In order to find the most suitable material/s to conduct a test with a sonographer, I carried out a little experiment with the 2D ultrasound machine.
Firstly I have tried to examine the FAST phantom, however as the objects lies quite deep from the surface, nearly no change in shape can be observed.
I have than tried with a balloon filled with water, by placing it on top of a flat silicon surface, a trapezium shape could be seen. As I apply some force to the balloon, the height of the trapezium become smaller. The problem is that as there is no constrains of motion of the balloon, only a low level of force can be applied before the balloon rolls away.
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| No Force Applied |
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| Slightly Pushed |
In order to test the water balloon "phantom" with a larger force to see a higher degree of change in shape, I have sandwiched it into two slices of silicon with a hollow space in between. The bottom slice has a "W" shaped hollow space, when no force is applied, the two sides of the "W" is not in contact with the surface, where as the force increases, the "W" would move towards the surface until the middle ditch of the "W" nearly touches the surface.
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| No Force |
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| Slightly Pushed |
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| Moderate Level of Force Applied |
As the shape of water balloon is a ball, the change in shape is less noticeable. If a irregular shaped balloon such as an animal shaped is used, the change might increase to a greater extent.
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