7-2 Vascular
7.3 Vascular Measurement Tools
Vascular measurements are mainly used for carotid, cerebral, upper and lower extremities vessels.
The system supports the following 2D and Doppler vascular measurements.
NOTE: Measurement tools mentioned below are configured in the system. The application
measurement packages provided in this system are generally different combinations of
measurement tools.
2D Vascular Measurements
Types Tools Descriptions Methods or formulae
Measurement
CCA IMT
Common Carotid
Artery IMT
ROI measurement in IMT
Bulb IMT Bulbillate IMT
ICA IMT
Internal Carotid
Artery IMT
ECA IMT
External Carotid
Artery IMT
Calculation
Stenosis D Stenosis Diameter
Stenosis D (No unit) = (Normal Diam(cm) –
Resid Diam (cm)) / Normal Diam (cm) ×
100%
Stenosis D (No unit) = |（D1-D2）/MAX
（D1，D2）|*100%
Where, D1 and D2 refers to the measured
vascular diameter, and MAX（D1，D2）
represents the larger value of the two.
Stenosis A Stenosis Area
Stenosis A (No unit) = |（A1-A2）/MAX
（A1，A2）|*100%
Where, A1 and A2 refers to the measured
vascular area, and MAX（D1，D2）
represents the larger value of the two.
Study IMT
Intima-Media
Thickness
See below
Doppler Vascular Measurements
Types Tools Descriptions Methods or formulae
Measurement
CCA Common Carotid Artery
D trace in General D measurements
Bulb Bulbillate
ICA Internal Carotid Artery
ECA External Carotid Artery
Vert A Vertebral Artery
Innom A Innominate Artery
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