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Radiation exposure from chest CT: issues and strategies.

Kalra MK, Maher MM, Rizzo S, Kanarek D, Shepard JA, Shephard JA - J. Korean Med. Sci. (2004)

Bottom Line: Concerns have been raised over alleged overuse of CT scanning and inappropriate selection of scanning methods, all of which expose patients to unnecessary radiation.Thus, it is important to identify clinical situations in which techniques with lower radiation dose such as plain radiography or no radiation such as MRI and occasionally ultrasonography can be chosen over CT scanning.This article proposes the arguments for radiation dose reduction in CT scanning of the chest and discusses recommended practices and studies that address means of reducing radiation exposure associated with CT scanning of the chest.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA. mkalra@partners.org

ABSTRACT
Concerns have been raised over alleged overuse of CT scanning and inappropriate selection of scanning methods, all of which expose patients to unnecessary radiation. Thus, it is important to identify clinical situations in which techniques with lower radiation dose such as plain radiography or no radiation such as MRI and occasionally ultrasonography can be chosen over CT scanning. This article proposes the arguments for radiation dose reduction in CT scanning of the chest and discusses recommended practices and studies that address means of reducing radiation exposure associated with CT scanning of the chest.

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Related in: MedlinePlus

Technology can aid in radiation dose reduction. Transverse CT image (224 mAs) (A) of a 44-yr-old man with chronic cough acquired with conventional scanning technique is similar to CT image (112 mAs) (B) acquired with automatic tube current modulation technique (at 50% reduction in radiation dose) in terms of diagnostic quality.
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Figure 2: Technology can aid in radiation dose reduction. Transverse CT image (224 mAs) (A) of a 44-yr-old man with chronic cough acquired with conventional scanning technique is similar to CT image (112 mAs) (B) acquired with automatic tube current modulation technique (at 50% reduction in radiation dose) in terms of diagnostic quality.

Mentions: Many recent advances in CT technologies, which address the issue of radiation optimization while maintaining image quality, are also facilitating acquisition of satisfactory images with reduced radiation exposure to patients (46-55). These include pre-patient collimation of X-ray beam, efficient X-ray filters, improved detector geometry, automatic tube current modulation (Fig. 2) and noise reduction filters. However, alternative cross-sectional imaging studies such as ultrasound and MRI should be used when they have equal diagnostic capability as an optimally performed CT examination.


Radiation exposure from chest CT: issues and strategies.

Kalra MK, Maher MM, Rizzo S, Kanarek D, Shepard JA, Shephard JA - J. Korean Med. Sci. (2004)

Technology can aid in radiation dose reduction. Transverse CT image (224 mAs) (A) of a 44-yr-old man with chronic cough acquired with conventional scanning technique is similar to CT image (112 mAs) (B) acquired with automatic tube current modulation technique (at 50% reduction in radiation dose) in terms of diagnostic quality.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2822293&req=5

Figure 2: Technology can aid in radiation dose reduction. Transverse CT image (224 mAs) (A) of a 44-yr-old man with chronic cough acquired with conventional scanning technique is similar to CT image (112 mAs) (B) acquired with automatic tube current modulation technique (at 50% reduction in radiation dose) in terms of diagnostic quality.
Mentions: Many recent advances in CT technologies, which address the issue of radiation optimization while maintaining image quality, are also facilitating acquisition of satisfactory images with reduced radiation exposure to patients (46-55). These include pre-patient collimation of X-ray beam, efficient X-ray filters, improved detector geometry, automatic tube current modulation (Fig. 2) and noise reduction filters. However, alternative cross-sectional imaging studies such as ultrasound and MRI should be used when they have equal diagnostic capability as an optimally performed CT examination.

Bottom Line: Concerns have been raised over alleged overuse of CT scanning and inappropriate selection of scanning methods, all of which expose patients to unnecessary radiation.Thus, it is important to identify clinical situations in which techniques with lower radiation dose such as plain radiography or no radiation such as MRI and occasionally ultrasonography can be chosen over CT scanning.This article proposes the arguments for radiation dose reduction in CT scanning of the chest and discusses recommended practices and studies that address means of reducing radiation exposure associated with CT scanning of the chest.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA. mkalra@partners.org

ABSTRACT
Concerns have been raised over alleged overuse of CT scanning and inappropriate selection of scanning methods, all of which expose patients to unnecessary radiation. Thus, it is important to identify clinical situations in which techniques with lower radiation dose such as plain radiography or no radiation such as MRI and occasionally ultrasonography can be chosen over CT scanning. This article proposes the arguments for radiation dose reduction in CT scanning of the chest and discusses recommended practices and studies that address means of reducing radiation exposure associated with CT scanning of the chest.

Show MeSH
Related in: MedlinePlus