Evidence map›Paper›PMID 34258400›Full record

ArticlePhysics and imaging in radiation oncology2021

Visualizing the urethra by magnetic resonance imaging without usage of a catheter for radiotherapy of prostate cancer.

Takaaki Yoshimura, Kentaro Nishioka, Takayuki Hashimoto, Taro Fujiwara, Kinya Ishizaka, Hiroyuki Sugimori, Shoki Kogame, Kazuya Seki, Hiroshi Tamura, Sodai Tanaka and 5 more

Open access · goldAbstract read
In one paragraph

Article in Physics and imaging in radiation oncology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
1.3field-weighted citation impact, top 19% 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

9 citing papers in PubMed, 11 citations in OpenAlex.

  1. Article
  2. PURE-MRI: An international study assessing physician accuracy in delineating the prostate and urethra on prostate MRI.Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology · 2026
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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

15 authors at 2 institutions in 1 country.

Takaaki YoshimuraDepartment of Health Sciences and Technology, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan.
Kentaro NishiokaDepartment of Radiation Medical Science and Engineering, Faculty of Medicine, Hokkaido University, Sapporo, Japan.
Takayuki HashimotoDepartment of Radiation Medical Science and Engineering, Faculty of Medicine, Hokkaido University, Sapporo, Japan.
Taro FujiwaraDepartment of Radiation Technology, Hokkaido University Hospital, Sapporo, Japan.
Kinya IshizakaDepartment of Radiation Technology, Hokkaido University Hospital, Sapporo, Japan.
Hiroyuki SugimoriDepartment of Biomedical Science and Engineering, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan.
Shoki KogameDivision of Radiological Science and Technology, Department of Health Sciences, School of Medicine, Hokkaido University, Sapporo, Japan.
Kazuya SekiDivision of Radiological Science and Technology, Department of Health Sciences, School of Medicine, Hokkaido University, Sapporo, Japan.
Hiroshi TamuraDepartment of Radiation Technology, Hokkaido University Hospital, Sapporo, Japan.
Sodai TanakaDepartment of Medical Physics, Hokkaido University Hospital, Sapporo, Japan.
Yuto MatsuoDepartment of Medical Physics, Hokkaido University Hospital, Sapporo, Japan.
Yasuhiro DekuraDepartment of Radiation Oncology, Faculty of Medicine, Hokkaido University, Sapporo, Japan.
Fumi KatoDepartment of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Sapporo, Japan.
Hidefumi AoyamaDepartment of Radiation Oncology, Faculty of Medicine, Hokkaido University, Sapporo, Japan.
Shinichi ShimizuDepartment of Medical Physics, Hokkaido University Hospital, Sapporo, Japan.
Hokkaido University · JPHokkaido University Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The urethra position may shift due to the presence/absence of the catheter. Our proposed post-urination-magnetic resonance imaging (PU-MRI) technique is possible to identify the urethra without catheter. We aimed to verify the inter-operator difference in contouring the urethra by PU-MRI. The mean values of the evaluation indices of dice similarity coefficient, mean slice-wise Hausdorff distance, and center coordinates were 0.93, 0.17 mm, and 0.36 mm for computed tomography, and 0.75, 0.44 mm, and 1.00 mm for PU-MRI. Therefore, PU-MRI might be useful for identifying the prostatic urinary tract without using a urethral catheter.

Indexed as

Magnetic resonance imagingProstate cancerUrethra-sparing radiotherapy

Identifiers

PMID34258400
PMCPMC8254197
OpenAlexW3149185561

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.