• Journal of the Korean Society of Radiology
• /
• v.18 no.6
• /
• pp.773-781
• /
• 2024

This study attempted to minimize the risk of hospital infection by ultrasonic gel by using hand sanitizer with microorganism removal effect as an ultrasonic propagation medium. As a research method, Near field group, Vertical distance, and Horizontal distance evaluations were conducted using various probe covers on Samsung Medison's R7 ultrasonic equipment, and through grayscale evaluation, we tried to find the ethanol content of the hand sanitizer that can obtain an image that is most similar to the grayscale level of the ultrasonic gel. As a result of analysis using the Image J program, the combination of Latex cover and 70% ethanol gel was the best in terms of image quality, and this combination is thought to provide an effect of preventing infection while maintaining image quality similar to that of using ultrasonic gel.

• The Journal of the Acoustical Society of Korea
• /
• v.21 no.8
• /
• pp.766-771
• /
• 2002

In this study, we have developed a 3-dimensional diagnostic ultrasonic sector probe using a convex type ultrasonic probe with 128 active elements. The probe was made to operate at the center frequency of 4.5㎒ with the bandwidth of 66%. The driving part was designed to rotate the axis of the convex probe by means of a step motor equipped with reduction gears and spur gears attached to the motor so that the probe could enable us to acquire a series of 2-dimensional images to construct a 3-dimensional image. Acoustic cover of the probe was made of polymers to have the same radius of rotation as that of the convex probe. The controllability of the rotation angle and the structural stability of the probe were confirmed through experimental 3-dimensional images obtained using the developed 3-dimensional sector probe.