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Right cerebellar developmental venous anomaly (DVA)

Cerebellar DVA, 0.5T

Fig.1 Sagittal non-enhanced T1-weighted spin-echo images.
Irregular low signal intensity areas in the right cerebellar hemisphere.
Fig.2 Transverse proton density and T2-weighted fast spin-echo images. The caput medusae presents here as an essentially hyperintense area (yellow arrows), whereas the transcerebellar collector is signal void (blue arrows). This appearance is almost pathognomonic for DVAs.
Fig.3 Transverse source images from a Gadolinium-enhanced single slab 3D TOF sequence. Both the caput medusae and the transcerebellar collector are clearly seen.
Fig.4 Transverse, rotated targeted MIP reconstructions from the Gadolinium-enhanced single slab 3D TOF data set. The large DVA is eventually drains into the right transverse sinus via the superior petrosal sinus.
Fig.5 Sagittal and coronal (below) targeted MIP reconstructions from the Gadolinium-enhanced single slab 3D TOF data set. Same information as above.
Fig.6 Transverse source images from a Gadolinium-enhanced 3D PC acquisition. Same information as Fig.3.
Fig.7 Sagittal and transverse targeted MIP reconstructions from the Gadolinium-enhanced 3D PC data set (Venc:15 cm/s). The DVA is clearly identified, however this technique apparently provides less morphological detail of slow flow components, such as the caput medusae. Note, however, that on this MR system the lowest selectable Venc value was 10 cm/s at the time of the examination. With current technology, Venc values as low as 1 cm/s are available.

 

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Fig. 1

Right cerebellar developmental venous anomaly (DVA), Fig. 1
Right cerebellar developmental venous anomaly (DVA), Fig. 2
Right cerebellar developmental venous anomaly (DVA), Fig. 3
Right cerebellar developmental venous anomaly (DVA), Fig. 4
Right cerebellar developmental venous anomaly (DVA), Fig. 5
Right cerebellar developmental venous anomaly (DVA), Fig. 6
Right cerebellar developmental venous anomaly (DVA), Fig. 7