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. Author manuscript; available in PMC: 2010 Jan 29.
Published in final edited form as: Radiology. 2007 Apr 19;243(3):853. doi: 10.1148/radiol.2433060819

Figure 2.

Figure 2

Three-dimensional contrast-enhanced spoiled gradient-echo MR venographic images (6.5/2.6, 30° flip angle) from (a, b) a healthy volunteer and (c, d) a patient. Sagittal maximum intensity projections from (a, c) nonaccelerated (4 minutes 20 seconds) images show signal intensity and vessel enhancement that are comparable to those in (b, d) corresponding FFA 2D SENSE (65 seconds) acquisitions. All major sinuses and large veins, in addition to smaller vessels including the Labbé and Trolard veins, are equally identified with both techniques. In both studies, the FFA 2D SENSE image was obtained after the second contrast agent injection. Note higher background tissue signal intensity caused by residual contrast agent uptake in the FFA 2D SENSE images. (c, d) MR venographic images in the patient demonstrate changes consistent with sequelae of prior venous thrombosis in the superior sagittal sinus. Note slight blurring of the transverse (short arrow) and sigmoid (long arrow) sinuses in the longer nonaccelerated acquisition in c. This is not observed in the corresponding shorter FFA 2D SENSE image in d. The overall appearance of vessels in d is sharper.