Three-dimensional CT with a modified C-arm image intensifier: feasibility.
A portable C arm was modified for cone-beam computed tomography (CT). This three-dimensional (3D) CT imaging system facilitated the acquisition of fluoroscopic images during a 190 degrees rotation and computed a 3D data cube (matrix, 256 x 256 x 256; scanning time, 100 seconds) with multiplanar image reformation. The high-contrast resolution, 0.9 line pairs per millimeter, was comparable; the low-contrast resolution, minimal; and the radiation dose, 60%-80% lower, as compared with these parameters at spiral CT. The normal anatomy of small joints could be depicted, and the osteosynthesis screws in the talus were correctly identified.
Linsenmaier
Ulrich
U
Department of Radiology, Klinikum der Universität München, Innenstadt, Ludwig-Maximilians-Universität München, Nussbaumstrasse 20, D-80336 Munich, Germany. lin@ch-i.med.uni-muenchen.de
Rock
Clemens
C
Euler
Ekkehard
E
Wirth
Stefan
S
Brandl
Roland
R
Kotsianos
Dorothea
D
Mutschler
Wolf
W
Pfeifer
Klaus Jürgen
KJ
D001863:Bone Screws; D005240:Feasibility Studies; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D011829:Radiation Dosage; D013628:Talus / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed / Q000379:methods*