A portable electronic dosimeter is described that comprises a plurality of detectors each configured to detect a type of ionizing radiation, wherein each detector is associated with an amplifier configured to produce an output in response to a plurality of detected photons of the ionizing radiation and an event counter configured to produce one or more counts in response to the detected photons of the ionizing radiation over an integration time; and a processor configured to receive the one or more counts from each of the counters and determine if there is coincidence of the one or more counts of all the detectors, wherein if there is coincidence the processor is configured to provide an over range alarm signal.

A mobile audio mesh distribution (MAD) system/method allowing synchronized audio distribution to modular audio modules (MAMs) and/or drone delivery aircraft (DDA) in mesh audio network (MAN) is disclosed. The system/method utilizes a computer control system (CCS) that communicates wirelessly using a plurality of RF transceivers (RFT) over a RF mesh network (RMN) with one or more MAM that are configured to independently communicate with each other and automatically determine if audio updates are required from the CCS. The MAM are configured to query other MAMs in the RMN to determine if a connected MAM has updated audio/text (UAT), and if so, to download the UAT and schedule audio playback on a speaker. Messages may be transmitted to the MAM in the event of an emergency, terrorist event, or a physical event detected (PED) using prerecorded or updated audio that trigger immediate or scheduled playback by the MAM.

The present invention provides the components and system for a self-assembling hardened network which will function without other infrastructure by creating a time-evolving map of the radiation dose and doserate. Other environmental sensors for additional purposes can be added to it. The network offers simple electronic applications able to be run on a hand held electronic device, with base station or booster elements and/or, the cell network in conjunction with a radiation detector to provide stay time and health hazard decision making support to individuals in unknown or varying radiation fields. This capability will survive prompt and fallout features of nuclear disasters, as well as other environmental issues or threats. This will be useful information when other public services are unavailable, and police and fire are overwhelmed.

The present invention provides the components and system for a self-assembling hardened network which will function without other infrastructure by creating a time-evolving map of the radiation dose and doserate. Other environmental sensors for additional purposes can be added to it. The network offers simple electronic applications able to be run on a hand held electronic device, with base station or booster elements and/or, the cell network in conjunction with a radiation detector to provide stay time and health hazard decision making support to individuals in unknown or varying radiation fields. This capability will survive prompt and fallout features of nuclear disasters, as well as other environmental issues or threats. This will be useful information when other public services are unavailable, and police and fire are overwhelmed.

A smart dosimeter coupled to a legal dosimeter and used as if they were incorporated into one structure. A sensor, provided in the smart dosimeter, detects a worker is wearing the legal dosimeter. An instantaneous exposed dose value can be checked, in real time, to assist a worker with performing an operation or task. A motion detection unit detects a motion; a legal dosimeter detection unit checks whether the legal dosimeter is coupled to the smart dosimeter; a wearing check unit checks whether the worker is wearing the legal dosimeter based upon motion information; a G-M detection unit detects a real-time exposed dose of the worker; and a data communication unit transmits the exposed dose, detected by the G-M detection unit, to a management server and receives warning situation information from the management server.

A smart dosimeter coupled to a legal dosimeter and used as if they were incorporated into one structure. A sensor, provided in the smart dosimeter, detects a worker is wearing the legal dosimeter. An instantaneous exposed dose value can be checked, in real time, to assist a worker with performing an operation or task. A motion detection unit detects a motion; a legal dosimeter detection unit checks whether the legal dosimeter is coupled to the smart dosimeter; a wearing check unit checks whether the worker is wearing the legal dosimeter based upon motion information; a G-M detection unit detects a real-time exposed dose of the worker; and a data communication unit transmits the exposed dose, detected by the G-M detection unit, to a management server and receives warning situation information from the management server.

According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, a detector, and processing circuitry. The X-ray tube emits X-rays. The detector detects X-rays that have been emitted from the X-ray tube and have passed through the subject. The processing circuitry sets an imaging condition. The processing circuitry evaluates the imaging condition based on information on a lower limit range of a count value of the detected X-rays that may cause image degradation.

A personal radiation and density meter system includes a housing, a radiation detection subsystem and a radiation emitting sub-system. The housing includes an interior portion configured as an interior space, and a slot. The radiation detection sub-system includes a personal radiation dosimeter positioned in the slot. The radiation emitting sub-system includes a shield assembly, a source, an actuator, a trigger, and an aperture.

A personal radiation and density meter system includes a housing, a radiation detection subsystem and a radiation emitting sub-system. The housing includes an interior portion configured as an interior space, and a slot. The radiation detection sub-system includes a personal radiation dosimeter positioned in the slot. The radiation emitting sub-system includes a shield assembly, a source, an actuator, a trigger, and an aperture.

A radiation imaging apparatus includes a radiation detection unit with a pixel array configured to generate a signal according to radiation and a notification unit configured to perform notification by sound production. The radiation imaging apparatus includes: a detection unit configured to detect a plurality of notification events occurring in accordance with a state of the radiation imaging apparatus; and a control unit configured to control the notification by the notification unit based on priority set for each of the plurality of notification events.