Evidence map›Paper›PMID 27418429›Full record

ArticleMagnetic resonance in medicine2017

Focal point determination in magnetic resonance-guided focused ultrasound using tracking coils.

Bryant T Svedin, Michael J Beck, J Rock Hadley, Robb Merrill, Joshua T de Bever, Bradley D Bolster, Allison Payne, Dennis L Parker

Abstract read
In one paragraph

Article in Magnetic resonance in medicine, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing 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

7 citing papers in PubMed.

  1. Magnetic Resonance Acoustic Radiation Force Imaging (MR-ARFI).Journal of magnetic resonance imaging : JMRI · 2025
    Review
  2. Article
  3. Article
  4. Evaluation of acoustic-thermal simulations of in vivo magnetic resonance guided focused ultrasound ablative therapy.International journal of hyperthermia : the official journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group · 2024
    Article
  5. Article
  6. Article
  7. 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

8 authors.

Bryant T SvedinRadiology Department, Utah Center for Advanced Imaging Research, University of Utah, Salt Lake City, Utah, USA.
Michael J BeckRadiology Department, Utah Center for Advanced Imaging Research, University of Utah, Salt Lake City, Utah, USA.
J Rock HadleyRadiology Department, Utah Center for Advanced Imaging Research, University of Utah, Salt Lake City, Utah, USA.
Robb MerrillRadiology Department, Utah Center for Advanced Imaging Research, University of Utah, Salt Lake City, Utah, USA.
Joshua T de BeverRadiology Department, Utah Center for Advanced Imaging Research, University of Utah, Salt Lake City, Utah, USA.
Bradley D BolsterRadiology Department, Utah Center for Advanced Imaging Research, University of Utah, Salt Lake City, Utah, USA.
Allison PayneRadiology Department, Utah Center for Advanced Imaging Research, University of Utah, Salt Lake City, Utah, USA.
Dennis L ParkerRadiology Department, Utah Center for Advanced Imaging Research, University of Utah, Salt Lake City, Utah, USA.

Funding

Non-Invasive MRI-Guided HIFU for Breast Cancer TherapyR01CA172787 · NCI · UNIVERSITY OF UTAH · PI PARKER, DENNIS L · 2013 to 2017
$2.7M
Improved MRI temperature imaging using a subject-specific biophysical modelR01EB013433 · NIBIB · UNIVERSITY OF UTAH · PI PARKER, DENNIS L · 2011 to 2014
$1.8M
NCI NIH HHS R01 CA172787NIBIB NIH HHS R01 EB013433
6 · The paper itself

Abstract

purposeTo develop a method for rapid prediction of the geometric focus location in MR coordinates of a focused ultrasound (US) transducer with arbitrary position and orientation without sonicating.

methodsThree small tracker coil circuits were designed, constructed, attached to the transducer housing of a breast-specific MR-guided focused US (MRgFUS) system with 5 degrees of freedom, and connected to receiver channel inputs of an MRI scanner. A one-dimensional sequence applied in three orthogonal directions determined the position of each tracker, which was then corrected for gradient nonlinearity. In a calibration step, low-level heating located the US focus in one transducer position orientation where the tracker positions were also known. Subsequent US focus locations were determined from the isometric transformation of the trackers. The accuracy of this method was verified by comparing the tracking coil predictions to thermal center of mass calculated using MR thermometry data acquired at 16 different transducer positions for MRgFUS sonications in a homogeneous gelatin phantom.

resultsThe tracker coil predicted focus was an average distance of 2.1 ± 1.1 mm from the thermal center of mass. The one-dimensional locator sequence and prediction calculations took less than 1 s to perform.

conclusionThis technique accurately predicts the geometric focus for a transducer with arbitrary position and orientation without sonicating. Magn Reson Med 77:2424-2430, 2017. © 2016 International Society for Magnetic Resonance in Medicine.

Indexed as

TransducersEquipment DesignEquipment Failure AnalysisImage Interpretation, Computer-AssistedMagnetic Resonance Imaging, InterventionalMagneticsPhantoms, ImagingReproducibility of ResultsSensitivity and SpecificityUltrasonic TherapyMRgFUStracker coilsultrasound focus location

Identifiers

PMID27418429
PMCPMC5237622

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Registered trials

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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.