CT and MRI fundamentals
CT and MRI provide sectional anatomical information using different physical principles. Choosing a modality balances the clinical question, safety and image characteristics.
Open interactive lesson & self-check ↗CT and MRI fundamentals — learning map
Original conceptual SVG · scalableOriginal schematic relationship map for this topic; relationships are organized for study, not intended as an anatomical depiction or a diagnostic algorithm.
CT acquisition
Computed tomography reconstructs images from multiple X-ray projections; it involves ionizing radiation and is efficient for many emergency questions.
MRI signal
MRI uses a strong magnetic field, radiofrequency pulses and tissue proton behavior to generate contrast without ionizing X-rays.
Contrast and safety
Iodinated CT contrast and gadolinium-based MRI agents have different indications and safety considerations; implanted devices require MRI compatibility assessment.
Interpretation and orientation
Axial, coronal and sagittal reconstructions, CT windows and MRI sequences influence which structures and abnormalities are visible.
Reference and next reading
Explore the original curriculum and publisher-hosted resources for full-depth reading; this note is an original schematic introduction, not an exhaustive chapter.