Evidence map›Paper›PMID 29392488›Full record

ArticleInternational urology and nephrology2018

Novel contrast mixture achieves contrast resolution of human bladder wall suitable for T1 mapping: applications in interstitial cystitis and beyond.

Pradeep Tyagi, Joseph Janicki, Chan-Hong Moon, Jonathan Kaufman, Christopher Chermansky

Registry-linked trialAbstract read
In one paragraph

Article in International urology and nephrology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05811377 (Phenotyping Interstitial Cystitis/Bladder Pain Syndrome by ICE-MRI Bladder Permeability Assay), which is not on this map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing 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.

NCT05811377 completednot on this mapstarted 2023, after this paper: background citation

Phenotyping Interstitial Cystitis/Bladder Pain Syndrome by ICE-MRI Bladder Permeability Assay

TypeobservationalSponsorChristopher J Chermansky, MDRan2023 to 2025Enrolled7ConditionsIC - Interstitial CystitisArmsFerumoxytol, Gadobutrol
3 · Its place in the literature

Who cites it

15 citing papers in PubMed.

  1. Article
  2. Review
  3. Article
  4. Review
  5. Radiology of fibrosis part III: genitourinary system.Journal of translational medicine · 2024
    Review
  6. Article
  7. Review
  8. Review
  9. Review
  10. Article
  11. Article
  12. Article
  13. Recent Developments in Imaging in BPS/IC.Current bladder dysfunction reports · 2019
    Article
  14. Review
  15. 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

5 authors.

Pradeep TyagiDepartment of Urology, University of Pittsburgh, E313 Montefiore Hospital, 3459 Fifth Ave, Pittsburgh, PA, 15213, USA. tyagip@upmc.edu.ORCID http://orcid.org/0000-0001-6586-4545
Joseph JanickiLipella Pharmaceuticals Inc, Pittsburgh, PA, USA.
Chan-Hong MoonDepartment of Radiology, Magnetic Resonance Research Center, University of Pittsburgh, Pittsburgh, PA, USA.
Jonathan KaufmanLipella Pharmaceuticals Inc, Pittsburgh, PA, USA.
Christopher ChermanskyDepartment of Urology, University of Pittsburgh, E313 Montefiore Hospital, 3459 Fifth Ave, Pittsburgh, PA, 15213, USA.

Funding

Measuring Bladder Permeability with MRI using a Novel Contrast Agent FormulationR41DK108397 · NIDDK · LIPELLA PHARMACEUTICALS, INC. · PI KAUFMAN, JONATHAN H · 2015 to 2015
$225k
NIDDK NIH HHS 1R41DK108397.NIDDK NIH HHS R41 DK108397
6 · The paper itself

Abstract

purposeInstillation of novel contrast mixture (NCM) was recently shown to improve the contrast resolution of rat bladder wall with high contrast-to-noise ratio (CNR). Here, the clinical safety and the feasibility of NCM-enhanced MRI to achieve artifact-free visualization of human bladder wall suitable for quantitative measurement of the magnetic resonance (MR) longitudinal relaxation time (T1) was assessed.

methodsSix female subjects [two controls and two with Hunner-type interstitial cystitis IC and two with non-Hunner-type IC] consented for MRI at 3 T before and after instillation of NCM [4 mM gadobutrol and 5 mM ferumoxytol in 50 mL of sterile water for injection]. Single breath-hold fast MR acquisition in large readout bandwidth for 5-mm-thick single slice with variable flip angle was applied to minimize the motion and chemical shift artifacts in measurements of bladder wall thickness (BWT), CNR and T1 from 20 pixels.

resultsNCM instillation in subjects did not evoke pain or discomfort. Fourfold increase in bladder wall CNR (*p < 0.02) and pixel size of 0.35 mm with minimal influence of artifacts allowed accurate determination of bladder wall thinning ~ 0.46 mm from 50 mL NCM (*p < 0.05). Pre-contrast bladder wall T1 of 1544 ± 34.2 ms was shortened to 860.09 ± 13.95 ms in Hunner-type IC (*p < 0.0001) relative to only 1257.42 ± 20.59 and 1258.16 ± 6.16 ms in non-Hunner-type IC and controls, respectively.

conclusionFindings demonstrate the safety and feasibility of NCM-enhanced MRI to achieve artifact-free differential contrast and spatial resolution of human bladder wall, which is suitable for measuring BWT and pixel-wise measurement of T1 in post-contrast setting.

Indexed as

Contrast MediaFerrosoferric OxideOrganometallic CompoundsAdministration, IntravesicalAdultAgedCystitis, InterstitialFeasibility StudiesFemaleHumansMagnetic Resonance ImagingMiddle AgedSignal-To-Noise RatioUrinary BladderContrast MediaFerrosoferric OxidegadobutrolOrganometallic CompoundsFerumoxytolGadoliniumHuman bladderMRIT1 mapping

Identifiers

PMID29392488
PMCPMC6028942

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Registered trials

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.