Comparing Restriction Spectrum Imaging (RSI) to Conventional and Abbreviated Breast MRI for Breast Cancer Screening

Study Overview
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Brief Summary
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This study is looking at a breast cancer screening technique, restriction spectrum imaging (RSI), as a possible alternative to the breast Magnetic Resonance Imaging (MRI) used by most healthcare professionals. The technique involved in this study is: -Restriction Spectrum Imaging (RSI)

Detailed Description
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The primary purpose of this research study is to measure RSI's ability to diagnose breast cancer in comparison to standard breast MRIs. RSI is a technique that has been shown to address the limitations of certain types of MRI exams used to make images of the prostate and brain. RSI is not a FDA-approved technique for screening, but is a type of advanced diffusion technique and diffusion weighted imaging is used as a part of the standard breast MRI. RSI has been shown to improve tumor detection in prostate and brain. For example, a recent pilot study in prostate showed that adding RSI improved the ability to find a certain stage of prostate cancer in comparison to an MRI without the use of the RSI technique. By comparing RSI's ability to diagnose breast cancer, future clinical testing can determine whether RSI is a more efficient way to screen for breast cancer.

Official Title
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Comparing Restriction Spectrum Imaging (RSI) to Conventional and Abbreviated Breast MRI for Breast Cancer Screening

Conditions
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Breast Cancer

Intervention / Treatment
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* Device: MRI
* Device: RSI


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Group 1 will consist of women who present for screening breast MRI: Age >= 18 Female Asymptomatic for breast disease Presenting for routine breast cancer screening with MRI Group 2 will consist of women who presented for a screening mammogram (2D or 3D tomosynthesis) AND who have had a biopsy recommended after diagnostic workup: Age >= 18 Female Asymptomatic for breast disease Presenting for routine breast cancer screening with mammogram (2D or 3D tomosynthesis) and/or ultrasound Biopsy recommended after subsequent diagnostic workup (BI-RADS 4 or 5) Radiologist Reader Participant Inclusion Criteria Must have clinical experience in interpreting breast MRI. Must have interpreted at least 10 breast MRI exams with RSI interpretation. Exclusion Criteria: -Known or suspected renal insufficiency, rendering the participant unable to safely receive intravenous contrast based on institutional clinical protocol. Renal insufficiency for the purposes of exclusion includes any of the following: Failed Chokye questionnaire Known history of end stage renal disease with EGFR<30 mL/min/1.73m2 Point of care (POC) measure of creatinine clearance (eGFR) prior to obtaining the MRI <35. We will perform this POC test as needed per institutional policy for routine MRI if: (a) no creatinine result is available in the OMR within 30 days of the MRI exam, (b) the patient is > 60 years old, or (c) the patient is on hydroxyurea. History of adverse or allergic-like reaction to gadolinium MRI intravenous contrast, rendering the participant unable to safely receive intravenous contrast based on institutional clinical protocol. Presence of MRI unsafe devices or objects which would make having an MRI unsafe, as per institutional clinical protocol. MRI unsafe devices or objects for the purposes of exclusion include but are not limited to certain intracranial aneurysm clips, cardiac pacemaker, and implantable defibrillator devices, metallic heart valve, or coronary artery stents, breast tissue expanders, bio or neurostimulators, pellets and bullets, ocular implants and devices, otologic and cochlear implants. Other devices or metallic objects may be deemed unsafe for MRI at the radiologist's discretion. Unable to tolerate exam (i.e., secondary to untreatable claustrophobia, positioning constraints/unable to lie prone). Body weight exceeds that allowable by the MRI table. Breast biopsy or surgical intervention planned before the test RSI-MRI in this study. Breast implants (silicone or saline). 8. Nursing or thinks she may be or is pregnant, as gadolinium contrast-enhanced MRI is unsafe. We will perform a pregnancy test as needed per institutional policy for routine breast MRI. Per institutional clinical protocol, all females of childbearing potential who are uncertain if they are pregnant or think they are pregnant must have a blood test or urine study within 2 weeks prior to the MRI exam to rule out pregnancy. A female of childbearing potential is any woman, regardless of sexual orientation or prior tubal ligation, who: Has not had a hysterectomy or bilateral oophorectomy OR Has not been naturally post-menopausal for at least 2 years (i.e., has had menses at any time in the preceding 2 years Radiologist Reader Participant -None.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Screening
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: SCREENING MRI<br>Standard MRI procedure will be used. | Device: MRI<br>* A MRI uses a strong magnet to produce detailed pictures of the inside of your body.<br>|
| Experimental: SCREENING MG BI-RADS 4/5<br>RSI is a DWI sequence with a built in distortion-correction technique that can be applied to any diffusion technique using echo planar imaging acquisition. RSI will be performed using pulsed-field gradient, spin-echo, echo planar imaging with multi-shell diffusion data . The b0 images will be collected in both the forward and reverse phase encoding directions to allow for post-processing correction of spatial distortion from magnetic field. | Device: RSI<br>* RSI is a technique that aims to improve the pictures produced during a MRI exam.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Diagnostic accuracy of breast restriction spectrum imaging (RSI) in comparison to conventional breast MRI | We will test the non-inferiority of RSI compared to DCE-MRI using ROC curves created for the BI-RADS score, based on the reader study. | 2 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Diagnostic accuracy of RSI compared to that of abbreviated MRI (Ab-MRI) in breast cancer screening | We will test the non-inferiority of RSI compared to Ab-MRI using ROC curves created for the BI-RADS score, based on the reader study. | 2 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Breast Cancer