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

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.

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