Accuracy of 1.5 T Versus 3 T Magnetic Resonance Arterial Spin Labeling to Measure Renal Blood Flow

Randomized, Clinical Study to Compare Accuracy of 1.5 T Versus 3 T Magnetic Resonance Arterial Spin Labeling to Measure Renal Blood Flow and the Changes of Renal Perfusion Caused by Physiological Stress (Cold Pressor Test).

In this study we want to compare the accuracy of two methods to measure renal perfusion by MRI spin labelling technique: the first measurement done with the 1.5 T MRI versus the second one obtained with the 3.0 T MRI (Siemens MRI device).

Additionally we want to compare the changes of renal perfusion caused by physiological stress. The used stress test is the cold pressor test done at the forehead.

Study Overview

• Status: Completed
• Conditions: Hypertension; Chronic Kidney Disease
• Intervention / Treatment: Other: renal perfusion

Detailed Description

Magnetic resonance imaging based arterial spin labeling is a technique to measure renal blood flow. Renal perfusion measurement is an important tool to analyze renal function and to detect acute kidney injury. The perfusion measurement is based on two data acquisitions, one with a global inversion prepulse followed by one with a slice selective prepulse (FAIR). The prepulses lead to a labeling of blood water spins. In contrast to the global inversion prepulse, the slice selective inversion prepulse only labels the blood water spins inside the kidney but not the inflowing blood water spins. Subtraction of both images therefore reflects the local perfusion. A third image without the FAIR preparation pulse is measured to normalize the signal intensifiers on each patients.

MRI based arterial spin labeling is a noninvasive assessment not using contrast agents to measure the functional parameters of the kidney. This is avoiding serious complications such as acute kidney failure and nephrogenic systemic fibrosis. There is no known negative impact to the patient. In addition we now want to analyze the validity of this MRI-technique by provoking acutely changes of renal plasma flow. As a further provocative maneuver we selected the cold pressor test as a physiological stress test. Forehead cooling activates the sympathetic nervous system and increases blood pressure and heart rate by causing pain. This mechanism has got an impact on renal haemodynamics. To minimize the possible cold injuries we use the 1°C ice water pack only for 60 seconds and avoid the contact to the eyes.

In this study we want to compare the accuracy of two methods to measure renal perfusion by MRI spin labelling technique: the first measurement done with the 1.5 T MRI versus the second one obtained with the 3.0 T MRI (Siemens MRI device).

• Study Type: Interventional
• Enrollment (Actual): 20
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Germany
  • Erlangen, Germany, 91054
    • Clinical Research Unit, Department of Nephrology and Hypertension, University of Erlangen-Nürnberg

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 80 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Male and Female patients are eligible. Females of child bearing potential (WOCBP) are only eligible if pregnancy test at the screening visit is negative and they use adequate contraceptive precautions during the trial.
• Healthy volunteers and patients who have hypertension stage 1 or 2 or patients who have diabetes at a max of 2 oral antidiabetic agents will be included

Exclusion Criteria:

• eGFR ≤ 45 ml/min/1.75m²
• any cardiovascular or cerebrovascular other other severe events within the last 3 months
• arterial hypertension grad > 2 ( blood pressure ≥ 180/110)
• Subject who do not give written consent, that pseudonymous data will be transferred in line with the duty of documentation and the duty of notification according to § 12 and § 13 GCP-V
• Any contraindications to MRI
• Brain aneurysm clip
• Implanted cardiac pacemaker, pacemaker wires or defibrillator
• Prosthetic heart valves
• Cochlear implant
• Ocular foreign body
• Implanted insulin pump,
• Tattoo (as determined by imager)
• agoraphobia

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Diagnostic
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Triple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: 1.5 Tesla MRI; Measurement of renal perfusion by 1.5 Tesla MRI with arterial spin labelling	Other: renal perfusion; measurement of renal perfusion with MRI arterial spin labelling technique
Experimental: 3.0 Tesla MRI; Measurement of renal perfusion by 3.0 Tesla MRI with arterial spin labelling	Other: renal perfusion; measurement of renal perfusion with MRI arterial spin labelling technique

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Accuracy of 1.5 T versus 3 T magnetic resonance arterial spin labeling to measure renal perfusion (ml/min)	Renal function will be measured in ml/min by MRI arterial spin labelling technique.	2 weeks

Collaborators and Investigators

• Sponsor: University of Erlangen-Nürnberg Medical School
• Investigators: Principal Investigator: Roland E. Schmieder, MD, University of Erlangen-Nürnberg

Publications and helpful links

General Publications

• Hammon M, Janka R, Siegl C, Seuss H, Grosso R, Martirosian P, Schmieder RE, Uder M, Kistner I. Reproducibility of Kidney Perfusion Measurements With Arterial Spin Labeling at 1.5 Tesla MRI Combined With Semiautomatic Segmentation for Differential Cortical and Medullary Assessment. Medicine (Baltimore). 2016 Mar;95(11):e3083. doi: 10.1097/MD.0000000000003083.

Study record dates

Study Major Dates

• Study Start (Actual): May 1, 2014
• Primary Completion (Actual): March 1, 2019
• Study Completion (Actual): March 1, 2019

Study Registration Dates

• First Submitted: October 8, 2015
• First Submitted That Met QC Criteria: April 18, 2016
• First Posted (Estimate): April 21, 2016

Study Record Updates

• Last Update Posted (Actual): March 26, 2020
• Last Update Submitted That Met QC Criteria: March 25, 2020
• Last Verified: March 1, 2020

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Urologic Diseases; Renal Insufficiency; Kidney Diseases; Renal Insufficiency, Chronic
• Other Study ID Numbers: MRT2014