Temperature control system for multi-radiofrequency ablation needles and method therefor

A temperature control system for multiple radio frequency ablation needles, comprising:

• N radio frequency ablation needles, each radio frequency ablation needle being configured with a temperature sensor for detecting a temperature value of the radio frequency ablation needle, wherein N is an integer greater than 1;
• a radio frequency generator, providing radio frequency voltage to the N radio frequency ablation needles;
• an ablation switch array being operable to make or break an electrical connection between designated radio frequency ablation needles of the N radio frequency ablation needles and the radio frequency generator;
• a controller, coupled respectively to the temperature sensors on the N radio frequency ablation needles and the ablation switch array, the controller being configured to:
• obtain N temperature values from the temperature sensors on the N radio frequency ablation needles,
• calculate a dynamical current reference temperature based on the N temperature values,
• determine a current upper temperature limit and a current lower temperature limit based on the current reference temperature,
• control the ablation switch array, such that radio frequency ablation needles with temperature values exceeding the current upper temperature limit are disconnected from the radio frequency generator, and radio frequency ablation needles with temperature values below the current lower temperature limit are connected to the radio frequency generator.