Evidence map›Paper›PMID 32412504›Full record

ArticleOptics letters2020

Comparing the fundamental imaging depth limit of two-photon, three-photon, and non-degenerate two-photon microscopy.

Xiaojun Cheng, Sanaz Sadegh, Sharvari Zilpelwar, Anna Devor, Lei Tian, David A Boas

Open access · greenAbstract read
In one paragraph

Article in Optics letters, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
4.5field-weighted citation impact, top 6% 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

19 citing papers in PubMed, 33 citations in OpenAlex.

  1. Article
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  4. Review
  5. Out-of-focus signal rejection forBiomedical optics express · 2025
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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

6 authors at 2 institutions in 1 country.

Xiaojun Cheng
Sanaz Sadegh
Sharvari Zilpelwar
Anna Devor
Lei Tian
David A Boas
Boston University · USUniversity of California San Diego · US

Funding

MICROSCOPIC FOUNDATION OF MULTIMODAL HUMAN IMAGINGR01MH111359 · NIMH · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI DALE, ANDERS M, DEVOR, ANNA · 2016 to 2020
$5.6M
The impact of microvascular (dys)regulation on cerebral flow and oxygen heterogeneityR01NS108472 · NINDS · BOSTON UNIVERSITY (CHARLES RIVER CAMPUS) · PI BOAS, DAVID A, SCHAFFER, CHRIS B · 2018 to 2022
$3.2M
Microscopic Imaging of Tissue Oxygen Delivery Altered by Microvascular ChangesR01EB021018 · NIBIB · MASSACHUSETTS GENERAL HOSPITAL · PI BOAS, DAVID A · 2015 to 2018
$2.9M
NIBIB NIH HHS R01 EB021018NIMH NIH HHS R01 MH111359NINDS NIH HHS R01 NS108472
6 · The paper itself

Abstract

We have systematically characterized the degradation of imaging quality with depth in deep brain multi-photon microscopy, utilizing our recently developed numerical model that computes wave propagation in scattering media. The signal-to-background ratio (SBR) and the resolution determined by the width of the point spread function are obtained as functions of depth. We compare the imaging quality of two-photon (2PM), three-photon (3PM), and non-degenerate two-photon microscopy (ND-2PM) for mouse brain imaging. We show that the imaging depth of 2PM and ND-2PM are fundamentally limited by the SBR, while the SBR remains approximately invariant with imaging depth for 3PM. Instead, the imaging depth of 3PM is limited by the degradation of the resolution, if there is sufficient laser power to maintain the signal level at large depth. The roles of the concentration of dye molecules, the numerical aperture of the input light, the anisotropy factor

Identifiers

PMID32412504
PMCPMC8059139
OpenAlexW3017902160

What OpenQuestion holds

Textmetadata
LicenceTDM
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.