CTbased

CTbased, often written as CT-based, is an adjective used to describe methods, analyses, or tools that rely on computed tomography (CT) imaging as their primary data source. The term is applied across medicine, radiology, dentistry, and industrial nondestructive testing to indicate that CT data underpin the technique, visualization, or measurement.

Common CTbased applications include radiotherapy planning and dose estimation, where CT numbers translate into tissue density for accurate attenuation calculations; CT-based attenuation correction in PET/CT to improve quantitative imaging; and CT-based segmentation and 3D modeling for surgical planning or patient-specific implants. In research, CTbased radiomics refers to the extraction of quantitative features from CT scans to support diagnosis, prognosis, or treatment response. In industry, CTbased nondestructive testing uses CT-derived reconstructions to inspect internal features without disassembly.

CTbased methods depend on high-quality CT acquisition and proper calibration to convert voxel intensities into physical properties. They are sensitive to artifacts such as patient motion, metal hardware, and beam hardening, and may require harmonization across scanners or protocols when used in multi-center studies. When CT data are integrated with other modalities, accurate image registration and fusion are essential for reliable results. While widely used, CTbased is not a formal standardized term and its precise meaning can vary by field, reflecting different goals such as measurement, visualization, modeling, or quantitative analysis. Related topics include computed tomography, attenuation correction, radiomics, dosimetry, and CT-based segmentation.