Image Enhancement Technology

Example - DF femoral artery

ROI centred on femoral artery.

	Original DF image + Region Of Interest (ROI)
	7x ROI before enhancement
	7x ROI before enhancement with edges marked
	7x ROI after enhancement with edge-dots removed
	7x ROI after enhancement with edges marked and measurements indicated (for measurements, see below)

The absolute measurements via the calibration by a standard wire are:

• Diameter of .035J wire = 2.29 ± .02 pixels (=> 0.89mm)
• Normal patient vessel lumen diameter = 13.29 ± .02 pixels => 5.17 ± .01mm
• Patient vessel within stenosis cleared of blockage = 5.29 ± .02 pixels => 2.06 ± .01mm
• Stenosed vessel lumen diameter = (13.29 - 5.29) ± .04pixels => 3.11 ± .02mm
• Percentage diameter stenosis of superficial femoral artery = 3.11/5.17 => 60.15 ± 0.84%

Before and after enhancement, side-by-side:

'before'	'after'

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