Seeing is no longer enough: Why 3D anatomical models are becoming a new language in medical imaging

For several decades, medical imaging has relied on the interpretation of two-dimensional slices derived from MRI, CT scans, or ultrasound. These technologies have profoundly transformed diagnosis and patient management by providing an increasingly precise view of human anatomy.

Today, science continues to evolve. Driven by technological and digital advances, a new approach is gradually emerging: 3D anatomical modeling. It introduces a different way to observe, analyze, and use medical images.

The 3D anatomical model is progressively becoming a genuine support for understanding, planning, and clinical decision-making. This evolution transforms not only the images themselves, but also the way clinicians interact with anatomy.

In this article, we explore why this third dimension is reshaping medical imaging.

What is a 3D anatomical model?

A 3D anatomical model is a volumetric reconstruction of an organ or anatomical structure based on medical imaging data. While 2D imaging relies on the successive analysis of MRI, CT, or ultrasound slices, 3D modeling enables visualization of anatomy as a whole.

The 3D model is created through a segmentation process that involves identifying and precisely delineating the different anatomical structures. The result is a representation that is:
• manipulable
• measurable
• interactive
• usable for clinical planning

This evolution does not replace 2D imaging; it complements it by providing a more immediate spatial understanding. Volumes take shape, relationships between structures become clearer, and analysis becomes more fluid. Depending on the intended use, these models can be visualized digitally, integrated into planning tools, used in interventional navigation, or produced as physical 3D prints for educational or preoperative purposes.

The objective is to transform imaging data into a more tangible support, closer to the patient’s anatomical reality, in order to facilitate understanding and clinical decision-making.

Demonstrated benefits of 3D anatomical models across medical specialties

To date, numerous clinical studies have evaluated the impact of 3D anatomical models in medical practice. The findings show tangible benefits, particularly in terms of precision and procedural organization. The following examples illustrate their use across different specialties.

Orthopedics: The use of 3D anatomical models has been studied for preoperative planning in complex interventions and for the design of patient-specific implants. Several scientific reviews report a significant reduction in operative time, blood loss, and the need for intraoperative imaging compared with approaches relying solely on 2D imaging. 3D modeling improves the understanding of fractures and deformities and enables surgical strategies to be more precisely adapted to the patient’s anatomy.
Source: Applications of 3D printing in orthopedics: a scoping review, Springer.

Cardiology: In cardiology, 3D anatomical models are widely used in the management of congenital heart disease and complex structural procedures. They enable precise visualization of cardiac anatomies that vary considerably from one patient to another and support the adaptation of interventional strategies in advance. This approach contributes to improved team preparation and more secure procedural planning.
Source: Cardiac 3D Printing and its Future Directions, JACC: Cardiovascular Imaging (2017)

Neurosurgery: In neurosurgery, 3D anatomical models are used to prepare interventions involving complex cerebral structures. They provide improved visualization of the relationships between tumors, vessels, and functional areas, and allow for more accurate anticipation of surgical trajectories. This approach contributes to safer operative planning in situations where precision is critical.
Source: 3D Printing in Neurosurgery, PMC

Oncology: In oncology, 3D anatomical models allow precise visualization of tumor volumes and their relationships with surrounding structures. They facilitate planning of complex resections and support a more personalized treatment approach. Recommendations published by the RSNA acknowledge the clinical relevance of medical 3D printing in several surgical scenarios, including oncologic contexts.
Source: RSNA 3D Printing Special Interest Group (SIG).

From 2D imaging to 3D visualization to clinical integration

3D anatomical modeling goes beyond visualization. It is gradually becoming integrated into the care pathway by structuring the way images are analyzed, shared, and used to inform decisions. By providing a clear and shared representation of anatomy, it facilitates multidisciplinary discussions and strengthens the consistency of decisions, while highlighting the specific characteristics of each patient.

Advances in digital tools and the automation of segmentation processes now make these models faster to produce and easier to integrate into existing systems. As a result, 3D modeling is becoming a practical operational support, contributing to more precise, more collaborative, and deeply personalized medicine.

Conclusion

3D anatomical modeling is progressively establishing itself as a natural evolution of medical imaging. By transforming data into usable spatial representations, it enhances anatomical understanding and supports more precise decision-making.

This approach takes on particular significance when dealing with complex and evolving organs. The prostate, for example, is located at the intersection of closely interconnected and sensitive anatomical structures. Its volume and morphology change over the course of life, making each clinical situation unique. In this context, having access to a 3D anatomical model appears as a logical way to better understand its specific features and adapt diagnostic or therapeutic strategies accordingly.

As technologies continue to advance and automation develops further, 3D modeling paves the way for increasingly personalized imaging, serving the broader objective of precision medicine.