Evidence map›Paper›PMID 30098027›Full record

ArticleMedical physics2018

Predicting lesion size by accumulated thermal dose in MR-guided focused ultrasound for essential tremor.

Yuexi Huang, Nir Lipsman, Michael L Schwartz, Vibhor Krishna, Francesco Sammartino, Andres M Lozano, Kullervo Hynynen

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In one paragraph

Article in Medical physics, 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
3.1field-weighted citation impact, top 8% 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

23 citing papers in PubMed, 59 citations in OpenAlex.

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  17. What happens to brain outside the thermal ablation zones? An assessment of needle-based therapeutic ultrasound in survival swine.International journal of hyperthermia : the official journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group · 2022
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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

7 authors at 3 institutions in 1 country.

Yuexi HuangPhysical Sciences, Sunnybrook Research Institute, 2075, Bayview Avenue, Toronto, ON M4N 3M5, Canada.
Nir LipsmanDivision of Neurosurgery, Sunnybrook Health Sciences Centre, 2075, Bayview Avenue, Toronto, ON M4N 3M5, Canada.
Michael L SchwartzDivision of Neurosurgery, Sunnybrook Health Sciences Centre, 2075, Bayview Avenue, Toronto, ON M4N 3M5, Canada.
Vibhor KrishnaDivision of Neurosurgery, Toronto Western Hospital, 399 Bathurst Street, Toronto, ON M5T 2S8, Canada.
Francesco SammartinoDivision of Neurosurgery, Toronto Western Hospital, 399 Bathurst Street, Toronto, ON M5T 2S8, Canada.
Andres M LozanoDivision of Neurosurgery, Toronto Western Hospital, 399 Bathurst Street, Toronto, ON M5T 2S8, Canada.
Kullervo HynynenPhysical Sciences, Sunnybrook Research Institute, 2075, Bayview Avenue, Toronto, ON M4N 3M5, Canada.
Toronto Western Hospital · CASunnybrook Health Science Centre · CASunnybrook Research Institute

Funding

Ultrasound Therapy Delivery Through Intact SkullR01EB003268 · NIBIB · SUNNYBROOK & WOMEN'S COLL HLTH SCIS CTR · PI HYNYNEN, KULLERVO · 2003 to 2020
$8.2M
Canada Research Chairs ProgramNIBIB NIH HHS R01 EB003268NIH HHS R01-EB003268
6 · The paper itself

Abstract

purposeTo correlate the accumulated thermal dose (ATD) with lesion size in magnetic resonance (MR)-guided focused ultrasound (MRgFUS) thalamotomy to help guide future clinical treatments. MATERIALS AND

methodsThirty-six patients with medication-refractory essential tremor were treated using a commercial MRgFUS brain system (ExAblate 4000, InSightec) in a 3T MR scanner (MR750, GE Healthcare). Intraoperative MR-thermometry was performed to measure the induced temperature and thermal dose distributions (thermal coefficient = -0.00909 ppm/°C). The ATD was calculated over multiple sonications with appropriate corrections for spatial-shifting artifacts. The ATD profile sizes obtained for dose values of 17, 40, 100, 200, and 240 cumulative equivalent minutes at 43°C (CEM) were correlated with the corresponding lesion sizes measured via axial T1- and T2-weighted MR images acquired 1 day post-treatment.

resultsOf a total of 232 included sonications, 83 required corrections for off-resonance-induced spatial-shifting artifacts (correction range = [1.1,2.2] mm). The mean lesion sizes measured on T2-weighted MR images (6.2 ± 1.3 mm, mean ± SD) were 15% larger than those measured on corresponding T1-weighted MR images (5.3 ± 1.2 mm, mean ± SD). The ATD values that provided the best correlations with the measured lesion sizes on T2- and T1-weighted MR images were 100 and 200 CEM, respectively.

conclusionThe ATD was correlated with lesion size measured 1 day following MRgFUS thalamotomy for essential tremor. These data provide useful information for predicting brain lesion size and determining treatment endpoints in future clinical MRgFUS procedures.

Indexed as

Magnetic Resonance ImagingSurgery, Computer-AssistedTemperatureUltrasonic WavesEssential TremorHumansThalamusaccumulated thermal dosehigh-intensity focused ultrasoundMR-thermometrythermal ablationthermal dose

Identifiers

PMID30098027
PMCPMC6181766
OpenAlexW2885289665

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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.