International Journal of Applied Engineering Research, vol: 10,13 (2015)
Effect of gain changing to maximum visualization depth on diagnostic ultrasound B-mode image
Maslebu G., Adi K., Suryono
Abstract
The effect of gain to maximum depth of visualization on B-mode ultrasound image has been investigated using computer based image processing. The purpose of this study is to support quality control program using phantom multipurpose multi tissue and multifrequency transducer, Curved Array Transducer CH5-2. Scanning of phantom was done using fixed frequency 2,2 MHz and 3,6 MHz with gain variation of 30 dB, 35 dB, 45 dB, and 50 dB. The data analysis was using global thresholding in segmentation and Euclidean distance to determine maximum depth of visualization. As the gain increase, thus the image is brighter and depth of visualization is deeper. It is because the anechoic cylinder objects are clearly seen on the image. Using the low value of gain, the image is getting darker, thus depth of visualization is getting shallow. Using 2,2, MHz frequency, the smallest value of depth of visualization is 9.97 cm using 30 dB gain and it increased up to 13,2 cm at the highest gain used, 50 dB. Using 3,6 MHz frequency, the smallest value of visualization depth is 10.08 cm using 30 dB gain and it increased up to 13,12 cm at the highest gain used, 50 dB. It is proved that there is influence of gain to visualization depth determination of ultrasound image. © Research India Publications.
Keyword: B-mode USG; Depth of visualization; Gain; Image