EFFECT OF PERFUSION ON EXERCISED MUSCLE - MR IMAGING EVALUATION

被引：62

作者：

ARCHER, BT ^{[1
]}

FLECKENSTEIN, JL ^{[1
]}

BERTOCCI, LA ^{[1
]}

HALLER, RG ^{[1
]}

BARKER, B ^{[1
]}

PARKEY, RW ^{[1
]}

PESHOCK, RM ^{[1
]}

机构：

[1] UNIV TEXAS,SW MED CTR,DEPT RADIOL,5171 HARRY HINES BLVD,DALLAS,TX 75235

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1992年 / 2卷 / 04期

关键词：

MUSCLES; RELAXOMETRY; VASCULAR STUDIES;

D O I：

10.1002/jmri.1880020409

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

An ischemic clamp model of exercise was used to evaluate the potential role of blood flow in mediating changes in the magnetic resonance imaging appearance of skeletal muscle. Proton relaxation times of muscle were serially estimated in 10 healthy subjects (a) before exercise, (b) after exercise in the presence of vascular occlusion (VO1), (c) during vascular reocclusion after 1 minute of reperfusion (VO2), and (d) after reinstitution of continuous flow. T1 and T2 of active muscles were increased during VO1. During VO2, there were additional increases in relaxation times of active muscles. Reinstitution of continuous flow was associated with a continuous decrease in the T2 of exercised muscle. Hence, blood flow was not required for increases in TI and T2 with exercise. Additional relaxation time increases occurred after a brief period of reperfusion; however, continuous flow was associated with a decrease in T2.

引用

页码：407 / 413

页数：7

共 33 条

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