Evidence map›Paper›PMID 34532817›Full record

ArticlePediatric radiology2021

Patient-level dose monitoring in computed tomography: tracking cumulative dose from multiple multi-sequence exams with tube current modulation in children.

Azadeh Tabari, Xinhua Li, Kai Yang, Bob Liu, Michael S Gee, Sjirk J Westra

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Article in Pediatric radiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

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2citing papers in PubMed
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1 · What the graph read from it

What it found

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2 · The registry

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3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Azadeh TabariDepartment of Radiology, Massachusetts General Hospital, 34 Fruit St., Boston, MA, 02114, USA.
Xinhua LiDepartment of Radiology, Massachusetts General Hospital, 34 Fruit St., Boston, MA, 02114, USA.
Kai YangDepartment of Radiology, Massachusetts General Hospital, 34 Fruit St., Boston, MA, 02114, USA.
Bob LiuDepartment of Radiology, Massachusetts General Hospital, 34 Fruit St., Boston, MA, 02114, USA.
Michael S GeeDepartment of Radiology, Massachusetts General Hospital, 34 Fruit St., Boston, MA, 02114, USA.
Sjirk J WestraDepartment of Radiology, Massachusetts General Hospital, 34 Fruit St., Boston, MA, 02114, USA. swestra@partners.org.ORCID 0000-0002-9952-6891

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIn children exposed to multiple computed tomography (CT) exams, performed with varying z-axis coverage and often with tube current modulation, it is inaccurate to add volume CT dose index (CTDI

objectiveTo introduce the patient-size-specific z-axis dose profile and its dose line integral (DLI) as new dose metrics, and to use them to compare cumulative dose calculations against conventional measures. MATERIALS AND

methodsIn all children with 2 or more abdominal-pelvic CT scans performed from 2013 through 2019, we retrospectively recorded all series kV, z-axis tube current profile, CTDI

resultsWe recorded dose data in 143 series obtained in 48 children, ages 0-2 years (n=15) and 8-16 years (n=33): ΣSSDE 12.7±6.7 and peak dose 15.1±8.1 mGy, ΣDLP 278±194 and ΣDLI 550±292 mGy·cm. Peak dose exceeded ΣSSDE by 20.6% (interquartile range [IQR]: 9.9-26.4%, P<0.001), and ΣDLI exceeded ΣDLP by 114% (IQR: 86.5-147.0%, P<0.001).

conclusionOur methodology represents a novel approach for evaluating radiation exposure in recurring pediatric abdominal CT examinations, both at the individual and population levels. Under a wide range of patient variables and acquisition conditions, graphic depiction of the cumulative z-axis dose profile across and beyond scan ranges, including the peak dose of the profile, provides a better tool for cumulative dose documentation than simple summations of SSDE. ΣDLI is advantageous in characterizing overall energy absorption over ΣDLP, which significantly underestimated this in all children.

Indexed as

PelvisTomography, X-Ray ComputedChildChild, PreschoolHumansInfantInfant, NewbornPhantoms, ImagingRadiation DosageRetrospective StudiesAbdomenChildrenComputed tomographyCumulative radiation doseQuality improvementRadiation safety

Identifiers

PMID34532817

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.