The present application discloses a method for detecting an abnormity in an optical path or measuring and adjusting of a dynamic balance of a gantry in a CT system, comprising performing, by a gantry controlled by a controller, a test scan along an optical path of the CT system, the optical path being a path along which rays pass from a ray source to a detector. The method further comprises obtaining, by a processor, data relating to the test scan, and based on the data relating to the test scan. The method further comprises determining, by the processor, a status characteristic index of the optical path or an amount of dynamic imbalance of the gantry. The method further comprises analyzing, by the processor, a result of the status characteristic index; determining, by the processor, whether the optical path is abnormal, or determining whether a dynamic balance of the gantry satisfies a requirement based on a result of the analysis of the amount of dynamic imbalance.

An x-ray source assembly is configured to move an x-ray source along an imaging trajectory while a counterweight is configured to move simultaneously with the x-ray source assembly to counterbalance the x-ray source assembly.

A portable radiation imaging apparatus improves visibility while moving by arranging the supporting column in the low-position. A base 46 is at a bottom end of a supporting column 41 and is fixed to turntable 78. A surface holding bearing 60 has an inner ring 61 and an outer ring 62 between the turntable 78 and a bottom plate 79. The inner ring 61 of the surface holding bearing 60 is fixed to the turntable 78 and the outer ring 62 is fixed to the bottom plate 79. The turntable 78 revolves with the supporting column 41 around the revolving center C, as the center, of the supporting column 41 and the turntable 78. An idler element 65 has a first circumference 63 and a second circumference 64 is installed to a circumference of the surface holding bearing 60. The revolving-side stopper 81 and the fixing-side stopper 82 regulate the idler element 65.

A source image distance (SID) adjustable X-ray imaging apparatus is provided. The X-ray imaging apparatus may include an arm including a first end and a second end, a first X-ray component arranged at the first end of the arm, and a second X-ray component arranged at the second end of the arm. The first X-ray component and the second X-ray component may be opposite to each other. The first X-ray component may be configured to generate X-rays or receive X-rays. The first end may include a first weight balancing mechanism. When the first X-ray component moves with respect to the first weight balancing mechanism, the SID of the X-ray imaging apparatus may change but the first weight balancing mechanism may maintain a center of gravity of the first end unchanged.

The axial direction B of the spindle 64 for supporting the movable pulleys 58 and 59 is arranged at a position rotated about the axis of the shaft relative to the axial direction of the spindle 56. The axial direction B of the spindle 64 is arranged in a state of being inclined by a predetermined angle with respect to the axial direction A when the movable pulleys 58 and 59 are in the lifted position. This allows the movable pulleys 58 and 59 to be automatically moved to a position at which no stress is applied to the first wire rope 54.

A balance mechanism comprises a working device, a connecting arm assembly having a variable length, a torque-balancing assembly, a weighting member, and a connecting member. The connecting arm assembly couples to the working device. The connecting arm assembly is pivoted to the torque-balancing assembly by a pivot. The weighting member couples to the torque-balancing assembly. The connecting member connects the connecting arm assembly and the torque-balancing assembly. As the distance between the working device and the pivot changes, the distance between the weighting member and the pivot changes accordingly, so that a dynamic balance can be achieved.

In this diagnostic X-ray apparatus (1), a radius of a spiral pulley (63) is set to a radius that differs from a radius of an Archimedes' spiral so that a tensile force of the spring member (61) applied to a second wire rope (67b) and a weight on an X-ray generation unit (50) side applied to a first wire rope (67a) are balanced.

The present application discloses a method for detecting an abnormity in an optical path or measuring and adjusting of a dynamic balance of a gantry in a CT system, comprising performing, by a gantry controlled by a controller, a test scan along an optical path of the CT system, the optical path being a path along which rays pass from a ray source to a detector. The method further comprises obtaining, by a processor, data relating to the test scan, and based on the data relating to the test scan. The method further comprises determining, by the processor, a status characteristic index of the optical path or an amount of dynamic imbalance of the gantry. The method further comprises analyzing, by the processor, a result of the status characteristic index; determining, by the processor, whether the optical path is abnormal, or determining whether a dynamic balance of the gantry satisfies a requirement based on a result of the analysis of the amount of dynamic imbalance.

The present disclosure relates to a lifting apparatus. The lifting apparatus may include a base column, a mobile column, a sliding component, a supporting arm, a lifting system, and a move-coordination system. The mobile column connected to the base column may be vertically movable relative to the base column. The lifting system may be configured to cause the movement of the mobile column. The sliding component connected to the mobile column may be vertically movable relative to the mobile column. The mobile column and the sliding component may be connected via the move-coordination system, which enables the sliding component and the mobile column to move simultaneously according to a predetermined relative motion relationship. The supporting arm may be connected to the sliding component.

According to the present invention, a highly safe moving-type radiation device can be provided. In the case of a conventional configuration using tension springs, if a spring is severed, the fragments will separate from each other permanently. Therefore, the present invention uses compression spring 8a and 8b instead. According to the spring mechanism of the present invention, even if a shaft is about to move largely in accordance with the severing of a spring, fragments of the spring, which has become stuck each other and immovable, interfere and prevent the movement of the shaft. What has been devised in the present invention is a junction spring seat that links a plurality of compression springs 8a and 8b. With this, even in cases where the compression springs 8a and 8b are linked in series, the compression springs 8a and 8b will not be buckled.