Ishikawa I, Masuzaki S, Saito T, Yuri T, Shinoda A, Tsujigiwa M
Department of Internal Medicine, Kanazawa Medical University, Uchinada, Japan.
Nephron. 1989;51(1):99-102. doi: 10.1159/000185251.
Two cases of renal segmental infarction and 1 case of renal patchy ischemia demonstrated by magnetic resonance imaging (MRI) are reported. MRI of renal infarction in two renal grafts following surgical ligation revealed an area of noncorticomedullary differentiation and an area with a low signal intensity. Renal ischemia in 1 patient with acute renal dysfunction with severe loin pain and patchy renal vasoconstriction was visualized as an ill-defined focus of low signal intensity in the renal cortex, indicating a long T1 relaxation time. Delayed wedge-shaped contrast enhancement was demonstrated on CT scan in the same area. The common finding in renal infarction and ischemia in our cases was the area of low signal intensity on MRI.
报告了2例经磁共振成像（MRI）证实的肾节段性梗死和1例肾斑片状缺血病例。手术结扎后两个肾移植肾梗死的MRI显示出一个无皮质髓质分化的区域和一个低信号强度区域。1例急性肾功能不全伴严重腰痛和肾斑片状血管收缩患者的肾缺血在MRI上表现为肾皮质内界限不清的低信号强度灶，提示T1弛豫时间延长。在同一区域的CT扫描上显示出延迟的楔形对比增强。我们病例中肾梗死和缺血的共同表现是MRI上的低信号强度区域。
