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Introduction: In Scandinavia, where severe trauma is rare but potentially life-threatening, trauma teams must maintain high performance despite infrequent activations. Although advancements in trauma care have reduced mortality, severe multi-trauma still carries a high mortality risk of death, requiring rapid, coordinated responses from teams of diverse professionals. This study explores the interdependence between various trauma team members, with a particular focus on how radiographers' roles are understood, integrated, and relied upon in trauma care.

Methods: A qualitative design was employed, with data collected from four Swedish hospitals through interviews and observations. Braun and Clarke's reflexive thematic analysis method guided the iterative process to identify and generate patterns in the data.

Results: The analysis generated an overarching theme of Team integration through behavioural interdependence, along with three specific themes: (I) Collaborative interdependence: enhancing team synergy through dynamic role adaption; (II) Social interdependence: fostering trust through interpersonal relationships; and (III) Goal interdependence: aligning objectives for unified success.

Conclusion: The findings highlight the importance of team-enhancing behaviours to build high-performing trauma teams. Radiographers contribute through adaptive collaboration, technical expertise, and relational engagement. Equally important are the supportive behaviours of team members and leaders—such as clear communication, inclusion in decision-making, and recognition of radiographers' expertise—which enable radiographers to perform effectively. Clearly defined roles and shared objectives reinforce their value in trauma care.

Implications for practice: Effective team guidance and psychological safety are essential for improving team dynamics and outcomes. Regular, structured team reflections and joint exercises that include all professional roles, especially radiographers, and emphasise shared goals, shared knowledge, and mutual respect, can strengthen interdependence. This approach enhances team performance and supports safer, more efficient care.