# MUSIC: Cardiac Imaging, Modelling and Visualisation Software for Diagnosis and Therapy
## 5 Discussion  
The MUSIC project brings together various partners in the cardiology world: hospitals, research institutes, and therefore clinicians, researchers, developers, modelling engineers, database specialists, etc. This mixture of professions and objectives requires communication, adaptation and imagination in order to develop computer tools as well as interfaces that correspond to the greatest number of people. In particular, the tools must be easy to use and adapted to the needs of the medical world, which prefers stable and intuitive tools. They must also be modular enough to be used by the researchers who are less interested in stability than in rapid prototyping of the tools and algorithms, and who may want to change the parameters and the tools employed more frequently. The plurality of our users also requires cross-platform applications, including developing and testing on macOS, Windows and Linux. Thus, a continuous integration process had to be created and improved in order to obtain stable and efficient software tools.  
Figure 13: Example of preclinical RF ablation procedure performed under MRI. Three-dimensional (3D) balanced SSFP sequence acquired at the beginning of the session was processed within MUSICardio (**a**) to segment the cavities of the RV and LV. The resulting 3D meshes were then exported to the Montecarlo platform (**b**), allowing real-time 3D catheter navigation and visualisation. After completion of the procedure, 3D T1-weighted images were acquired and processed in MUSICardio (**c**) to automatically compute the transmurality map for each location of RF delivery. Orange arrows show RF lesions with a central thermal necrosis in the hyposignal surrounded by a hypersignal corresponding to oedema.  
Our quality approach is necessary because of the plurality of our users but also because we can promote our code through spin-off companies. The inHEART ([[https://www.inheart.fr](https://www.inheart.fr)]([https://www.inheart.fr](https://www.inheart.fr)), accessed on 1 June 2022) spin-off was created jointly by Liryc IHU and Inria, and it is based on a version of our software. It is thus required to have a controlled development processes in order to help with the regulatory process needed for any software as a medical device.  
An important issue in the development of clinical and research applications is the long-term funding of personnel and equipment not only for software development and continuous improvement but also for database management, beta testing, management, etc. This is not always present in classical academic funding.  
For now, the web portal is accessible only by the members of the VT MUSIC consortium. Our imaging application MUSICardio is accessible by members of our laboratory: researchers and engineers for research purposes, and expert operators and clinicians for the VT MUSIC consortium. The core of MUSICardio (medInria) is open-source and can be tested by the public; however, a lot of the functionalities that we developed are private for now.  
Our tools must also manage more and more data, some of which are very heavy. This impacts the technologies we can use but also the minimal hardware that users must have to run our software: processors, graphics card, hard disk, etc. The balance is complicated to find between the power needed to visualise and apply treatments on very large data and the power of the computers that users can have, especially in hospitals or research centres.