Tailored low dose three-dimensional CT of paranasal sinuses.
A technique for three-dimensional (3D) computed tomography (CT) of the paranasal sinuses was evaluated. The influence of milliamperage and reconstruction algorithms on image quality was studied in a phantom. Eleven patients with bony abnormalities of the paranasal sinuses underwent CT to assess the clinical impact of 3D CT protocol. Contiguous 1.5-mm sections obtained at 120 kVp/175 mA/1.9 sec can provide 3D images with high diagnostic image quality. This technique offers the advantage of a much lower dose than that of the conventional CT (CCT) examination of paranasal sinuses. Three-dimensional CT protocol of paranasal sinuses is suggested for use for the evaluation of bony abnormalities and for preoperative planning of the above region.
Department of Medical Physics, University of Crete, Iraklion, Greece.
J
J
Damilakis
P
P
Prassopoulos
M
M
Mazonakis
J
J
Bizakis
E
E
Papadaki
N
N
Gourtsoyiannis
D006801:Humans; D007223:Infant; D010254:Paranasal Sinus Diseases / Q000000981:diagnostic imaging; D010255:Paranasal Sinus Neoplasms / Q000000981:diagnostic imaging; D010256:Paranasal Sinuses / Q000000981:diagnostic imaging*; D019047:Phantoms, Imaging; D011829:Radiation Dosage; D011856:Radiographic Image Enhancement / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods*