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Experts offer pointers for optimizing radiation dose in head CT

Date:
August 1, 2011
Source:
American College of Radiology
Summary:
A new article summarizes methods for radiation dose optimization in head computed tomography (CT) scans. Head CT is the second most commonly performed CT examination, with 28 percent of the total number of CT examinations.

An article in the August issue of the Journal of the American College of Radiology summarizes methods for radiation dose optimization in head computed tomography (CT) scans. Head CT is the second most commonly performed CT examination, with 28 percent of the total number of CT examinations.

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Magnetic resonance imaging (MRI) has emerged as the imaging modality of choice for a vast majority of brain and spinal indications. However, CT remains an integral part of modern neuroradiologic practice that can provide lifesaving information about patient management, specifically in patients with cerebrovascular diseases and head trauma.

Investigators from Massachusetts General Hospital, Harvard Medical School, in Boston, MA, and Johns Hopkins University in Baltimore, MD, looked at various head CT examinations and outlined strategies for radiation dose reduction for the application of CT in the head, paranasal sinuses and spine.

"In the head, specific scanning protocols must be assigned depending on the examination type or clinical indication, such as routine head CT, CT angiography, CT perfusion and paranasal or facial CT. In addition, users must ensure that CT is being performed for a valid clinical indication, whereby CT is expected to add information that will affect patient management," said Mahadevappa Mahesh, MS, PhD author of the article.

Investigators emphasize the use of certain techniques such as lower tube current, automatic exposure control and scanning at a lower tube voltage (especially for perfusion CT scans) are key for allowing substantial dose reduction for head CT examinations in both children and adults.


Story Source:

The above story is based on materials provided by American College of Radiology. Note: Materials may be edited for content and length.


Journal Reference:

  1. Sarabjeet Singh, Mannudeep K. Kalra, James H. Thrall and Mahadevappa Mahesh. Pointers for Optimizing Radiation Dose in Head CT Protocols. Journal of the American College of Radiology, Volume 8, Issue 8, August 2011, Pages 591-593 DOI: 10.1016/j.jacr.2011.05.001

Cite This Page:

American College of Radiology. "Experts offer pointers for optimizing radiation dose in head CT." ScienceDaily. ScienceDaily, 1 August 2011. <www.sciencedaily.com/releases/2011/08/110801094709.htm>.
American College of Radiology. (2011, August 1). Experts offer pointers for optimizing radiation dose in head CT. ScienceDaily. Retrieved January 25, 2015 from www.sciencedaily.com/releases/2011/08/110801094709.htm
American College of Radiology. "Experts offer pointers for optimizing radiation dose in head CT." ScienceDaily. www.sciencedaily.com/releases/2011/08/110801094709.htm (accessed January 25, 2015).

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