Evidence map›Paper›PMID 26125549›Full record

ArticlePloS one2015

National Survey of Radiation Dose and Image Quality in Adult CT Head Scans in Taiwan.

Chung-Jung Lin, Greta S P Mok, Mang-Fen Tsai, Wei-Ta Tsai, Bang-Hung Yang, Chun-Yuan Tu, Tung-Hsin Wu

Open access · goldAbstract readValidation Study
PubMed Full text at PMC Publisher
In one paragraph

Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
0.3field-weighted citation impact, top 36% of its field
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

1 citing paper in PubMed, 5 citations in OpenAlex.

  1. Article
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

7 authors at 5 institutions in 2 countries.

Chung-Jung LinSchool of Medicine, National Yang-Ming University, Taipei, Taiwan; Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan.
Greta S P MokBiomedical Imaging Laboratory, Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau, China.
Mang-Fen TsaiDepartment of Biomedical Imaging and Radiological Sciences, National Yang Ming University, Taipei, Taiwan.
Wei-Ta TsaiDepartment of Biomedical Imaging and Radiological Sciences, National Yang Ming University, Taipei, Taiwan; Department of Radiation Oncology, Tzu Chi General Hospital Dalin Branch, Chiayi, Taiwan; Association of Medical Radiation Technologists, Taipei, Taiwan.
Bang-Hung YangDepartment of Biomedical Imaging and Radiological Sciences, National Yang Ming University, Taipei, Taiwan; Department of Nuclear Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Association of Medical Radiation Technologists, Taipei, Taiwan.
Chun-Yuan TuDepartment of Biomedical Imaging and Radiological Sciences, National Yang Ming University, Taipei, Taiwan; Department of Radiology, Mackay Memorial Hospital, Taipei, Taiwan; Association of Medical Radiation Technologists, Taipei, Taiwan.
Tung-Hsin WuDepartment of Biomedical Imaging and Radiological Sciences, National Yang Ming University, Taipei, Taiwan.
National Yang Ming Chiao Tung University · TWBuddhist Tzu Chi General Hospital · TWNational Yang Ming Chiao Tung University · TWNational Yang Ming University Hospital · TWUniversity of Macau · MO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionThe purpose of the present study was to evaluate the influence of different variables on radiation dose and image quality based on a national database. MATERIALS AND

methodsTaiwan's Ministry of Health and Welfare requested all radiology departments to complete a questionnaire for each of their CT scanners. Information gathered included all scanning parameters for CT head scans. For the present analysis, CT machines were divided into three subgroups: single slice CT (Group A); multi-detector CT (MDCT) with 2-64 slices (Group B); and MDCT with more than 64 slices (Group C). Correlations between computed tomography dose index (CTDI) and signal-to-noise ratio (SNR) with cumulated tube rotation number (CTW(n)) and cumulated tube rotation time (CTW(s)), and sub group analyses of CTDI and SNR across the three groups were performed.

resultsCTDI values demonstrated a weak correlation (r = 0.33) with CTW(n) in Group A. SNR values demonstrated a weak negative correlation (r = -0.46) with CTW(n) in Group C. MDCT with higher slice numbers used more tube potential resulting in higher effective doses. There were both significantly lower CTDI and SNR values in helical mode than in axial mode in Group B, but not Group C.

conclusionCTW(n) and CTW(s) did not influence radiation output. Helical mode is more often used in MDCT and results in both lower CTDI and SNR compared to axial mode in MDCT with less than 64 slices.

Indexed as

AdultData Interpretation, StatisticalHeadHumansMultidetector Computed TomographyQuality ControlRadiation DosageSignal-To-Noise RatioSurveys and QuestionnairesTaiwanTomography, Spiral ComputedTomography, X-Ray Computed

Identifiers

PMID26125549
PMCPMC4488422
OpenAlexW2218455459

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.