade Device) for signal processing. The ultrasonic sensors are designed to compose an electrical phased array for three-dimensional object detection in air. The resonant frequencies of the elements were scattered in the error range of 12 % and the objects could not be detected due to the beat in the sum of delayed element waveforms. Each element has been tuned by adequate poling less than 10 V to make its resonant frequency equal to a center value. The frequency scattering was reduced within the range of 2 % and the tuned array could give the objects by summing up of the delayed signals. Three-dimensional object detection has been demonstrated using the tuned sensor combined with the BBD delay circuit.4
Daisuke Sugiyama,Shigeo Ikeno,Tetsuya Tsuchihashi,Shigeru Yokota,Hiroaki Ina,Tetsuya Kono,Kunihiko Yamashita,Mikito Kawamata 대한마취통증의학회 2014 Korean Journal of Anesthesiology Vol.67 No.5
Pulmonary artery (PA) rupture caused by a PA Swan-Ganz catheter is a rare complication but remains fatal in almost50% of cases. False aneurysm of the PA is a rare presentation of PA rupture and should be considered as a possible diagnosisin a patient with a new lung mass after PA catheterization. We present a case of sudden-onset pulmonary alveolarhemorrhage during cardiovascular surgery due to a traumatic PA false aneurysm. The Swan-Ganz catheter might havebeen displaced by the thoracic aortic aneurysm with displacement of the catheter causing the false aneurysm and bleeding.