An endoscopic system may include an endoscopic device and a control apparatus. The device may include a housing membrane having a distal end and a transparent outer layer around a periphery of the housing membrane and extending longitudinally from the distal end to define a side volume of interest, and an optical infrared sensor array comprising infrared sensors extending longitudinally along and circumferentially about a longitudinal axis of the device to detect infrared radiation over the side volume. The control apparatus may include a processor and a computer-readable medium having computer-executable instructions that cause the processor to, determine temperature data for the side volume in response to infrared data from the infrared sensor array, determine if the temperature data is in a temperature region of concern in a vessel, and provide a temperature control signal to a subsystem to instruct the subsystem to reduce temperature in the vessel.
