Image filters improve image quality and lower patient radiation dose associated with CT scans

May 03, 2010

Adaptive image filters can lower the patient radiation associated with chest and abdominal computed tomography (CT) scans while significantly improving image quality, according to a study to be presented at the ARRS 2010 Annual Meeting in San Diego, CA.

Image filters are one of the tools used in to lower image "noise" in low CT. "As we lower the radiation dose, the CT images become "noisy" or speckled which makes it difficult to view the organs or the body structures in the image," said Sarabjeet Singh, MD, lead author of the study. "Image filters allow us to effectively lower the radiation dose without sacrificing the image clarity," said Singh.

The study, performed at Massachusetts General Hospital in Boston, MA, included 12 patients who received a at four different levels of radiation dose in the chest and abdomen. All low dose images were processed with adaptive filters, and "regardless of radiation dose, post processing with image filters improved subjective noise for both chest and abdominal CT and helped lower the CT radiation dose levels for chest by up to 40 mAs and for the abdominal CT by up to 100 mAs," said Singh.

"With the increasing use of CT, radiation dose concerns have been rising in the medical community, patients, as well as the media. Hence various efforts have been made to lower the radiation dose associated with CT scanning," he said.

"There are many ways to lower patient radiation dose associated with CT scans. However, the filters are one of the simpler ways of reducing radiation dose with CT. They only require a selection of preset settings that can be applied automatically to improve image quality and thus enable lowering of the radiation dose," said Singh.

Explore further: DNA blood test detects lung cancer mutations

Related Stories

Radiation dose drastically reduced during whole chest MDCT

Jun 24, 2009

Emergency physicians who evaluate patients with non-specific chest pain using whole chest multi-detector CT (MDCT) combined with retrospective electrocardiogram (ECG) gating can reduce the patient radiation dose by 71% using ...

Recommended for you

DNA blood test detects lung cancer mutations

19 hours ago

Cancer DNA circulating in the bloodstream of lung cancer patients can provide doctors with vital mutation information that can help optimise treatment when tumour tissue is not available, an international group of researchers ...

Tumors prefer the easy way out

21 hours ago

Tumor cells become lethal when they spread. Blocking this process can be a powerful way to stop cancer. Historically, scientists thought that tumor cells migrated by brute force, actively pushing through whatever ...

Brain tumors may be new targets of Ebola-like virus

21 hours ago

Brain tumors are notoriously difficult for most drugs to reach, but Yale researchers have found a promising but unlikely new ally against brain cancers—portions of a deadly virus similar to Ebola.

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.