Diagnostic reference levels and patient doses in computed tomography examinations in Greece

Simantirakis, G.; Hourdakis, C. J.; Economides, S.; Kaisas, I.; Kalathaki, M.; Koukorava, C.; Manousaridis, G.; Pafilis, C.; Tritakis, P.; Vogiatzi, S.; Kamenopoulou, V.; Dimitriou, P.

doi:10.1093/rpd/ncu182

Cited by 29 publications

(14 citation statements)

References 3 publications

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“…For an axial scan with pitch of 1 and scan length of 22 cm, the DLP values for three different scan setting of Table were 163.68, 306.24, and 534.6, at tube voltages of 80, 100, and 120 kVp, respectively. The amount of DLP values of this study are within the range reported by other authors …”

Section: Methodssupporting

confidence: 91%

Pulmonary embolism in pregnant patients: Assessing organ dose to pregnant phantom and its fetus during lung imaging

et al. 2017

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Section: Methodssupporting

confidence: 91%

Pulmonary embolism in pregnant patients: Assessing organ dose to pregnant phantom and its fetus during lung imaging

et al. 2017

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“…Table 8 and Figure 5 summarize the results for the trunk (chest; abdomen and pelvis; chest, abdomen, and pelvis) examinations for median-size patients. Table 9 shows that the U.S. DRLs are not markedly different from those in other countries (11)(12)(13)(19)(20)(21)(22)(23)(24)(25).…”

Section: Resultsmentioning

confidence: 95%

U.S. Diagnostic Reference Levels and Achievable Doses for 10 Adult CT Examinations

et al. 2017

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Purpose To develop diagnostic reference levels (DRLs) and achievable doses (ADs) for the 10 most common adult computed tomographic (CT) examinations in the United States as a function of patient size by using the CT Dose Index Registry. Materials and Methods Data from the 10 most commonly performed adult CT head, neck, and body examinations from 583 facilities were analyzed. For head examinations, the lateral thickness was used as an indicator of patient size; for neck and body examinations, water-equivalent diameter was used. Data from 1 310 727 examinations (analyzed by using SAS 9.3) provided median values, as well as means and 25th and 75th (DRL) percentiles for volume CT dose index (CTDI), dose-length product (DLP), and size-specific dose estimate (SSDE). Applicable results were compared with DRLs from eight countries. Results More than 46% of the facilities were community hospitals; 13% were academic facilities. More than 48% were in metropolitan areas, 39% were suburban, and 13% were rural. More than 50% of the facilities performed fewer than 500 examinations per month. The abdomen and pelvis was the most frequently performed examination in the study (45%). For body examinations, DRLs (75th percentile) and ADs (median) for CTDI, SSDE, and DLP increased consistently with the patient's size (water-equivalent diameter). The relationships between patient size and DRLs and ADs were not as strong for head and neck examinations. These results agree well with the data from other countries. Conclusion DRLs and ADs as a function of patient size were developed for the 10 most common adult CT examinations performed in the United States. RSNA, 2017.

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“…There are considerable DRLs and benchmarks available internationally for our comparison. (Table 2) [8,9,12,20,[22][23][24][25][26][27][28][29][30]. Our institutional median values, also known as, our FRL are considerably lower than all other countries and well below our NDRL.…”

Section: Discussionmentioning

confidence: 86%

Establishment of facility reference level in computed tomography in selective examinations in a single institution in South Australia: A preliminary study

Chau¹

2019

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to 26 June 2017. Examinations were separated as contrast and non-contrast studies, and single phasic for single acquisition or multiphasic for more than one acquisition. The common CT examinations, including chest, chest abdomen/pelvis, and abdomen/pelvis were reported. Examinations such as CT colonoscopy, CT pulmonary angiogram, CT gating angiography, CT chest and abdomen/pelvis non-contrast, CT high resolution lung and CT renal colic were excluded from the study. This is mostly due to a low number of examinations and the use of different exposure factors and/or techniques. The median mean (50 th percentile), and 75 th percentile for the dose spread were calculated according to the examination. Results: There was a total of 1571 CT examinations performed between 26 December 2016 and 26 June 2017 using the Toshiba scanner in our institution. 262 examinations met the inclusion and exclusion criteria. The examinations and our institutional DRLs for our Toshiba scanner (established as median value of CTDIvol and DLP), were distributed as CT chest contrast (n=67, 25.6%, 6mGy, 219.1mGy.cm), CT chest non-contrast (n=41, 15.6%, 5.7mGy, 190.6 mGy), CT abdomen/pelvis contrast (single phase) (n=49, 18.7%, 6.5 mGy, 330.5 mGy.cm), CT abdomen/pelvis contrast (multi-phase) (n=33, 12.6%, 8.93 mGy, 1037.5 mGy.cm), CT abdomen/pelvis non-contrast (n=12, 4.6%, 10.1 mGy, 289.9 mGy.cm) and CT chest and abdomen/pelvis (n=60, 22.9%, 7.15 mGy, 619.4mGy.cm). Conclusions: The preliminary data provided information that our own institution and others can use for quality improvement activities. Future research is required to allow for further analysis to include more CT examinations in various scanners.

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Diagnostic reference levels and patient doses in computed tomography examinations in Greece

Cited by 29 publications

References 3 publications

Pulmonary embolism in pregnant patients: Assessing organ dose to pregnant phantom and its fetus during lung imaging

Pulmonary embolism in pregnant patients: Assessing organ dose to pregnant phantom and its fetus during lung imaging

U.S. Diagnostic Reference Levels and Achievable Doses for 10 Adult CT Examinations

Establishment of facility reference level in computed tomography in selective examinations in a single institution in South Australia: A preliminary study

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