Bolus Tracking
A contrast front travels down the vessel into the monitoring region and the density curve climbs past the trigger rule, arming the scan.
CSS
Imaging
15 animationsCoincidence Ring
Opposing detector blocks on the PET ring light in pairs and the chords they draw accumulate until they intersect on a single uptake focus.
CSSCollimator Field
Four collimator jaws travel inward from a wide open field to frame the region of interest, and the exposed rectangle closes down with them.
CSSCompression Paddle
The compression paddle descends onto the tissue wedge, flattening it to an even slab while the thickness gauge falls to its held reading.
CSSDoppler Gate
The sample gate steps along the vessel onto the flow jet and the spectral trace below changes from a flat baseline into a pulsatile envelope.
CSSFiltered Backprojection
Projection bands sweep across the reconstruction field at successive angles and the streaked centre resolves into a sharp-edged object.
CSSHelical Acquisition
The tube and detector pair orbit the gantry ring while the couch advances through the bore, lighting each slice tick along the body axis in turn.
CSSImage Fusion
A functional frame drifts into register over the anatomical frame and the residual misalignment bar shrinks to nothing as the two lock together.
CSSInversion Recovery
Two tissue recovery curves climb from full inversion while the read-out line slides to the inversion time where one curve crosses zero and its tissue swatch goes dark.
CSSK-space Fill
Raster lines fill the k-space panel from the centre outward while the resolution phantom beside it separates from merged blocks into distinct line pairs.
CSSProjection Exposure
A cone beam from the X-ray tube passes through a stepped phantom and the detector's attenuation profile rises from a flat baseline into the stepped density read-out.
CSSSector Sweep
An ultrasound beam sweeps the sector while the returned echo interfaces fill in from shallow depth to the far field.
CSSSlice Scrub
A stack of axial slice rules is scrubbed by a moving index and the selected slice lifts clear of the stack into the viewport.
CSSSpin Echo
Spin vectors fan apart after the excitation pulse, a refocusing pulse flips the fan, and they re-converge as the echo envelope swells on the read-out axis.
CSSWindow and Level
A window bracket narrows across the attenuation histogram and the grey transfer ramp beneath it pivots from a shallow slope to a steep one inside the window.
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