Siemens ACUSON Cypress

Vascular Calculations
7-20 ACUSON Cypress™ Operator’s Manual
IMT Formulas
IMT References
1. Burke, G.L., Evans, G.W., Riley, W.A., Sharrett, A.R., Howard, G., Barnes, R.W.,
Rosamond, W., Crow, R.S., Rautaharju, P.M., Heiss, G., Arterial wall thickness is asso-
ciated with prevalent cardiovascular disease in middle-aged adults: the Atherosclerosis
Risk in Communities (ARIC) study. Stroke, 1995; 26:386-391.
2. Stein, J.H., Korcarz, C.E., Mays, M.E., Douglas, P.S., Palta, M., Zhang, H., LeCaire,
T., Paine, D., Gustafson, D., Fan, L., A Semiautomated Ultrasound Border Detection
Program That Facilitates Clinical Measurement of Ultrasound Carotid Intima-Media
Thickness. Journal of the American Society of Echocardiography, 2005; 18 (3):244-
251.
3. Riley, W.A., Evans, G.W., Sharrett, A.R., Burke, G.L., Barnes, R.W., Variation of
common carotid artery elasticity with intimal-medial thickness: the ARIC Study. Ath-
erosclerosis Risk in Communities. Ultrasound Med Biol., 1997; 23 (2): 157-164.
4. Howard, G., Sharrett, A.R., Heiss, G., Evans, G.W., Chambless, L.E., Riley, W.A.,
Burke, G.L., Carotid artery intimal-medial thickness distribution in general populations
as evaluated by B-mode ultrasound. ARIC Investigators. Stroke, 1993 Sep; 24 (9):
1297-1304.
TABLE 37. IMT Formulas
Type Formula Units
IMT Mean
Distance
is the mean distance.
is the distance between outer border and inner border.
mm
IMT Standard
Deviation
is the mean distance.
is the distance between outer border and inner border.
mm
D
1
N
---- D
i
i 1=
N
∑
=
D
D
i
S
N 1–
1
N 1–
------------- D
i
D–()
2
i 1=
N
∑
=
D
D
i