Healthcare

The U.S. Food and Drug Administration (FDA) updated current guidelines of computed tomography (CT) brain perfusion scan in response to hundreds of patients who were accidentally exposed to excessive CT radiation, as well as an investigation of GE Healthcare and Toshiba American Medical Systems, the manufacturers of the scanners involved.

A hair loss or skin redness can occurs as resulting from excessive radiation of CT brain pefusions scans to diagnose and treat stroke, but also may not produce any obvious signs.
However, this scan may undergo excessive radiation exposure over the time when the patients problem is undetected. In this way, the risk of cancer may increased.

The current guidelines that updated by FDA in November 9, 2010, is recommend the imaging facilities and professionals can avoid radiation overdoses with CT brain perfusion scans stress the need for painstaking thoughtfulness. Also, CT operator should be trained on the specific scanner and imaging protocol they are using, with particular attention paid to dose saving features such as automatic exposure control.

According to agency, used improperly, automatic exposure control can lead to patients receiving too much radiation.

Although the FDA suggested ways for all manufacturers to make the technology more foolproof, the agency concludes that the radiation overdoses probably resulted from improper use of the scanners.

Therefore, current FDA announcement tries to avoid dampening faith in the procedure.
The FDA states, “A medically-needed CT scan that does not expose the patient to unnecessary radiation has benefits that far outweigh the radiation risks.”

An example explained by the agency, if more than 1 study is planned for a scanning session, imaging professionals should adjust the dose so that it is appropriate for each study (the opposite of a set-it-and-forget mindset). Likewise, they should check the display panel of the machine before performing each scan to ensure that the amount of radiation shown is the right one for the patient. After the session, they should assess whether the patient received too high a dose.

For the manufacturers, the FDA issued a letter that listing a number of steps could take to minimize user error to an association of radiological imaging-device manufacturer, Medical Imaging & Technology Alliance in November 8, 2010.

The agency give an example, any facility buying basic CT equipment should receive information and training on brain-perfusion protocols, regardless of whether they buy the software for such scans.
Another recommended safeguard is tweaking the software to warn equipment operators through a pop-up notification that the planned radiation dose could possibly harm the patient.