Neoplasms

Skin and Connective Tissue Diseases

All Conditions

Breast Neoplasms

Breast Diseases

Skin Diseases

The patient will be placed in the prone position and undergo a standard Gd contrast-enhanced bilateral breast MRI. Immediately after the prone MRI is completed, the patient will be repositioned for the supine MRI. Prior to starting the prone MRI, the study MRI technician/investigator will explain to the patient and practice with the patient the steps needed to transition from the prone to the supine MRI, so as to facilitate a timely transition. Additional MRI images will only take about 10-15 minutes to obtain and will not require a second injection of contrast material.

Prone to Supine MRI

Timothy B Rooney, MD

The purpose of this study is to determine whether a supine MRI obtained immediately after a standard diagnostic prone MRI exam, without a second injection of gadolinium (Gd) contrast material, would be of sufficient quality to allow the Radiologist to define the tumor edges ("segment" the tumor) so that a 3-D image of the tumor can be generated to form a BCL.

The purpose of this study is to find out whether additional MRI images taken with patients in a different position after completing a standard MRI are of sufficient quality to allow a radiologist to identify the edges of the tumor.

These additional MRI images will only take about 10-15 minutes to obtain and will not require a second injection of contrast material.The information gathered in this study will make it more feasible to use a new device called the "breast cancer locator" to help surgeons more accurately remove breast cancers.

The Prone to Supine Breast MRI Trial

Determine what number of cases that can be successfully segmented both from using post-contrast prone MRI images and also from using post contrast supine MRI images.

Compare the signal intensity with that obtained at tumor location on the prone and supine imaging. The amount of enhancement at the tumor site = segmented tumor.

Compare the signal intensity with that obtained in benign tissue surrounding the tumor on the prone and supine imaging.

Mean MRI signal of the segmented tumor divided by the mean MRI signal of the surrounding tissue which has an equal volume to the tumor. The difference between tumor and benign breast tissue is the tumor-to-background ratio

Calculate the additional time needed to obtain supine MRI images. After the completion of Prone imaging, the patient was removed from the MRI, turned over to the supine position, new coils placed, and returned to the MRI for additional imaging. The aggregate time to accomplish these tasks are noted in minutes.

Quantify the perceived comfort level of the prone and supine MRI as reported by participants. A single question using a Likert scale was was used. The scale range was 0 to 5, where 0 = no pain, completely comfortable and 5 = considerable discomfort.

Dartmouth-Hitchcock Medical Center

The patient will be placed in the prone position and undergo a standard Gd contrast-enhanced bilateral breast MRI. Immediately after the prone MRI is completed, the patient will be repositioned for the supine MRI. Prior to starting the prone MRI, the study MRI technician/investigator will explain to the patient and practice with the patient the steps needed to transition from the prone to the supine MRI, so as to facilitate a timely transition. Additional MRI images will only take about 10-15 minutes to obtain and will not require a second injection of contrast material.

Prone to Supine MRI: The patient will be placed in the prone position and undergo a standard Gd contrast-enhanced bilateral breast MRI. Immediately after the prone MRI is completed, the patient will be repositioned for the supine MRI. Prior to starting the prone MRI, the study MRI technician/investigator will explain to the patient and practice with the patient the steps needed to transition from the prone to the supine MRI, so as to facilitate a timely transition. Additional MRI images will only take about 10-15 minutes to obtain and will not require a second injection of contrast material.

Age, Categorical

Sex: Female, Male

Ethnicity (NIH/OMB)

Race (NIH/OMB)

United States

Region of Enrollment

Timothy B Rooney, MD, PI

Radiologist A, number of participants successfully segmented

Prone to Supine MRI Evaluated by Radiologist A

Radiologist B, number of participants successfully segmented

Prone to Supine MRI Evaluated by Radiologist B

Number of Successful Segmentation of Supine MRI Images

Regions of interest (ROIs) for tumor were defined by the radiologist segmentation of tumor in supine and prone positions. ROIs for the surrounding tissue were selected such that tumor and normal regions had equal volumes. The alpha level was assumed to be of 0.05 (dof = 60), and the null hypothesis of equivalence (mu = 0).

Prone Images

Supine Images

One participant was not able to complete both the Prone and Supine Imaging and was excluded.

Enhancement Quantification, as Measured by Signal Intensity - Segmented Tumor

Regions of interest (ROIs) for surrounding tissues were selected as the surrounding benign tissue regions directly adjacent to the segmented tumor regions. Tumor and surrounding regions had equal volumes. The mean surrounding region intensities reported were all calculated from the prone and supine T1-weighted MR images segmented by the radiologist.

Enhancement Quantification, as Measured by Signal Intensity - Tumor Boundary

The ratios of tumor-to-surrounding tissue intensities, as calculated in Secondary Objective Part A, were compared between prone and supine T1-weighted MR image scans.

Enhancement Quantification- Tumor-to-Background Ratio

Time to Position and Obtain Supine Images

Quantify the perceived comfort level of the prone MRI as reported by participants.

Overall Comfort - Prone Participants.

Quantify the perceived comfort level of the supine MRI as reported by participants.

Overall Comfort Participants - Supine

This assessment of overall perceived comfort was added to the study during the study period, and only the last 28 patients evaluated their overall comfort with the prone and supine portions of the examination.

Spots Global Cancer Trial Database for The Prone to Supine Breast MRI Trial

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