fluoroscopicomografie

Fluoroscopicomografie, also known as fluoroscopic tomography or fluoroscopic tomography, is a radiological imaging technique that aims to produce cross-sectional images of the body by combining fluoroscopy with tomographic reconstruction. The method uses fluoroscopic projections acquired from multiple angles or positions around the patient and reconstructs a series of parallel image slices corresponding to a defined depth.

In practice, the X-ray source and/or detector rotate or move around the patient during fluoroscopic data acquisition. The collected projections are processed with reconstruction algorithms, such as backprojection or filtered backprojection, to generate a stack of slices. The depth of a given reconstructed plane is determined by the geometry of the acquisition and the motion parameters; structures outside the selected plane appear blurred, while in-plane features are rendered with greater clarity.

Historically, fluoroscopic tomography emerged in the mid-20th century as an attempt to obtain sectional information before the advent of computed tomography. With the rapid development of CT, routine use declined. Variants of the technique have persisted or evolved into related methods, such as digital tomosynthesis and cone-beam imaging, which provide tomographic information in fluoroscopy-guided settings.

Applications of fluoroscopicomografie include localization of lesions, guidance for biopsies or injections, and functional or dynamic assessments in selected anatomical regions. Modern practice more commonly employs digital tomosynthesis for limited-angle imaging and cone-beam CT in interventional suites, which share the core principle of reconstructing slices from multiple projections.

Advantages of the approach include real-time capability and potentially lower radiation dose for certain protocols, while limitations involve limited depth resolution, motion artifacts, lower contrast resolution compared with CT, and the need for precise geometric calibration.