K Adi dan Suryono G Maslebu
ABSTRACT
In the service unit of radiology, ultrasound modality is widely used because it has
advantages over other modalities, such as relatively inexpensive, non-invasive, does not use
ionizing radiation, and portable. Until now, the method for determining the depth visualization
on quality control program is through the visual observation of ultrasound image on the
monitor. The purpose of this study is to develop a computer-aided system to determine
maximum depth of visualization. Data acquisition was done by using B-Mode Diagnostic
Ultrasound machine and Multi-purpose Multi-tissue Ultrasound Phantom model 040GSE.
Phantom was scanned at fixed frequency of 1,8 MHz, 2,2 MHz, 3,6 MHz and 5,0 MHz with a
gain variation of 30 dB, 45 dB, and 60 dB. Global thresholding and Euclidean distance method
were used to determine maximum visualization depth. From this study, it is proved that the
visualization depth using computer aided provide deeper visualization than visual
interpretation. The differences between expert verification and the result of image processing
are < 6%. Thus, computer aided system can be used for the purpose of quality control in
determining maximum visualization depth of B-Mode diagnostic ultrasound image.