MBI and Breast Tomosynthesis Screening Accuracies in Patients With Dense Breast Tissue
In women with heterogeneous or dense breast tissue (mammographic types 3 and 4), MBI (Molecular Breast Imaging) will detect more breast cancers and have greater sensitivity in detecting breast cancer than breast tomosynthesis.
- In women with heterogeneous or dense breast tissue, the specificity of MBI in correctly classifying subjects without breast cancer will be non-inferior to breast tomosynthesis.
- In women with heterogeneous or dense breast tissue, the area under the receiver operating characteristic (ROC) curve for MBI will be non-inferior or superior to breast tomosynthesis.
- Combining the use of MBI and breast tomosynthesis will provide performance superior to either technology alone, as manifest by a superior ROC curve area.
Device: MBI Scan: The LumaGEM®
Device: 3D Mammogram/Breast Tomosynthesis Scan: Selenia® Dimensions®
|Study Design:||Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
|Official Title:||Pilot Study: Dedicated Dual Head Molecular Breast Imaging Compared to Breast Tomosynthesis for Evaluation of Patients With Type 3 or 4 Mammographic Breast Density.|
- Sensitivity/Cancer detection [ Time Frame: 12 months ] [ Designated as safety issue: No ]Sensitivity being the number of scans read or labeled positive (by radiologist) divided by the total cancers confirmed by pathology results (i.e. biopsy).
- Specificity [ Time Frame: 12 months ] [ Designated as safety issue: No ]Specificity being the total number of scans read or labeled as negative (by a radiologist) divided by number of total women without cancer. This "ground truth" of a true negative will involve in a second negative imaging scan at 12 months (follow-up exam).
|Study Start Date:||April 2014|
|Estimated Study Completion Date:||October 2015|
|Estimated Primary Completion Date:||October 2015 (Final data collection date for primary outcome measure)|
Experimental: MBI Scan & Tomosynthesis Scan
Patients will receive both scans.
Device: MBI Scan: The LumaGEM®
The LumaGEM Scanner is a dual-head, MBI scanner that has previously been cleared for medical marketing (510(k) number K111791), and has been used to image more than 5,000 patients to date. The LumaGEM MBI scanner is used as a diagnostic adjunct to mammography screening for problem cases The efficacy of MBI has been well documented in clinical trials. The LumaGEM MBI scanner is a dual-head, small field-of-view (FOV) device for developing an MBI image of Tc99m-Sestamibi uptake within the breast. The device consists of solid-state detectors, a data acquisition system, and a computer. The detectors are also used to immobilize the breast during image acquisition by mild compression. The detectors are housed in two heads that are positioned on both sides of a compressed breast.Device: 3D Mammogram/Breast Tomosynthesis Scan: Selenia® Dimensions®
The breast tomosynthesis procedure involves x-ray imaging of the breast using a moving x-ray source and digital detectors composed of cesium iodide crystals on an amorphous silicon layer or of solely selenium in order to produce an image of the breast. This procedure is considered to basically be a modification of mammography and also is used as a diagnostic adjunct to mammography screening for problem cases.