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Modalities

Every way of making an image

Each modality answers a different question. The cases below are real studies on each; pick a modality, or a region of the body, and read.

  1. 01 / 82 cases

    X-ray

    Projection. Pattern. Structure.

    The projection: everything in the beam, superimposed. The systematic sweep, the silhouette sign, and what a line means.

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  2. 02 / 43 cases

    CT

    Density. Windows. Anatomy.

    Density in slices. Windows decide what you see; scrolling decides what you find. Blood, brain, bone, and beyond.

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  3. 03 / 3 cases

    MRI

    Signal. Sequences. Pattern.

    Signal rather than density. Sequences that each answer a different question: T1, T2, FLAIR, diffusion.

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  4. 04 / 21 cases

    Ultrasound

    Probe. Plane. Motion.

    Point-of-care and diagnostic ultrasound, still and cine. The probe, the plane, the motion, and the artefacts that mislead.

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