Evidence map›Paper›PMID 28792653›Full record

ArticleJournal of magnetic resonance imaging : JMRI2018

Comparing accuracy and reproducibility of sequential and Hadamard-encoded multidelay pseudocontinuous arterial spin labeling for measuring cerebral blood flow and arterial transit time in healthy subjects: A simulation and in vivo study.

Jia Guo, Samantha J Holdsworth, Audrey P Fan, Marc R Lebel, Zungho Zun, Ajit Shankaranarayanan, Greg Zaharchuk

Abstract readComparative Study
In one paragraph

Article in Journal of magnetic resonance imaging : JMRI, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing 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

23 citing papers in PubMed.

  1. Article
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  5. Article
  6. Article
  7. Review
  8. Simultaneous perfusion, diffusion, TMagnetic resonance in medicine · 2024
    Article
  9. Article
  10. Article
  11. Article
  12. Multidelay ASL of the pediatric brain.The British journal of radiology · 2022
    Review
  13. Article
  14. Article
  15. Optimized cervical spinal cord perfusion MRI after traumatic injury in the rat.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2021
    Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Cigarette smoking and cerebral blood flow in a cohort of middle-aged adults.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2019
    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.

Jia GuoDepartment of Radiology, Stanford University, Stanford, California, USA.
Samantha J HoldsworthDepartment of Radiology, Stanford University, Stanford, California, USA.
Audrey P FanDepartment of Radiology, Stanford University, Stanford, California, USA.
Marc R LebelGE Healthcare, Calgary, Canada.
Zungho ZunDiagnostic Imaging and Radiology, Children's National Medical Center, Washington, DC, USA.
Ajit ShankaranarayananGE Healthcare, Menlo Park, California, USA.
Greg ZaharchukDepartment of Radiology, Stanford University, Stanford, California, USA.

Funding

X-RAY COMPATIBLE RF-COIL FOR MR IMAGINGP41RR009784 · NCRR · STANFORD UNIVERSITY · PI GLOVER, GARY H · 1995 to 2011
$15.0M
Quantifying Collateral Perfusion in Cerebrovascular DiseaseR01NS066506 · NINDS · STANFORD UNIVERSITY · PI ZAHARCHUK, GREGORY GEORGE · 2009 to 2017
$4.9M
NCRR NIH HHS P41 RR009784NINDS NIH HHS R01 NS066506
6 · The paper itself

Abstract

purposeTo compare performance of sequential and Hadamard-encoded pseudocontinuous arterial spin labeling (PCASL). MATERIALS AND

methodsMonte Carlo simulations and in vivo experiments were performed in 10 healthy subjects. Field strength and sequence: 5-delay sequential (5-del. Seq.), 7-delay Hadamard-encoded (7-del. Had.), and a single-delay (1-del.) PCASL, without and with vascular crushing at 3.0T. The errors and variations of cerebral blood flow (CBF) and arterial transit time (ATT) from simulations and the CBF and ATT estimates and variations in gray matter (GM) with different ATT ranges were compared. Pairwise t-tests with Bonferroni correction were used.

resultsThe simulations and in vivo experiments showed that 1-del. PCASL underestimated GM CBF due to insufficient postlabeling delay (PLD) (37.2 ± 8.1 vs. 47.3 ± 8.5 and 47.3 ± 9.0 ml/100g/min, P ≤ 6.5 × 10

conclusionThe theoretical signal-to-noise ratio (SNR) gain through Hadamard encoding was confirmed experimentally. For 1-del., a PLD of 1.8 seconds is recommended for healthy subjects. With current parameters, 5-del. Seq. was more reproducible for CBF, and 7-del. Had. for ATT. Vascular crushing may help reduce variations in multidelay experiments without compromising tissue CBF or ATT measurements. LEVEL OF EVIDENCE: 1 Technical Efficacy: Stage 2 J. Magn. Reson. Imaging 2018;47:1119-1132.

Indexed as

Signal Processing, Computer-AssistedAdultBlood Flow VelocityCerebrovascular CirculationComputer SimulationFemaleHumansMagnetic Resonance ImagingMaleMiddle AgedReference ValuesReproducibility of ResultsSensitivity and SpecificitySpin LabelsSpin Labelsarterial spin labelingarterial transit timecerebral blood flowmultidelay ASLpseudocontinuous ASLreproducibility

Identifiers

PMID28792653
PMCPMC5807238

What OpenQuestion holds

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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.