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A national survey on radiation dose in CT in The Netherlands.

van der Molen AJ, Schilham A, Stoop P, Prokop M, Geleijns J - Insights Imaging (2013)

Bottom Line: Dose levels were compared to surveys from other countries and to diagnostic reference levels.These results are lower than in Germany and comparable to those in the UK, and are within reference levels.Important differences remain between hospitals. • A national dose survey providing updated, detailed data for patient dose in the most frequently used CT protocols. • CT in the Netherlands is associated with relatively low individual radiation doses in standard patients compared to surrounding European countries. • Considerable differences remain between hospitals for the most frequently used CT protocols, indicating the need for further optimisation.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology C-2S, Leiden University Medical Center, Albinusdreef 2, NL-2333 ZA, Leiden, The Netherlands, molen@lumc.nl.

ABSTRACT

Objectives: To assess radiation exposure due to CT in the Netherlands.

Methods: Twenty-one hospitals participated in a dose survey for the 21 most frequently used CT protocols. Hospitals completed a Web survey with detailed parameters for one patient per protocol, including the dose length product (DLP) from the scanner dose report. Only standard-sized patients (1.74 m and 77 kg and BMI 25.4 kg/m(2) ± 15 %) for each protocol and available scanner were considered. Effective dose (E) per protocol was estimated using ICRP-103-based E/DLP coefficients. Dose levels were compared to surveys from other countries and to diagnostic reference levels.

Results: Data of 186 patients (247 scan phases) from 14 hospitals and 19 scanners were used for final analysis of DLP and E. Effective doses varied from 0.2 mSv in sinus CT to 19.4 mSv for multiphase liver. The most frequent exams were brain (1.5 mSv), abdomen (8.0 mSv), and thorax-abdomen (11.5 mSv). These results are lower than in Germany and comparable to those in the UK, and are within reference levels. Results between hospitals varied, with per protocol minimum/maximum E ratios ranging from 1.1-5.4.

Conclusions: Compared to surrounding countries, CT in the Netherlands is associated with relatively low radiation doses in standard patients. Important differences remain between hospitals.

Main messages: • A national dose survey providing updated, detailed data for patient dose in the most frequently used CT protocols. • CT in the Netherlands is associated with relatively low individual radiation doses in standard patients compared to surrounding European countries. • Considerable differences remain between hospitals for the most frequently used CT protocols, indicating the need for further optimisation.

No MeSH data available.


Related in: MedlinePlus

Trends in the number of CT examinations 1991–2010
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Related In: Results  -  Collection


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Fig1: Trends in the number of CT examinations 1991–2010

Mentions: In the Netherlands in 2010, about 9.8 million diagnostic imaging studies were performed using ionising radiation. Of these, 1.16 million were CT studies, doubling the number compared to 2002 (Figure 1). The average dose to the Dutch population associated with medical imaging was estimated to be 0.89 milliSievert (mSv). CT's contribution to this dose was 0.42 mSv (47.5 %), while other big contributors were angiography and interventions (22.3 %), conventional radiography and mammography (17.6 %), and nuclear medicine (11.0 %) [4]. Thus, while the above estimations were based on the actual number of diagnostic studies in 2010, the effective doses used for the estimations were taken from the DP study [5].Fig. 1


A national survey on radiation dose in CT in The Netherlands.

van der Molen AJ, Schilham A, Stoop P, Prokop M, Geleijns J - Insights Imaging (2013)

Trends in the number of CT examinations 1991–2010
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3675255&req=5

Fig1: Trends in the number of CT examinations 1991–2010
Mentions: In the Netherlands in 2010, about 9.8 million diagnostic imaging studies were performed using ionising radiation. Of these, 1.16 million were CT studies, doubling the number compared to 2002 (Figure 1). The average dose to the Dutch population associated with medical imaging was estimated to be 0.89 milliSievert (mSv). CT's contribution to this dose was 0.42 mSv (47.5 %), while other big contributors were angiography and interventions (22.3 %), conventional radiography and mammography (17.6 %), and nuclear medicine (11.0 %) [4]. Thus, while the above estimations were based on the actual number of diagnostic studies in 2010, the effective doses used for the estimations were taken from the DP study [5].Fig. 1

Bottom Line: Dose levels were compared to surveys from other countries and to diagnostic reference levels.These results are lower than in Germany and comparable to those in the UK, and are within reference levels.Important differences remain between hospitals. • A national dose survey providing updated, detailed data for patient dose in the most frequently used CT protocols. • CT in the Netherlands is associated with relatively low individual radiation doses in standard patients compared to surrounding European countries. • Considerable differences remain between hospitals for the most frequently used CT protocols, indicating the need for further optimisation.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology C-2S, Leiden University Medical Center, Albinusdreef 2, NL-2333 ZA, Leiden, The Netherlands, molen@lumc.nl.

ABSTRACT

Objectives: To assess radiation exposure due to CT in the Netherlands.

Methods: Twenty-one hospitals participated in a dose survey for the 21 most frequently used CT protocols. Hospitals completed a Web survey with detailed parameters for one patient per protocol, including the dose length product (DLP) from the scanner dose report. Only standard-sized patients (1.74 m and 77 kg and BMI 25.4 kg/m(2) ± 15 %) for each protocol and available scanner were considered. Effective dose (E) per protocol was estimated using ICRP-103-based E/DLP coefficients. Dose levels were compared to surveys from other countries and to diagnostic reference levels.

Results: Data of 186 patients (247 scan phases) from 14 hospitals and 19 scanners were used for final analysis of DLP and E. Effective doses varied from 0.2 mSv in sinus CT to 19.4 mSv for multiphase liver. The most frequent exams were brain (1.5 mSv), abdomen (8.0 mSv), and thorax-abdomen (11.5 mSv). These results are lower than in Germany and comparable to those in the UK, and are within reference levels. Results between hospitals varied, with per protocol minimum/maximum E ratios ranging from 1.1-5.4.

Conclusions: Compared to surrounding countries, CT in the Netherlands is associated with relatively low radiation doses in standard patients. Important differences remain between hospitals.

Main messages: • A national dose survey providing updated, detailed data for patient dose in the most frequently used CT protocols. • CT in the Netherlands is associated with relatively low individual radiation doses in standard patients compared to surrounding European countries. • Considerable differences remain between hospitals for the most frequently used CT protocols, indicating the need for further optimisation.

No MeSH data available.


Related in: MedlinePlus