|Jay Vaishnav, PhD
Clinical Scientist, Manager, Medical Affairs
Canon Medical Systems USA, Inc.
Figure 1 Regions of interest extracted from images of the Catphan® 600 phantom low-contrast module, without (left) and with (right) PUREViSION technology (Aquilion ONE on the left; Aquilion ONE / GENESIS Edition on the right). Both images were obtained at similar CTDI values (left: 58 mGy, right: 59 mGy) and reconstructed with AIDR 3D. At similar CTDI, the PUREViSION image shows improved low-contrast detectability, with more of the simulated lesions visible on the PUREViSION images.
Figure 2 The introduction of AIDR 3D and FIRST iterative reconstruction has pushed imaging systems to ultra-low photon counts. This acquisition, with a nodule clearly visible in the axial view, was obtained at 2.5 CTDI, 98.9 DLP, or 1.38 mSv. PUREViSION technology reduces noise while maintaining high image quality.
Figure 3 This image shows a lung phantom imaged with conventional (left, Aquilion ONE / ViSION Edition) and PUREViSION (right, Aquilion ONE / GENESIS Edition) technology. Streak artifact reduction is visible in the inset. These are helical scans, obtained at the following parameters: Helical, 120 kV, AEC (SD7@5 mm, FC13, AIDR 3D Standard) , 0.5 s/r , 0.5 mm × 80, HP111, 350 mmΦ, FC03, AIDR 3D OFF, CTDIvol 6.7 mGy. Display parameters: WW=300, WL=30.
Figure 4 These images obtained without (left) and with (right) PUREViSION show similar image quality, at approximately half the CTDI; the left image was obtained at CTDI of 13.9 mGy; the right image at 7.2 mGy. The images were reconstructed at 5 mm slice thickness, with AIDR 3D Mild (FC 52) SD 10. Images courtesy of Fukuoka Wajiro Hospital, Japan.
Figure 6 CTA of aorta, without (Left) and with (Right) PUREViSION Optics.