Evidence map›Paper›PMID 26692912›Full record

ArticlePolish journal of radiology2015

PH Measurements of the Brain Using Phosphorus Magnetic Resonance Spectroscopy ((31)PMRS) in Healthy Men - Comparison of Two Analysis Methods.

Monika Cichocka, Justyna Kozub, Andrzej Urbanik

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Article in Polish journal of radiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing 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

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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

12 citing papers in PubMed.

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  2. Use ofAging cell · 2023
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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

3 authors.

Monika CichockaDepartment of Radiology, Collegium Medicum, Jagiellonian University, Cracow, Poland.
Justyna KozubDepartment of Radiology, Collegium Medicum, Jagiellonian University, Cracow, Poland.
Andrzej UrbanikDepartment of Radiology, Collegium Medicum, Jagiellonian University, Cracow, Poland.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIntracellular pH provides information on homeostatic mechanisms in neurons and glial cells. The aim of this study was to define pH of the brain of male volunteers using phosphorus magnetic resonance spectroscopy ((31)PMRS) and to compare two methods of calculating this value. MATERIAL/

methodsIn this study, 35 healthy, young, male volunteers (mean age: 25 years) were examined by (31)PMRS in 1.5 T MR system (Signa Excite, GE). The FID CSI (Free Induction Decay Chemical Shift Imaging) sequence was used with the following parameters: TR=4000 ms, FA=90°, NEX=2. Volume of interest (VOI) was selected depending on the size of the volunteers' brain (11-14 cm(3), mean 11.53 cm(3)). Raw data were analyzed using SAGE (GE) software.

resultsBased on the chemical shift of peaks in the (31)PMRS spectrum, intracellular pH was calculated using two equations. In both methods the mean pH was slightly alkaline (7.07 and 7.08). Results were compared with a t-test. Significant difference (p<0.05) was found between these two methods.

conclusionsThe (31)PMRS method enables non-invasive in vivo measurements of pH. The choice of the calculation method is crucial for computing this value. Comparing the results obtained by different teams can be done in a fully credible way only if the calculations were performed using the same formula.

Indexed as

BrainHealthy VolunteersMagnetic Resonance Spectroscopy

Identifiers

PMID26692912
PMCPMC4659444

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