Abstract: A system including a tissue bath; a portion of intestine positioned within the tissue bath, the portion of intestine having a first end and a second end; a pump coupled to the first end of the portion of the intestine and configured to pump a fluid through the portion of intestine; a light source positioned to illuminate the portion of intestine, a camera positioned to capture a stream of images showing movement of the portion of intestine; and a computing system coupled to the camera, the computing system including: a processor, and a memory storing instructions causing the processor to: receive the stream of images, identify a location along the portion of intestine in each image of the stream of images in real time, and measure an edge width at the location along the portion of intestine in each image of the stream of images in real time.

Abstract: A solid freeform fabrication process and apparatus for producing three dimensional parts using layer-by-layer deposition of support powder and part compositional powder, where the deposition is accomplished using electro-photographic powder deposition technology to create a three-dimensional green part. Each successive loose powder layer is deposited directly onto the previously deposited powder layer, which has been compacted or fused to its underlying layer. After all powder layers have been deposited the green part is further processed such that the part compositional powder is fused to create a high-density part while the support powder is easily removed.