For all tests, when the power is on, the initial state of the curvetracer is assumed to be as follows.
对于所有的测试，当电源上，曲线的示踪剂的初始状态是假设如下。
2
The renal parenchymal ROI: drawing a closed curve excluding the renal pelvis detentioned the radioactive tracer.
肾实质ROI：沿肾皮质外缘亦勾画一个闭合的曲线，不包括有示踪剂滞留的肾盂。
3
This paper introduces a practiced method of calculating the tracer contour data of YX-173A cam milling machine from the discrete curve of brake cam contour, based on the copying principle.