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Ultrasound has been used to examine the space between your abdominal cavity and your back.

An ultrasound examination involves sending ultrasound waves from an ultrasound probe in the body. Depending on the structure of the tissue, different numbers of ultrasound waves are reflected. These waves are then converted to images that can be viewed on a screen.

To use ultrasound to closely examine tissue or organs, the ultrasound probe should be as close as possible to the location being examined. For this purpose, the ultrasound probe can be inserted into the body using a tube.

A tube with an ultrasound head was inserted via your mouth in order to examine the space between your abdominal cavity and your back. The tube was then pushed down to the first section of your small intestine. In this way the space between your abdominal cavity and your back could be examined through the wall of your small intestine. The abdominal organs are located in the abdominal cavity. The inside of the abdominal cavity is covered by a thin membrane. This thin membrane also surrounds all the organs in the abdomen. The organs can move against each other thanks to this thin membrane. Between the thin membrane of the abdominal wall and the back there is a space that contains a lot of connective tissue and fat. The kidneys, pancreas, part of the large intestine and aorta for instance are located in this space.