Evidence map›Paper›PMID 26043158›Full record

ArticleThe British journal of radiology2015

Survey of volume CT dose index in Japan in 2014.

Y Matsunaga, A Kawaguchi, K Kobayashi, Y Kinomura, M Kobayashi, Y Asada, K Minami, S Suzuki, K Chida

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Article in The British journal of radiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Y Matsunaga1 Department of Imaging, Nagoya Kyoritsu Hospital, Nagoya, Aichi, Japan.
A Kawaguchi2 Graduate school of Medicine, Tohoku University, Sendai, Miyagi, Japan.
K Kobayashi4 Department of Radiology, Fujita Health University Hospital, Toyoake, Aichi, Japan.
Y Kinomura4 Department of Radiology, Fujita Health University Hospital, Toyoake, Aichi, Japan.
M Kobayashi5 School of Health Sciences, Fujita Health University, Toyoake, Aichi, Japan.
Y Asada4 Department of Radiology, Fujita Health University Hospital, Toyoake, Aichi, Japan.
K Minami5 School of Health Sciences, Fujita Health University, Toyoake, Aichi, Japan.
S Suzuki5 School of Health Sciences, Fujita Health University, Toyoake, Aichi, Japan.
K Chida2 Graduate school of Medicine, Tohoku University, Sendai, Miyagi, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThe aims of this study are to propose a new set of Japanese diagnostic reference levels (DRLs) for 2014 and to study the impact of tube voltage and the type of reconstruction algorithm on patient doses. The volume CT dose index (CTDI(vol)) for adult and paediatric patients is assessed and compared with the results of a 2011 national survey and data from other countries.

methodsScanning procedures for the head (non-helical and helical), chest and upper abdomen were examined for adults and 5-year-old children. A questionnaire concerning the following items was sent to 3000 facilities: tube voltage, use of reconstruction algorithms and displayed CTDI(vol).

resultsThe mean CTDI(vol) values for paediatric examinations using voltages ranging from 80 to 100 kV were significantly lower than those for paediatric examinations using 120 kV. For adult examinations, the use of iterative reconstruction algorithms significantly reduced the mean CTDI(vol) values compared with the use of filtered back projection. Paediatric chest and abdominal scans showed slightly higher mean CTDI(vol) values in 2014 than in 2011. The proposed DRLs for adult head and abdominal scans were higher than those reported in other countries.

conclusionThe results imply that further optimization of CT examination protocols is required for adult head and abdominal scans as well as paediatric chest and abdominal scans. ADVANCES IN KNOWLEDGE: Low-tube-voltage CT may be useful for reducing radiation doses in paediatric patients. The mean CTDI(vol) values for paediatric scans showed little difference that could be attributed to the choice of reconstruction algorithm.

Indexed as

AdultChild, PreschoolCone-Beam Computed TomographyHumansJapanRadiation DosageReference ValuesSurveys and Questionnaires

Identifiers

PMID26043158
PMCPMC4651388

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Registered trials

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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.