X rays were generated from a Pantak unit operating at 200 kVp and 20 mA, with a 0.5 mm copper plus 0.5 mm aluminum filter. A dose rate of 1.0 Gy/min was used. Northern blot analysis Northern blot analysis was performed essentially as described (Daino et al., 2002). After irradiation ...
The low-dose acquisition protocol had 100kVp with 0.1 mAs during each projection. Projections with different mAs settings were also acquired for comparison. The reconstructed image of the phantom was generated with two resolution settings: high resolution CBCT (512 × 512 × 200 voxels as...
For simulated single energy protocols with kVp between 80 and 140, the highest feasible mAs exceeds that of either initial scan. Conclusions: This work describes and validates the synthetic CT theory and algorithm by comparing its results to actual scans. Synthetic CT is a powerful new tool that...
study, we examined 70 consecutive CT urograms (35 men and 35 women; mean age, 58.5 years) performed on a dual-energy CT scanner and compared excretory phase images obtained at 80 kVp and 340 mAs with blended images (0.3 × 140 kVp and 80 mAs; and 0.7 × 80 kVp and 340 mAs). Quan...
Results: Scanning parameters were 120 kVp-140 mAs, 120 kVp-120mAs, and 80 kVp-280 mAs. The CNR was 6.87, 3.36, and 7.66 HU, respectively. Also, the noise of water was 6.83, 7.36, and 9.04 HU respectively. The CT attenuation value for the liver parenchyma, aorta, and fat is high ...
80-kVp CT Using Iterative Reconstruction in Image Space Algorithm for the Detection of Hypervascular Hepatocellular Carcinoma: Phantom and Initial Clinical... To investigate whether the low-tube-voltage (80-kVp), intermediate-tube-current (340-mAs) MDCT using the Iterative Reconstruction in Image Spa...
Two chest CT scans were performed with current time product of 50 and 150 mAs at 120 kVp, with the same scan length with a 16 detector-row CT scanner. Three readers evaluated 52 target lesions and assigned an overall impression score to each target lesion, using a 5 point scale from 1 ...
Figure 4 A 40-year-old man weighing 100 kg underwent pre-operative renal donor protocol computed tomography.Computed tomography (CT) of the abdomen was performed with the following scan parameters; 120 kVp, 86-201 mA, 1.375 pitch and noise index of 25. Non-contrast transverse CT image (A)...
The CT dose index at 80 kVp and 25 mAs or 30 mAs using a 32 cm body phantom was 0.7 mGy or 0.9 mGy. The CT effective dose for each patient ranged from 1.01 to 1.40 mSv. CT analysis The CT data were sent to a dedicated workstation (Extended Brilliance Workspace; Philips ...
The exposure (tube current mA, tube voltage kVp, and exposure length msec) techniques for the standard mammogram and the tomosynthesis exposures can be set manually, or by using automatic methods. If the standard mammogram is taken first, its exposure techniques can be used to set an optimal ...