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In interventional neuroradiology, three-dimensional rotational digital subtraction angiography (3D-DSA) is very useful for the spatial grasp of the location and size of an intracranial cerebral aneurysm. The purposes of this study were to evaluate the property of three-dimensional image dependence on the respective field of view (FOV) size in a flat-panel detector (FPD) using vessel phantoms, and to optimize clinically. The indices of three-dimensional image properties such as profile curve (FWHM, FWTM), digital value, and image noise were evaluated using a vessel phantom with a different diameter. As a result, in the case of a 6-inch FOV size of the FPD, the relative diametral rate of change from the actual value of the vessel phantom was least for all FOV sizes. This study demonstrated that the difference in FOV size in 3D-DSA affects the three-dimensional object's reproducibility. Furthermore, as for this 3D-DAS system, three-dimension images such as a VR image might be processed more faithfully, since an FOV size of 6 inches has the highest reproducibility of objects.

Evaluation of FOV Size on Cerebral Three-dimensional Rotational Digital Subtraction Angiography with Flat Panel Detector System