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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

Box plots of the effective dose (mSv) of the three most frequently used CT protocols
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Related In: Results  -  Collection


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Fig2: Box plots of the effective dose (mSv) of the three most frequently used CT protocols

Mentions: For the standard-sized patients, the established median DLP and E doses ranged from a low of 105 mGy cm and 0.2 mSv for sinus CT to a high of 1322 mGy cm and 19.4 mSv for multiphasic liver CT (Table 1 and 2). The most frequent examinations were brain, abdomen, and thorax-abdomen CT, which showed a modest median DLP of 814 mGy cm, 567 mGy cm, and 814 mGy cm, and median effective doses of 1.5 mSv, 8.0 mSv, and 11.6 mSv, respectively (Figure 2).


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)

Box plots of the effective dose (mSv) of the three most frequently used CT protocols
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig2: Box plots of the effective dose (mSv) of the three most frequently used CT protocols
Mentions: For the standard-sized patients, the established median DLP and E doses ranged from a low of 105 mGy cm and 0.2 mSv for sinus CT to a high of 1322 mGy cm and 19.4 mSv for multiphasic liver CT (Table 1 and 2). The most frequent examinations were brain, abdomen, and thorax-abdomen CT, which showed a modest median DLP of 814 mGy cm, 567 mGy cm, and 814 mGy cm, and median effective doses of 1.5 mSv, 8.0 mSv, and 11.6 mSv, respectively (Figure 2).

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