PT  - JOURNAL ARTICLE
AU  - R Fahrig
AU  - A J Fox
AU  - S Lownie
AU  - D W Holdsworth
TI  - Use of a C-arm system to generate true three-dimensional computed rotational angiograms: preliminary in vitro and in vivo results.
DP  - 1997 Sep 01
TA  - American Journal of Neuroradiology
PG  - 1507--1514
VI  - 18
IP  - 8
4099  - http://www.ajnr.org/content/18/8/1507.short
4100  - http://www.ajnr.org/content/18/8/1507.full
SO  - Am. J. Neuroradiol.1997 Sep 01; 18
AB  - PURPOSE To evaluate the potential use of a C-arm mounted X-ray image intensifier (XRII) system to generate three-dimensional computed rotational angiograms during interventional neuroradiologic procedures.METHODS A clinical angiographic system was modified to allow collection of sufficient views during selective intraarterial contrast injections for CT reconstruction of a 15 x 15 x 15-cm3 volume. Image intensifier distortion and C-arm instabilities were corrected by using image-based techniques. The impact of the pulsatile nature of the vessels during image data acquisition and of the presence of bone on the 3-D reconstructions was investigated by generating 3-D reconstructions of an anesthetized 20-kg pig and of a human skull phantom.RESULTS A sequence of images sufficient for 3-D reconstruction was acquired in less than 5 seconds. Image intensifier distortion and C-arm instabilities were corrected to subpixel accuracy (0.035 mm and 0.07 mm, respectively). Both the intracranial vessels of the pig and the small, high-contrast structures in the skull were reconstructed with negligible artifacts.CONCLUSIONS Using a C-arm mounted XRII system, computed rotational angiography can provide true 3-D images of diagnostic quality.