Sentence examples for mean attenuation values from inspiring English sources
Mean attenuation values were taken as an average of the mean Hounsfield numbers over these same areas of subcutaneous fat.
The most accurate mean attenuation values for tissues around a TKR were obtained with a CT gantry using 10° to 15° anteroinferior to posterosuperior angulation.
Table 1 shows the average quantitative values for the image noise, mean attenuation values and contrast-to-noise ratio of three different reconstruction algorithms.
No significant differences were seen when comparing mean attenuation values for each method (P > 0.05 with non-overlapping 95%% CI); see Fig. 1.
Linear attenuation coefficients were 0.095 cm−1 for water and 0.026 cm−1 for the lung insert (same as the mean attenuation values derived from the low-dose CT scan used for AC of mCT data).
Objective [mean image noise, contrast-to-noise ratio (CNR) for kidney and mean attenuation values of subcutaneous fat] and subjective image parameters (image noise, image contrast, overall visibility of kidneys/ureters/bladder, visibility of small structures, and overall diagnostic confidence) were assessed using a scoring system from 1 (best) to 5 (worst).
Additionally, the mean attenuation value of a representative spherical volume-of-interest (VOI) in the right forearm (diameter: 20 mm) was determined.
We report the mean attenuation value in the sarcoma and the relative difference of a ROI (30% of max isocontour in the sarcoma) activity values for (A -(B) in reference to (C).
The mean attenuation value in the sarcomas was 2-82-8%gher in DWFS (μ = 0.1 cm-1) compared to FullCT (μ = 0.0926-0.098 cm-1) for the voxels not considered bone.
Inside the ROI, placed in the coronal slice on the case study patient with inversion in only one leg (Figure 2 E,F,G), the mean attenuation value in the Dixon image was 10% lower in the inverted leg ROI (μ = 0.09 versus 0.1 cm−1) while the CT had the same attenuation value in both ROIs (μ = 0.099 cm−1).
The use of sharper convolution filters produces an increase in the mean attenuation value of the calcified component of plaque.
