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We have demonstrated a personal identification system that is based on near-infrared finger vein patterns. Finger vein patterns of 678 volunteers are acquired by transmitting near-infrared light through a finger and capturing the image with a CCD camera. These vein patterns are enhanced by a background-reduction filter. The similarity between two patterns(More)
BACKGROUND Functionalized fullerenes, such as polyhydroxy fullerenes (PHF), have attracted particular attention due to their water solubility and their potential application in tumor imaging and therapy as carbon nanomaterials. In this study, the sonodynamically-induced antitumor effect of PHF was investigated. MATERIALS AND METHODS(More)
PURPOSE The purpose of this study was to investigate the sequential changes in rat artery blood flow and tissue degeneration after exposure to high-intensity focused ultrasound (HIFU) in vivo. METHODS HIFU was applied through the skin to the femoral artery of Sprague-Dawley rats. The peak intensities used were 530, 1080, 2750, and 4300 W/cm(2). After(More)
Kremkau wrote a historical review of the use of ultrasound in cancer therapy in 1979((1)) In 1990, Kondo and Kano published a Japanese review of the implications of the thermal and nonthermal effects of ultrasound in the treatment of cancer(2)). Again in 2000, Kondo et al reviewed the therapeutic applications of ultrasound and shock wave, emphasizing their(More)
To obtain an optimal condition for ultrasound (US)-induced apoptosis that could be useful for cancer therapy, we applied low intensity pulsed US to sonicate U937 cells in vitro. Cells were then incubated at different time intervals before measuring apoptosis. The apoptosis was assessed by DNA fragmentation and phosphatidylserine externalization. The pattern(More)
This study was an investigation of arterial contractility in response to high-intensity focused ultrasound (HIFU) and of histologic changes to the artery with various intensities of HIFU. We constructed a prototype HIFU transducer in combination with an imaging probe that provides color Doppler imaging and Doppler velocimetry. HIFU was applied through the(More)
The ultrasonic power absorbed by a microbubble in its continuous wave response is estimated through numerically solving a version of the Rayleigh-Plesset equation. At an ultrasonic frequency of 3 MHz, a resonant microbubble, approximately 1.1 microm in radius, showed an absorption cross section of about 0.005 mm2 in its low power response. This estimation(More)
In this study, we investigated the induction of apoptosis by ultrasound in the presence of the novel porphyrin derivative DCPH-P-Na(I). HL-60 cells were exposed to ultrasound for up to 3 min in the presence and absence of DCPH-P-Na(I), and the induction of apoptosis was examined by analyzing cell morphology, DNA fragmentation, and caspase-3 activity.(More)
The ultrasonically induced cytotoxic effect of erythrosin B (EB) on isolated sarcoma 180 cells was investigated. The tumor cells were suspended in an air-saturated phosphate buffered saline and exposed to ultrasound at 1.93 MHz in a standing-wave mode for up to 60 s in the presence and absence of EB. The rate of cell damage induction by ultrasound was(More)
PURPOSE Ultrasonically induced cell damage and active oxygen generation with photofrin II were compared using the same in vitro insonation setup. METHODS Sarcoma 180 cells suspended in an air-saturated phosphate-buffered saline solution were exposed to ultrasound at 2 MHz for not more than 60 s in the presence and absence of photofrin II. The trypan blue(More)