Dose Benchmarks for Paediatric Head Computed Tomography Examination in Nigeria

Ekpo, Ernest U.; Adejoh, Thomas; Erim, Akwa E.

doi:10.1093/rpd/ncz036

Cited by 5 publications

(13 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Radiation dose for FD, LD1, and LD2 image series was calculated using the dose length product (DLP)—conversion factor method, where the effective dose E = DLP *anatomic area conversion factor. 7,20…”

Section: Methodsmentioning

confidence: 99%

Iterative reconstruction improves image quality and reduces radiation dose in trauma protocols; A human cadaver study

Godt

Johansen

Martinsen

et al. 2021

Acta Radiologica Open

View full text Add to dashboard Cite

Background Radiation-related cancer risk is an object of concern in CT of trauma patients, as these represent a young population. Different radiation reducing methods, including iterative reconstruction (IR), and spilt bolus techniques have been introduced in the recent years in different large scale trauma centers. Purpose To compare image quality in human cadaver exposed to thoracoabdominal computed tomography using IR and standard filtered back-projection (FBP) at different dose levels. Material and methods Ten cadavers were scanned at full dose and a dose reduction in CTDIvol of 5 mGy (low dose 1) and 7.5 mGy (low dose 2) on a Siemens Definition Flash 128-slice computed tomography scanner. Low dose images were reconstructed with FBP and Sinogram affirmed iterative reconstruction (SAFIRE) level 2 and 4. Quantitative image quality was analyzed by comparison of contrast-to-noise ratio (CNR) and signal-to-noise ratio (SNR). Qualitative image quality was evaluated by use of visual grading regression (VGR) by four radiologists. Results Readers preferred SAFIRE reconstructed images over FBP at a dose reduction of 40% (low dose 1) and 56% (low dose 2), with significant difference in overall impression of image quality. CNR and SNR showed significant improvement for images reconstructed with SAFIRE 2 and 4 compared to FBP at both low dose levels. Conclusions Iterative image reconstruction, SAFIRE 2 and 4, resulted in equal or improved image quality at a dose reduction of up to 56% compared to full dose FBP and may be used a strong radiation reduction tool in the young trauma population.

show abstract

Section: Methodsmentioning

confidence: 99%

Iterative reconstruction improves image quality and reduces radiation dose in trauma protocols; A human cadaver study

Godt

Johansen

Martinsen

et al. 2021

Acta Radiologica Open

View full text Add to dashboard Cite

show abstract

“…The pattern repeated itself in the 75th percentile of median values for CTDIvol (60/62 mGy) and DLP (1210/1288 mGy-cm). The mean is useful for inter-facility peer review, while the 75th percentile is useful for benchmarking [10]. Further interrogation of the mean with a paired-sample t-test gave a statistically significant difference in the CTDIvol (p = 0.001).…”

Section: Discussionmentioning

confidence: 99%

“…However, effective dose, an indicator of risk from ionizing radiation, is generally calculated from DLP [10,19]. So, good practice with CTDIvol does not necessarily translate to optimum radiation protection for the patient.…”

Section: Discussionmentioning

confidence: 99%

“…Only non-contrast examinations showing skull outline free of distortions due to trauma, pathology or congenital anomaly were included. Although a minimum of 10 cases is considered admissible for dose assessment [10], much more was included by the researchers.…”

Section: Methodsmentioning

confidence: 99%

“…Pediatric patients are worse off due to relatively smaller body surface area, greater tissue radiosensitivity, and higher lifetime attributable cancer risks [3,4]. Evidence of increased risk of malignancy amongst children subjected to CT examinations, and increasing demand for CT investigations is of serious concern to the scientific community [4,9,10]. Head requisitions are the most common due to trauma or space-occupying lesions [11,12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

How well Nigerian radiographers adhere to pediatrics-specific protocols during computed tomography procedures

Adejoh¹,

Ezugwu²,

Erondu³

et al. 2022

rmj

View full text Add to dashboard Cite

INTRODUCTION: Enormously high-dose procedures such as computed tomography requires pediatrics-specific protocols due to high tissue radio-sensitivity and higher lifetime attributable cancer risks. It’s not known if radiographers in Nigeria consider this fact at all times.This work aimed to survey head computed tomography dose in Nigeria for evidence of pediatric- specific practice. METHODS: The census of CT scanners was undertaken prospectively across the country from June 2019 to September 2021, while the dose survey was undertaken retrospectively in 14 facilities distributed evenly across the geopolitical zones between February to September 2021. Data on computed tomography installations were supplied by radiographers spread across the country. A dose survey involving 490 and 700 pediatrics and adult patients emanated from fourteen of those facilities. Doses were extracted from on-screen volumetric CT dose index (CTDIvol) and dose- length product (DLP) in non-contrast investigations. RESULTS: There were 209 CT scanners installed in Nigeria as of September 2021, with a triennial growth rate of 12.4% (n = 26). Monthly patient throughput for all CT requests was ≤ 41,412 with pediatric cases accounting for 10.4 % (n = 4,311). Mean head dose for pediatrics and adults with CTDIvol (41/58 mGy) and DLP (922/1198 mGy-cm) appeared different prima facie. However, a paired - sample t-test gave statistically significant difference in the CTDIvol (p = 0.001), but not with DLP (p = 0.055). CONCLUSION: The installation of CT scanners is on the increase in Nigeria. Pediatric and adult CT dose had minimal differences. Given the higher lifetime attributable cancer risks for pediatrics, this should be worrisome. This calls for pediatric- specific protocol design and enforcement by relevant regulatory agencies, as well as meticulous optimization of protection from radiation by radiation practitioners.

show abstract

Paediatric diagnostic reference levels for common computed tomography procedures: A systematic review

Garba,

Engel-Hills

2025

Radiography

View full text Add to dashboard Cite

Dose Benchmarks for Paediatric Head Computed Tomography Examination in Nigeria

Cited by 5 publications

References 27 publications

Iterative reconstruction improves image quality and reduces radiation dose in trauma protocols; A human cadaver study

Iterative reconstruction improves image quality and reduces radiation dose in trauma protocols; A human cadaver study

How well Nigerian radiographers adhere to pediatrics-specific protocols during computed tomography procedures

Paediatric diagnostic reference levels for common computed tomography procedures: A systematic review

Contact Info

Product

Resources

About