[en] MR angiograms were reconstructed in 54 cases using image data of inversion recovery type three dimensional ultrafast technique. Maximum intensity projection algorithm with selected reconstruction field provided excellent arterial images around the circle of Willis. Although longer TI provided better visualization of the vessels, T₁-contrast of the original images was less. Intravenous Gd-DTPA administration increased flow signal and suggested the possibility of the MR venography while it degraded arteriograms. High fat signal and saturation effect of the flow in peripheral region were critical problems, requiring further technical improvement. This method could provide 3D MR angiograms without need for further examination time, nevertheless it is not superior to usual gradient echo MRA. (author)