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AJNR - American Journal of Neuroradiology

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Volumetric Perfusion CT Using Prototype 256–Detector Row CT Scanner: Preliminary Study with Healthy Porcine Model^V

Shinichiro Mori^a, Takayuki Obata^b, Naoshi Nakajima^c, Nobutsune Ichihara^d and Masahiro Endo^a

^a Department of Medical Physics, National Institute of Radiological Sciences, Chiba, Japan
^b Department of Medical Imaging, National Institute of Radiological Sciences, Chiba, Japan
^c Shimodate Animal Hospital, Ibaraki, Japan
^d Laboratory of Anatomy, School of Veterinary Medicine, Azabu University, Kanagawa, Japan

View larger version (57K): [in a new window]   FIG 1. 3D volume rendering beginning 15 seconds after the start of injection (A) with and (B) without cranial bones. C, Shown 7 seconds after the start of injection. D, Slightly enhanced visualization of the superior sagittal sinus and inferior sagittal sinus (arrow) increasing gradually from 12 seconds after the start of injection. E, Optimum visualization of the superior sagittal sinus and inferior sagittal sinus 16 seconds after the start of injection. F, Decrease in enhancement of the superior sagittal sinus at 25 seconds after the start of injection. 1, dorsal cerebral veins; 2, carotid artery; 3, transverse facial artery; 4, sagittal venous sinus; 5, lingual artery; 6, caudal auricular artery; 7, infraorbital artery; 8, ophthalmic venous sinus; 9, supraorbital vein.

View larger version (54K): [in a new window]   FIG 2. Results for a healthy domestic pig (pig 1). A, Nonenhanced sagittal image with a 6-mm section thickness. B, CTA in the sagittal plane at 14 seconds after the start of contrast injection. Various color ramps, selected according to user preference, were used to display the sagittal perfusion CT maps of (C) CBF, (D) CBV, and (E) MTT. These perfusion CT maps show enhancement of the lingual artery and vein in addition to the brain.

View larger version (36K): [in a new window]   FIG 3. Results for a healthy domestic pig (pig 2). A, Nonenhanced sagittal image with a 6-mm section thickness. B, Oblique image at a 40° angle to the horizontal line shown in Fig 2A. C, CTA in an oblique plane at 14 seconds after the start of contrast injection. D, CBF. E, CBV. F, MTT.