CTMRI

CTMRI is a term used to describe either an integrated computed tomography (CT) and magnetic resonance imaging (MRI) system or a workflow that combines CT and MRI data for unified interpretation. The goal is to provide complementary information from both modalities in a way that enhances diagnostic accuracy and potentially streamlines patient care.

CT delivers rapid cross-sectional images with excellent visualization of bone, calcifications, and acute hemorrhage. MRI offers superior soft tissue contrast and a range of functional and advanced sequences, such as diffusion-weighted imaging, perfusion imaging, spectroscopy, and functional MRI. By combining these strengths, CTMRI aims to deliver comprehensive anatomical and tissue characterization, which can support diagnosis, treatment planning, and response assessment in a single encounter or through precise data fusion.

Technical realization faces significant challenges. True integration requires MRI-compatible CT components and careful shielding to prevent interference from the strong magnetic field. In practice, many centers employ sequential imaging on separate scanners with advanced software to co-register and fuse the images. Safety considerations include minimizing radiation exposure from CT, ensuring MRI safety for patients with implants, and appropriate use of contrast agents.

Applications are broad, including neurology (stroke assessment, tumor delineation), oncology (tumor margins and treatment planning), trauma evaluation, and musculoskeletal and spine imaging. Potential advantages include improved diagnostic confidence, more efficient workflows, and better-informed treatment decisions due to the combination of detailed bone and soft-tissue information.

Limitations include limited commercial availability of fully integrated systems, higher upfront and operating costs, longer scan times, and the need to manage both radiation and MRI safety concerns. Research continues toward more widespread adoption and improvements in co-registration, artifact reduction, and workflow efficiency.