As ultrasound is the most common method for medical imaging, a lot of money could
be saved if the equipment were cheaper. A problem is that the cheaper available
scanners are less documented.
To evaluate a scanner bought for the institution of applied physics, three categories
were pondered. The resolution, contrast and safety of the scanner was of most interest.
In order to provide results several measurements were performed. Screws of different
dimensions were used for evaluating the resolution, whereas different materials
were observed for the contrast. A method to investigate safety was tried by applying
the ultrasound probe to water and measuring the transferred heat.
Results of the measurements ended up showing that the resolution was about four
times lower when comparing with a commercial scanner. The contrast has a large
dependence on the difference of acoustic impedance between object and medium.
Lastly, a groundwork for investigating the safety was made.
2016. , 18 p.