Dynamic susceptibility contrast imaging

FIGURE 2.6 Dynamic susceptibility contrast imaging. Axial images of the brain are acquired repeatedly, in this case every 1.5 seconds. As a bolus of intravenously injected contrast material enters the brain, first arteries, then brain parenchyma, and finally veins demonstrate a transient loss of signal intensity. In this acute stroke patient, hypoperfusion of the left middle cerebral artery territory results in delayed arrival of the contrast bolus and prolonged stasis of contrast within the tissue. 

Fig. 8.1 Dynamic susceptibility contrast images. These images were acquired during the injection of a bolus of gadolinium. Parenchymal signal intensity decreases as the bolus passes through the microvasculature, then increases again as the bolus washes out. Note that there is an area of severely diminished cerebral blood flow thick arrows), which demonstrates virtually...

Fig. 8.2 Perfusion maps. These images were generated from the dynamic susceptibility contrast images shown in Fig. 8.1, using the postprocessing method summarized in Fig. 8.4. In the region of severely impaired perfusion (thick arrows), abnormally low cerebral blood volume (CBV) and flow (CBF) are represented by darker shades of gray on the corresponding...

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Sequences for Dynamic Susceptibility Contrast-Enhanced Imaging 104... 

Fig. 6.1. Source images of a dynamic susceptibility contrast-enhanced series in a healthy volunteer, acquired 20-50 s after bolus injection during the bolus passage the signal decrease in gray matter is more prominent than that in white matter. After the bolus passage, the signal returns to normal...

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Figure 2 Brain axial spin-echo Tj-weighted image (A) and sequential dynamic susceptibility-contrast in a patient with a right infarct (B).

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