Additive manufacturing has opened the possibility of creating anatomical twins that mimic the desired properties of the target organ for patient-specific rehearsal and physicians’ advanced training. These anatomical twins can improve the ability of surgeons by allowing them to practice a specific surgical intervention while going through the same experience as the actual operation and reduce the risk of error or failure. Minimally invasive catheter-based endovascular procedures are a particular example of these types of operations. With interventional cardiology incisions reduced to a few millimeters in size, these procedures are guided by real-time medical imaging techniques such as ultrasonography. In this imaging technique, the images are reconstructed by emission and reception of the ultrasound. In order to mimic interventional cardiology procedures, a synthetic organ must provide a similar echocardiography image compared to the real organ. In other words, it should replicate the ultrasonic signature of a human organ, which depends on the 3D-printed microstructure and the properties of the constituent materials. However, due to the lack of knowledge and control over the characteristics of printed materials, the correlation between the printed microstructure and its ultrasonic signature is not yet fully understood. For this purpose, we believe numerical simulation could be useful to study the propagation of ultrasound inside the printed organ with the aim of improving its echogenicity. Nevertheless, this numerical simulation is very expensive due to the heterogenicity of the composite 3D-printed microstructure and the high-frequency range of ultrasonic medical imaging (1-10 MHz). In this study, the space discontinuous Galerkin finite element method is employed as it is well-established for solving wave propagation problems in heterogeneous media. Furthermore, it is well-suited for developing massive parallel solvers and meeting the challenge of computational cost. By taking the simulated signals and employing an image reconstruction algorithm, the B-mode image of printed synthetic samples is obtained and analysed. This approach will allow to observe the influence of printed microstructure and the material properties on the final echocardiography image. Therefore, it would be possible to optimize the material properties and the microstructure characteristics to acquire the best possible images similar to those of the real organs. This work is part of an ongoing collaboration between Biomodex and MSSMat (Centralesupelec, Paris-Saclay University).