参考
Lal, Hira, et al. "Perirenal fluid collection in renal parenchymal disease: the kidney sweat sign." Abdominal Radiology 6.42 (2017): 1809-1810
Yassa, N. A., Peng, M. I. N. G., & Ralls, P. W. (1999). Perirenal lucency (" kidney sweat"): a new sign of renal failure. AJR. American journal of roentgenology, 173(4), 1075-1077