Fail-safe radiation concealment mechanisms for imaging capsules

An imaging capsule with a fail-safe radiation mechanism, comprising:

• a radiation source;
• a first rotatable disk with the radiation source mounted thereon, the first rotatable disk having a collimator structure allowing the emission of radiation from the radiation source from one or more locations on the circumference of the first disk;
• a second rotatable disk surrounding the circumference of the first rotatable disk and configured to rotate relative to the first rotatable disk, the second rotatable disk including areas that block radiation and areas that are transparent to the emission of radiation, wherein the areas that block radiation on the second rotatable disk are located so that there exists a rest position of the second rotatable disk relative to the first rotatable disk in which the areas that block radiation on the second rotatable disk coincide with the one or more locations on the circumference of the first rotatable disk that allow the emission of radiation, to block the emission of radiation;
• a connector assembly configured to couple the first rotatable disk to the second rotatable disk:
• and
• a motor for rotating one of the rotatable disks relative to the other of the rotatable disks,
• wherein the first rotatable disk and second rotatable disk are configured to be initially in the rest position blocking the emission of radiation until the motor is activated to rotate the one of the rotatable disks and allow die emission of radiation, and
• wherein the connector assembly is configured to automatically return the first rotatable disk and the second rotatable disk to the rest position when the motor is deactivated, thus providing a fail-safe radiation mechanism.