Abstract: The present invention based on not changing hardware design, which means that each imaging detector keep independent considerations, the weighted value of the circuit to be pushed back the weight of the original signal, and then estimate the amount of the original signal in a virtual cascade circuit to renew weighted signal; this estimation process through simplification, only simple addition and multiplication calculations on real numbers need to be implemented. Advantage of the present invention is that the signal data through a simple operation will complete the estimate. Executing the estimate in hardware without increasing storage capacity of the rear-end list mode data, and also to achieve a continuous and effective imaging area to expand and enhance the probe's sensitivity and keep a higher signal to noise ratio (S/N ratio).

Abstract: A digital apparatus is provided for monitoring environment. The apparatus has a high-pressure chamber easy in maintenance. By using a supporting unit, the chamber is stably set in a container. In addition, the supporting unit reduces problem of saturated-humidity absorption so that wastage of utilities and rate of fake signals are both decreased. Thus, the chamber is prevented from mist and vapor for keeping good function.