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Calibration of the standard unit of X-ray CT density from Hounsfield units to volumetric bone mineral density (vBMD) was conducted.
This is because of relatively low areal density (i.e. relatively small collecting area per unit mass) of X-ray mirrors.
Figure 5(a) presents the result when the unit cost of X-ray uniformly varied between USD 2 and 6.
To be noted, digital X-ray technologies could substantially reduce the unit cost of X-ray (without printing the films), and substantially expand the potential of X-ray screening for ACF.
However, it requires context-specific analysis because the cost-effectiveness of Strategy 3 appears sensitive to the unit cost of X-ray which varies among different countries and localities.
The cost per case detected for strategies 3, 4 and 5 was sensitive to the unit cost of X-ray which generally ranges between USD 2 and USD 6, in accordance with the country context.
Hounsfield units (HU) are a measure of X-ray attenuation in CT images.
This should include design and operation of X-ray cine angiographic units, basic radiation physics, radiation quality assurance, and an understanding of the biological risks from radiation exposure so as to minimise radiation exposure to the patient and catheterisation laboratory staff.
In 2002 the total number of X-rays performed in patients at our unit was 2,306, which corresponds to the approximate number of inserted CVCs at that time, since a confirmatory X-ray was routine.
The analysis of x-ray diffraction images illustrates that the elementary structural unit is a tetrahedron.
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CEO of Professional Science Editing for Scientists @ prosciediting.com