Singh M, Marshall V, Blandy J
Br J Urol. 1975 Apr;47(2):125-9. doi: 10.1111/j.1464-410x.1975.tb03931.x.
A study of the observer error built in to contact preoperative radiography for renal stones shows that particles less than 2 mm in diameter are likely to be missed. The radiographic follow-up of 100 patients from whom 120 large staghorn calculi have been removed over a period of up to 10 years shows that new calculi may form in kidneys which have been completely cleared, and that residual stones do not always grow, but equally often pass spontaneously, or remain unchanged.
一项关于术前肾脏结石接触式放射成像中观察者误差的研究表明，直径小于2毫米的结石颗粒很可能被遗漏。对100例患者进行长达10年的放射学随访，这些患者共取出120颗巨大鹿角形结石，结果显示，在结石已被完全清除的肾脏中可能会形成新的结石，而且残余结石并非总是会增大，而是同样经常会自行排出或保持不变。
