2007 Recommendations of the ICRP Change Basis for Estimation of the Effective Dose: What is the Impact on Radiation Dose Assessment of Patient and Personnel?

Boetticher, Heiner von; Lachmund, Jörn; Looe, Hui Khee; Hoffmann, Wolfgang; Poppe, Björn

doi:10.1055/s-2008-1027284

Cited by 20 publications

(16 citation statements)

References 3 publications

(5 reference statements)

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“…This supports the derivation of two separate double dosimetry formulas for use and non-use of thyroid protection, respectively. This is in line with previous research determining E for angiography providing evidence for a factor of 1.7-3.0 (ICRP 1991) and 1.5-1.9 (ICRP 2007) for use vs. non-use of thyroid protection and severe limitations of the routine algorithm based on H p,c,u (10) at only one position according to ICRP 60 in this situation (von Boetticher et al 2008).…”

Section: Discussionsupporting

confidence: 90%

Effective Dose Estimation in Diagnostic Radiology With Two Dosimeters: Impact of the 2007 Recommendations of the Icrp

Boetticher

Lachmund²,

Hoffmann³

2008

Health Physics

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In many standard situations in radiation protection the effective dose is underestimated if it is based on the depth personal dose equivalent Hp(10) measured with a single dosimeter in the anterior thoracic region (chest) underneath the protective apron (Hp,c,u). The estimate can be significantly improved by inclusion of a second dosimeter worn on the front area of the neck over of the protective garment (Hp,n,o) representing organs and areas that are usually not completely covered by the protective garment. The recent recommendations of the International Commission on Radiological Protection (ICRP) emphasize the contribution of the head and neck region to the effective dose. This accentuates the need for a valid representation of this body region in the effective dose algorithm. In this paper we derived coefficients for the two-dosimeter situation using phantom measurements for selected radiological procedures with different geometries between patient and investigator. According to ICRP 60, the algorithm with {without} thyroid protection is E = 0.64{0.64} Hp,c,u + 0.016{0.073} Hp,n,o. According to ICRP 103, the algorithm becomes E = 0.60{0.60} Hp,c,u + 0.047{0.094} Hp,n,o. The ICRP 103 model reveals that the underestimation of the effective dose based on Hp(10) using a single dosimeter worn under the protective garment is even higher than previously assumed based on ICRP 60. Future personal dosimetry should be qualified by a two-dosimeter concept. The head and neck region which is not covered by a conventional protective garment needs to be protected by mounted shielding or other constructive measures.

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Section: Discussionsupporting

confidence: 90%

Effective Dose Estimation in Diagnostic Radiology With Two Dosimeters: Impact of the 2007 Recommendations of the Icrp

Boetticher

Lachmund²,

Hoffmann³

2008

Health Physics

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“…In high-pitch CTCA, the femalespecific effective dose is higher compared to male effective dose measurements by an average of up to 8.6%. In conventional overlapping CTCA data acquisition, however, females received increased effective dose values of up to 70% [6,[12][13][14].…”

Section: Discussionmentioning

confidence: 99%

“…The breast phantom attachments could influence the calculation of the malespecific effective dose by increased soft tissue in the scan range. Nevertheless, evaluated values of effective dose using a hermaphrodite phantom are sufficiently precise for application in radiological radiation protection [5,6].…”

Section: Dosimetrymentioning

confidence: 99%

High-Pitch Computed Tomography Coronary Angiography – A New Dose Saving Algorithm: Estimation of Radiation Exposure

Ketelsen¹,

Buchgeister²,

Fenchel³

et al. 2012

Fortschr Röntgenstr

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properly cited.Purpose. To estimate effective dose and organ equivalent doses of prospective ECG-triggered high-pitch CTCA. Materials and Methods. For dose measurements, an Alderson-Rando phantom equipped with thermoluminescent dosimeters was used. The effective dose was calculated according to ICRP 103. Exposure was performed on a second-generation dual-source scanner (SOMATOM Definition Flash, Siemens Medical Solutions, Germany). The following scan parameters were used: 320 mAs per rotation, 100 and 120 kV, pitch 3.4 for prospectively ECG-triggered high-pitch CTCA, scan range of 13.5 cm, collimation 64 × 2 × 0.6 mm with z-flying focal spot, gantry rotation time 280 ms, and simulated heart rate of 60 beats per minute. Results. Depending on the applied tube potential, the effective whole-body dose of the cardiac scan ranged from 1.1 mSv to 1.6 mSv and from 1.2 to 1.8 mSv for males and females, respectively. The radiosensitive breast tissue in the range of the primary beam caused an increased female-specific effective dose of 8.6%±0.3% compared to males. Decreasing the tube potential, a significant reduction of the effective dose of 35.8% and 36.0% can be achieved for males and females, respectively (P < 0.001). Conclusion. The radiologist and the CT technician should be aware of this new dose-saving strategy to keep the radiation exposure as low as reasonablly achievable.

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“…Dabei [20]. 2007 wurden modifizierte Organwichtungsfaktoren eingeführt [21], wobei hier für die CTC -im Gegensatz zu bspw. der Herz-CTBildgebung -durch die Neuberechnung der Wichtungsfaktoren keine wesentlich höheren effektiven Dosen zu erwarten sind.…”

Section: Auswertung Der Datensätzeunclassified

CT-Kolografie: Vergleich zweier Visualisierungsalgorithmen an einem Screeningkollektiv

Juchems¹,

Ernst²,

Sheafor³

et al. 2009

Fortschr Röntgenstr

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2007 Recommendations of the ICRP Change Basis for Estimation of the Effective Dose: What is the Impact on Radiation Dose Assessment of Patient and Personnel?

Cited by 20 publications

References 3 publications

Effective Dose Estimation in Diagnostic Radiology With Two Dosimeters: Impact of the 2007 Recommendations of the Icrp

Effective Dose Estimation in Diagnostic Radiology With Two Dosimeters: Impact of the 2007 Recommendations of the Icrp

High-Pitch Computed Tomography Coronary Angiography – A New Dose Saving Algorithm: Estimation of Radiation Exposure

CT-Kolografie: Vergleich zweier Visualisierungsalgorithmen an einem Screeningkollektiv

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