Comparison of the Variability of Hepatic Load Quantification in Iron and Fat Estimated by MRI at 1.5 and 3 Tesla

N/ACompletedNCT03200457

Rennes University Hospital92 enrolled

Overview

The study proposes to compare the results of two examinations at 1.5 and 3 Tesla obtained on the same day on a series of 80 patients.

Quantification of hepatic iron by MRI is validated at 1.5 Tesla on a small number of subjects with some discrepancies between the two most used techniques (liver to muscle ratio or calculation of the decay rate of the T2 \* signal). Since the initial publications at 1.5 Tesla, new technical innovations have emerged which can allow better quantification. Recently, the investigators have applied these innovations to Rennes and have validated (SURFER study) the possibility of making a quantification of iron and fat on two 3 Tesla devices with good results in a single apnea acquisition. But it is not uncommon to have, in a structure, different magnetic field devices, and it is important to ensure that the results are transposable. It is also crucial for multicentre or cohort studies to ensure consistency. It is therefore proposed to compare the results of two examinations at 1.5 and 3 Tesla obtained on the same day on a series of 80 patients.

Study Type

INTERVENTIONAL

Allocation

Purpose

OTHER

Masking

NONE

Enrollment

Conditions

Iron Hepatic Overload Fat Hepatic Overload

Interventions

1,5 Tesla abdominal MRIDEVICE

Measurement of the fat and iron

3 Tesla abdominal MRIDEVICE

Measurement of the fat and iron

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Adult 18 years of age or older; * Having an MRI indication of iron and fat quantification; * Benefiting from social security; * Having given a free, informed and written consent. Exclusion Criteria: Related to MRI * Implantable cardiac pacemaker or defibrillator; * Non-MRI cardiac valve compatible; * Clips, stents, coils, etc ... no MRI compatible; * Cochlear implants; * Neuronal or peripheral stimulator; * Foreign bodies metallic intra orbital or encephalic, foreign body close to the eyes, wound by metallic lash (war, ball); * Endoprostheses placed for less than 4 weeks and osteosynthesis materials placed less than 6 weeks old; * Claustrophobia; * Pumps, tattoos, permanent make-up, intrauterine device, patches; * Metallic, magnetic, non-removable material and close to the analysis field. Other criteria * unstable hemodynamic status, acute respiratory failure, general precarious condition or a need for continuous monitoring incompatible with MRI constraints; * Persons subject to major legal protection (safeguarding justice, guardianship, trusteeship), persons deprived of liberty. * Known pregnancy, breastfeeding.

Locations (2)

Hôpital St Vincent du Groupement des Hôpitaux de l'Institut Catholique de Lille

Lille, France

CHU de Rennes

Rennes, France

Outcomes

Primary Outcomes

Study of the agreement of the measurement of the fat and iron obtained by MRI, based on our previous calibrations (MRQuantif software), on two MRI devices.

Bland and Altman method comparing the quantification of iron and liver fat provided by the two MRI devices in the same patient using the MRQuantif software developed by the imaging department of the University Hospital of Rennes : * a 1.5 Tesla device * a 3 Tesla device

Time frame: Day 1

Secondary Outcomes

Study of the concordance of the estimation of the quantification of the iron and the hepatic fat provided by our method and those of the constructors

Concordance of the estimation of the quantification of the iron and the hepatic fat provided by our method and those of the constructors

Time frame: Day 1

Analysis of the repeatability of the measurement (two acquisitions for each study).

Intraclass correlation coefficients (ICCs) and Bland \& Altmann between two acquisitions

Time frame: Day 1

Analysis of the intra or interobserver reproducibility (several analysis for a single acquisition).

Intraclass correlation coefficients (ICCs) and Bland \& Altmann between two readers/readings

Time frame: Day 1

Data from ClinicalTrials.gov

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