Evidence map›Paper›PMID 31625321›Full record

ArticleJournal of biomedical optics2019

Development of a blood oxygenation phantom for photoacoustic tomography combined with online pO2 detection and flow spectrometry.

Marcel Gehrung, Sarah E Bohndiek, Joanna Brunker

Erratum issuedOpen access · goldAbstract read
In one paragraph

Article in Journal of biomedical optics, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
3.6field-weighted citation impact, top 7% 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

25 citing papers in PubMed, 55 citations in OpenAlex.

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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors at 2 institutions in 1 country.

Marcel GehrungCancer Research UK Cambridge Institute, Li Ka-Shing Centre, Cambridge, United Kingdom.
Sarah E BohndiekCancer Research UK Cambridge Institute, Li Ka-Shing Centre, Cambridge, United Kingdom.
Joanna BrunkerCancer Research UK Cambridge Institute, Li Ka-Shing Centre, Cambridge, United Kingdom.
University of Cambridge · GBCancer Research UK Cambridge Center · GB

Funding

Cancer Research UK 16267Cancer Research UK 16465Cancer Research UK 21142
6 · The paper itself

Abstract

Photoacoustic tomography (PAT) is intrinsically sensitive to blood oxygen saturation (sO2) in vivo. However, making accurate sO2 measurements without knowledge of tissue- and instrumentation-related correction factors is extremely challenging. We have developed a low-cost flow phantom to facilitate validation of PAT systems. The phantom is composed of a flow circuit of tubing partially embedded within a tissue-mimicking material, with independent sensors providing online monitoring of the optical absorption spectrum and partial pressure of oxygen in the tube. We first test the flow phantom using two small molecule dyes that are frequently used for photoacoustic imaging: methylene blue and indocyanine green. We then demonstrate the potential of the phantom for evaluating sO2 using chemical oxygenation and deoxygenation of blood in the circuit. Using this dynamic assessment of the photoacoustic sO2 measurement in phantoms in relation to a ground truth, we explore the influence of multispectral processing and spectral coloring on accurate assessment of sO2. Future studies could exploit this low-cost dynamic flow phantom to validate fluence correction algorithms and explore additional blood parameters such as pH and also absorptive and other properties of different fluids.

Indexed as

Phantoms, ImagingPhotoacoustic TechniquesSpectrophotometryAlgorithmsAnimalsHydrogen-Ion ConcentrationIndocyanine GreenMethylene BlueMiceOximetryOxygenScattering, RadiationIndocyanine GreenMethylene BlueOxygenblood oxygenationflowphantomphotoacoustic tomography

Identifiers

PMID31625321
PMCPMC7005535
OpenAlexW2981195348

What OpenQuestion holds

Textmetadata
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.