A mobile inspection system comprising: an inspection module mounted on a chassis of the system and comprising an inspection radiation source and an inspection radiation detector, wherein the system is configured to operate at least in: a transport mode wherein the system is configured to transport the inspection module; and an inspection mode wherein the inspection module is configured to cause scan of an item, the inspection mode comprising a scan mode wherein the system is configured to move, with a scanning motion, with respect to the item to be scanned, characterized in that the mobile inspection system further comprises: a motion generation module comprising a transfer case adapted to be connected to an engine configured to cause motion of the system in the transport mode and in the scan mode, wherein the transfer case is configured to switch between a transport mode when the system is in the transport mode, and an inspection mode when the system is in the inspection mode; and a power conversion module configured to cause conversion of energy from the engine into electrical energy for at least the inspection module, in the inspection mode, wherein the transfer case of the motion generation module is further configured to cause the power conversion module to cause supply of energy at least to the inspection module, in the inspection mode. an inspection module mounted on a chassis of the system and comprising an inspection radiation source and an inspection radiation detector, wherein the system is configured to operate at least in: a transport mode wherein the system is configured to transport the inspection module; and an inspection mode wherein the inspection module is configured to cause scan of an item, the inspection mode comprising a scan mode wherein the system is configured to move, with a scanning motion, with respect to the item to be scanned, a transport mode wherein the system is configured to transport the inspection module; and an inspection mode wherein the inspection module is configured to cause scan of an item, the inspection mode comprising a scan mode wherein the system is configured to move, with a scanning motion, with respect to the item to be scanned, characterized in that the mobile inspection system further comprises: a motion generation module comprising a transfer case adapted to be connected to an engine configured to cause motion of the system in the transport mode and in the scan mode, wherein the transfer case is configured to switch between a transport mode when the system is in the transport mode, and an inspection mode when the system is in the inspection mode; and a power conversion module configured to cause conversion of energy from the engine into electrical energy for at least the inspection module, in the inspection mode, wherein the transfer case of the motion generation module is further configured to cause the power conversion module to cause supply of energy at least to the inspection module, in the inspection mode. a motion generation module comprising a transfer case adapted to be connected to an engine configured to cause motion of the system in the transport mode and in the scan mode, wherein the transfer case is configured to switch between a transport mode when the system is in the transport mode, and an inspection mode when the system is in the inspection mode; and a power conversion module configured to cause conversion of energy from the engine into electrical energy for at least the inspection module, in the inspection mode, wherein the transfer case of the motion generation module is further configured to cause the power conversion module to cause supply of energy at least to the inspection module, in the inspection mode.