• With 2 grades, based on the area of the dural sac – absolute (area below 75 mm2) and relative (area between 75 – 100 mm2) stenosis;
• With 2 grades, based on the diameter of the canal – absolute (diameter less than 10mm) and relative (diameter between 10 and 12 mm) stenosis;
• With 3 grades, based on the area of the dural sac – severe (area below 75 mm2), moderate (area between 75 – 87 mm2) and mild (area between 88 – 100 mm2) stenosis.
All of the abovementioned limits can be changed by the user.
(2) Select what to take into account and to include in the report:
• absence of stenosis on all levels
• reduced canal diameter (sagittal)
• do not report stenosis if there is dural sack compression caused by a herniation