Arietta 850 software version 4.0.0., 4.0.1, and 4.0.2 has an error in the focus point and transducer aperture settings in the SWE function. When the affected software with SWE function is used in conjunction with the C252 probe, this error can result in out of specification MI/TI acoustic output. The MI/TI acoustic output is higher than regulatory limits.
Hitachi Medical Systems America
These 18 probes may have mis-wiring in the inner cables, causing decreased sensitivity and thus resulting in lower peak velocity readings.
Class I - Dangerous
There is a possibility that the cables to the controller unit may not be affixed properly, creating the potential for a cable to detach during scanning and eject from the system.
The firm received a complaint where, during patient positioning, the technologist was adjusting the patient table height and the table failed to stop when the control was released and contacted the CT gantry. The problem could not be duplicated at the site, so to avoid further issues while a root cause investigation was pursued, Hitachi choose to add an optional touch sensor to the gantry to add a redundant level of protection. It is conceivable that a patient s extremity may be caught between the tabletop and the gantry surface during uncontrolled motion or that the table contact of the gantry might cause internal damage to the unit.
The stainless steel belt which runs the length of the table underneath the tabletop is exposed when the tabletop is extended into the magnet for scanning. The firm has received two complaints where technologists have cut their fingers on this belt.
The ultrasound probe may not have adequate protection against electrical shock hazards.
Class I - Dangerous
The strength of the arm mounting mechanism was insufficient and had to be redesigned.
Class I - Dangerous
Image data transferred from the MRI system to a workstation showed errors on the slice position reference image.
Class I - Dangerous
Image data transferred from the MRI system to a workstation showed errors on the slice position reference image.
Class I - Dangerous
Image data transferred from the MRI system to a workstation showed errors on the slice position reference image.
Class I - Dangerous
The customer indicated that the coil balun was hot to the touch when removing the coil from the patient table after an exam.
Class I - Dangerous
The firm discovered that the centrifugal force applied to the power supply may cause it to fail over time. The exam performed at the time of the failure will likely be lost, resulting in the need to rescan the patient.
The firm received a complaint stating the Coil Extension Cable accessory would overheat and be a burn hazard if touched.
The Gradient Coil was found to have a failure mode that allowed it to overheat and become a burn hazard.
Hitachi discovered a software error that can occur when simultaneously scanning a patient while processing images previously acquired from a different patient. The software error can occur randomly. The error causes an image in the processed dataset to have the same unique identifier (UID) as in the scanning dataset. The processed image is stored in the place of the original image, which is lost.
Hitachi discovered a software error with a feature called Multi-Planar Reconstruction (MPR). MPR takes an original volume dataset reconstructed in any plane view and creates a new image set from another view (i.e. axial to coronal, coronal to sagittal, etc.). The error causes the first image in the dataset to have a right/left reversed orientation. The software error can occur randomly when execu
Hitachi discovered a software error in the Reconstruction Status function that creates a potential risk that a patient study will not be fully reconstructed. When multiple reconstructions are queued for processing, if a queue is suspended and the task order changed, the second queue may not reconstruct the full range of slices. This may result in missing diagnostic data.