ct

Verse 1 – Introduction CT scans our body slice by slice, Cross‑section images, looking nice. Tomo means cut, graphy means a pic, Scan from angles, slice by slice real quick. Axial, sagittal, coronal too, Oblique plane shows a different view. Verse 2 – Localizer Image Before the scan we take a scout, Topogram or scanogram, no doubt. Sets the range and slice width right, Patient positioning in plain sight. Spiral mode is something else, Not a localizer, just a scan itself. Verse 3 – Image Quality Spatial resolution shows the small, Edges sharp, details we recall. Low‑contrast lets soft tissues show, Temporal speed reduces motion flow. High quality images we create, CT scanning is really great! Verse 4 – Pixel, Voxel, Matrix Pixel’s 2D, height and width we see, Voxel adds Z, a volume to be. Matrix is rows and columns neat, Slice thickness on Z‑axis complete. Thinner slices, clearer view, Volume averaging lessens too. Verse 5 – Beam Attenuation X‑ray beam loses power inside, Absorption and scatter cannot hide. Thickness, density, atomic number, High attenuation makes bones encumber. Air is dark, bone is bright, Fat and soft tissue somewhere in light. Verse 6 – Linear Attenuation & HU Linear μ tells us how much we lose, Higher density makes beam reduce. Hounsfield units show numbers clear, Air is minus, water zero near. Soft tissue thirty to eighty plus, Bone a thousand, metal’s a fuss! Verse 7 – Polychromatic Beam X‑ray beam has photons many, Low‑energy absorbed, high ones plenty. Beam hardening streaks can appear, Dark lines in dense bones near. Verse 8 – Data & Reconstruction Raw data comes from detectors first, Image data shows pixels rehearsed. Prospective, retrospective reconstruct, Ready for display, now we instruct. Verse 9 – Scan Modes Step‑and‑shoot moves and stops, Helical spins, table never drops. MDCT has rows multiple, Thin slices fast, details simple. Verse 10 – Imaging Planes Axial top to bottom, sag is side, Coronal shows front‑back wide. Oblique angled as we choose, Directional terms we never lose. Verse 11 – Reconstructions & Clinical MPR, 3D, volume render bright, Curved reformats show vessels right. CT biopsy, angiography too, Lung, bone, vascular imaging view. Final Verse – Summary CT gives us slices so fine, Low‑contrast soft tissue shine. Pixels, voxels, HU to know, Beam and artifacts in the flow. Remember all these basic ways, CT imaging saves the days!