Effective dose estimation for pediatric voiding cystourethrography using an anthropomorphic phantom set and metal oxide semiconductor field-effect transistor (MOSFET) technology

Lee, Ryan; Thomas, Karen E.; Connolly, Bairbre; Falkiner, Michelle; Gordon, Christopher L.

doi:10.1007/s00247-009-1161-5

Cited by 33 publications

(12 citation statements)

References 22 publications

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“…For conventional X-rays and voiding cystourethrograms (VCUGs), doses corresponding to our current departmental parameters, which are compatible with the literature (13,14), were accepted as the reference values for calculating the relative chest X-ray equivalent units (Table 2). In general, the parameters used for conventional pediatric A multiple-choice format was used in this survey to enable faster completion and to facilitate the evaluation of the answers.…”

Section: Resultsmentioning

confidence: 99%

Pediatricians’ awareness of diagnostic medical radiation effects and doses; are the latest efforts paying off?

Ekşioğlu¹,

Üner²

2011

Diagn Interv Radiol

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Section: Resultsmentioning

confidence: 99%

Pediatricians’ awareness of diagnostic medical radiation effects and doses; are the latest efforts paying off?

Ekşioğlu¹,

Üner²

2011

Diagn Interv Radiol

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“…the introduction of pulsed fluoroscopy capability). For the majority of studies and procedures, dose assignment was based on institutional data applicable to the time period of our study [6][7][8][9][10]. Published values from the pediatric radiology literature [11][12][13][14][15][16][17][18][19] were used for the small number of examinations for which institutional data were not available.…”

Section: Methodsmentioning

confidence: 99%

Long-term burden of care and radiation exposure in survivors of esophageal atresia

Zamiara

Thomas

Connolly

et al. 2015

Journal of Pediatric Surgery

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“…Until recently, MOSFETs were mainly used in radiotherapy, 10 , 11 , 12 , 13 but are now being more commonly used in different fields of diagnostic radiology 14 , 15 , 16 , 17 , 18 . A drawback with MOSFET dosimeters is that they have limited sensitivity when compared with TLD dosimeters.…”

Section: Introductionmentioning

confidence: 99%

Characterization of MOSFET dosimeters for low‐dose measurements in maxillofacial anthropomorphic phantoms

Koivisto

Wolff

Kiljunen

et al. 2015

J Applied Clin Med Phys

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The aims of this study were to characterize reinforced metal‐oxide‐semiconductor field‐effect transistor (MOSFET) dosimeters to assess the measurement uncertainty, single exposure low‐dose limit with acceptable accuracy, and the number of exposures required to attain the corresponding limit of the thermoluminescent dosimeters (TLD). The second aim was to characterize MOSFET dosimeter sensitivities for two dental photon energy ranges, dose dependency, dose rate dependency, and accumulated dose dependency. A further aim was to compare the performance of MOSFETs with those of TLDs in an anthropomorphic phantom head using a dentomaxillofacial CBCT device. The uncertainty was assessed by exposing 20 MOSFETs and a Barracuda MPD reference dosimeter. The MOSFET dosimeter sensitivities were evaluated for two photon energy ranges (50–90 kVp) using a constant dose and polymethylmethacrylate backscatter material. MOSFET and TLD comparative point‐dose measurements were performed on an anthropomorphic phantom that was exposed with a clinical CBCT protocol. The MOSFET single exposure low dose limit (25% uncertainty, normalk=2) was 1.69 mGy. An averaging of eight MOSFET exposures was required to attain the corresponding TLD (0.3 mGy) low‐dose limit. The sensitivity was 3.09±0.13 mV/mGy independently of the photon energy used. The MOSFET dosimeters did not present dose or dose rate sensitivity but, however, presented a 1% decrease of sensitivity per 1000 mV for accumulated threshold voltages between 8300 mV and 17500 mV. The point doses in an anthropomorphic phantom ranged for MOSFETs between 0.24 mGy and 2.29 mGy and for TLDs between 0.25 and 2.09 mGy, respectively. The mean difference was −8%. The MOSFET dosimeters presented statistically insignificant energy dependency. By averaging multiple exposures, the MOSFET dosimeters can achieve a TLD‐comparable low‐dose limit and constitute a feasible method for diagnostic dosimetry using anthropomorphic phantoms. However, for single in vivo measurements (<1.7 mGy) the sensitivity is too low.PACS number: 87.50.wj

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Effective dose estimation for pediatric voiding cystourethrography using an anthropomorphic phantom set and metal oxide semiconductor field-effect transistor (MOSFET) technology

Abstract: Effective doses for VCUG examinations performed in children

Cited by 33 publications

References 22 publications

Pediatricians’ awareness of diagnostic medical radiation effects and doses; are the latest efforts paying off?

Pediatricians’ awareness of diagnostic medical radiation effects and doses; are the latest efforts paying off?

Long-term burden of care and radiation exposure in survivors of esophageal atresia

Characterization of MOSFET dosimeters for low‐dose measurements in maxillofacial anthropomorphic phantoms

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