Effective dose ? how effective for patients?

Drexler, G.; Panzer, W.; Petoussi, N.; Zankl, M.

doi:10.1007/bf01209771

Cited by 29 publications

(20 citation statements)

References 10 publications

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“…The PCXMC results of the present study for different radiation qualities were in a good agreement with published or calculated lung and breast dose conversion factors from the air kerma-area product to organ doses [7,9,36,37]. In thorax PA examination, the organ dose in relation to incident air kerma values increased as a function of increasing tube voltage, HVL and total filtration.…”

Section: Discussionsupporting

confidence: 76%

Incident air kerma to absorbed organ dose conversion factors for breast and lung in PA thorax radiography: The effect of patient thickness and radiation quality

2016

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Purpose: Converting the measurable quantities to patient organ doses in projection radiography is usually based on a standard-sized patient model and a specific radiation quality, which are likely to differ from the real situation. Large inaccuracies can therefore be obtained in organ doses, because organ doses are dependent on the exposure parameters, exposure geometry and patient anatomy. In this study, the effect of radiation quality and patient thickness on the organ dose conversion factors were determined. Methods: In this study, the posterior-anterior projection radiograph of the thorax was selected in order to determine the effect of radiation quality (tube voltages of 70 kV to 130 kV and total filtrations of 3 mmAl to 4 mmAl + 0.2 mmCu) and patient thickness (anterior-posterior thicknesses of 19.4 to 30.8 cm) on the breast and lung dose conversion factors. For this purpose, Monte Carlo simulation programs ImpactMC and PCXMC were used with computed tomography examination data of adult male and female patients and mathematical hermaphrodite phantoms, respectively. Results: Compared to the reference beam quality and patient thickness, the relative variation range in organ dose conversion factors was up to 74% for different radiation qualities and 122% for different patient thicknesses. Conclusions: Conversion factors should only be used with comprehensive understanding of the exposure conditions, considering the exposure parameters, exposure geometry and patient anatomy they are valid for. This study demonstrates that patient thickness-specific and radiation quality-specific conversion factors are needed in projection radiography.

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Section: Discussionsupporting

confidence: 76%

Incident air kerma to absorbed organ dose conversion factors for breast and lung in PA thorax radiography: The effect of patient thickness and radiation quality

2016

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“…Effective doses were calculated for both genders separately using the ICRP 103 tissueweighting factors [16]. However, the use of effective dose has been questioned, especially in children [17]. We determined the achievable dose savings of the low-dose CT protocols compared to standard CT protocols used in clinical practice (100 kVp with a noise index of 35 for newborns and 120 kVp with a noise index of 35 for 5-to 10-year-olds).…”

Section: Dose Simulationsmentioning

confidence: 99%

Limiting CT radiation dose in children with craniosynostosis: phantom study using model-based iterative reconstruction

et al. 2015

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“…The dose per lengthened centimeter and the dose per month while wearing the fixator also were calculated. The chosen unit is millisievert (mSv) to point out that it is for the equivalent dose and not for the absorbed energy dose (which commonly is denoted in Gray [Gy]) [2,14]. Both units are related to 1 J/kg.…”

Section: Methodsmentioning

confidence: 99%

“…fat, radiographic image format, film focus distance, tube voltage, and duration of intraoperative fluoroscopic examinations [2,15].…”

Section: Introductionmentioning

confidence: 99%

Estimation of Patient Dose and Associated Radiogenic Risks from Limb Lengthening

Schiedel

Buller

Rödl

2008

Clin Orthop Relat Res

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Limb-lengthening procedures include a series of radiographic examinations to follow the lengthening process and callus formation. We quantified ionizing radiation exposure during lengthening treatment and estimated the risks associated with this exposure in 53 patients undergoing lengthening procedures. Field size and tube voltage of all radiographs and fluoroscopy time during surgery were recorded. According to conversion factor tables of organ doses, the cumulative organ dose was estimated. Location of lengthening, age, complications during lengthening procedure, range of lengthening, healing index, and other factors affecting the duration of the lengthening procedures were analyzed. Average lengthening was 4.8 cm (range, 3.0-12.5 cm). The average cumulative organ dose for a straight lengthening procedure was 3.1 mSv (range, 0.2-12.5 mSv). The average organ dose per centimeter of lengthening was 0.7 mSv/cm (range, 0.03-5.9 mSv/cm). Doses for patients with tibial lengthening (0.3 mSv/cm) were less than doses for patients with femoral lengthening (1

show abstract

Effective dose ? how effective for patients?

Cited by 29 publications

References 10 publications

Incident air kerma to absorbed organ dose conversion factors for breast and lung in PA thorax radiography: The effect of patient thickness and radiation quality

Incident air kerma to absorbed organ dose conversion factors for breast and lung in PA thorax radiography: The effect of patient thickness and radiation quality

Limiting CT radiation dose in children with craniosynostosis: phantom study using model-based iterative reconstruction

Estimation of Patient Dose and Associated Radiogenic Risks from Limb Lengthening

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