The great number of subjective and descriptive characteristics of the chronic cerebral ischemia (CCI) arise a question of development of magnetic-resonance tomographic (MRT) criteria for CCI in relation to its genesis (hypertonic and atherosclerotic).

Concretization of MRT features of CCI in relation to its genesis.

MRI investigation was performed in 77 patients with CCI of average age 58,2±0,6 years. Patients were divided into 2 groups. Group 1 included 31 patients with CCI of hypertonic genesis, group 2 consisted of 46 patients with CCI of atherosclerotic genesis. M

Ischemic focuses were found subcortically in 22 (71,0%), periventricullary – in 9(29,0%) patients of group 1, in group 2 – in 18(39,1%) and 28(60,9%) P<0,01, respectively. In group 1 the single focuses were in 2(6,5%) patients, few – in 10(32,3%) and multiple – in 19(61,3%) patients. In patients of group 2: single – in 14(30,4%), few – in 21 (45,7%) and multiple – in 11(23,9%). The small sites were diagnosed in 13(41,9%) patients of group 1 and in 34(73,9%) in group 2 (P<0,01). The large sites were found in 18(58,1%) and 12 (26,1%) P<0,01, respectively. The total area of of leusoareosis in regimen T2 was 8,6±1,2cm2 in group 1, and 3,5±0,5 cm2 in group 2.

MRT picture of CCI of hypertonic genesis was characterized by multiple, large focuses, predominantly cubcortically distributed, by diffusive-confluent leucoareosis. MRT findings of atherosclerotic genesis were differed by small periventricular areas and local leucoareosis.