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. 2024 May 13;19(5):e0300451. doi: 10.1371/journal.pone.0300451

Fig 2. Designs of the polymer molds and diagrams of the phantoms produced.

Fig 2

a) Polymer mold designs and side profile images of the printed polymers. Mold A was designed to compare lateral resolution with decreasing feature lateral separation. Mold B also compared lateral resolution but with decreasing feature width. Mold C examined axial resolution with decreasing feature heights. Mold D also investigated axial resolution by decreasing vertical separation of features. b) Diagrams of phantoms produced using the polymer molds. The molds were embedded in gelatin and imaged as high acoustic reflectivity phantoms. The molds were subsequently removed from the gelatin, leaving a gelatin imprint of the mold. Gelatin imprints from each mold were submerged in water and imaged as low acoustic reflectivity phantoms. *Correspond to features that were not preserved during removal of the polymer mold and were therefore unavailable for comparison.