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Spots Global Cancer Trial Database for Low Dose Molecular Breast Imaging as a Screening Tool for Women With Dense Breasts

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Trial Identification

Brief Title: Low Dose Molecular Breast Imaging as a Screening Tool for Women With Dense Breasts

Official Title: Evaluation of Low-dose Molecular Breast Imaging as a Screening Tool in Women With Mammographically Dense Breasts and Increased Risk of Breast Cancer

Study ID: NCT01925170

Conditions

Breast Cancer

Study Description

Brief Summary: A new test for breast cancer screening, molecular breast imaging (MBI) may be more sensitive than mammography for detecting breast cancer in women with dense breasts. The purpose of this study is to see if MBI using a low dose of gamma radiation can find cancers not seen on mammography. Hypotheses: 1. Low-Dose MBI has a significantly higher sensitivity and specificity and equal or higher positive predictive value than SM in women age 40 and older with mammographically dense breasts. 2. Low-dose MBI has comparable sensitivity and specificity to that previously achieved with MBI using a higher dose of radiation. 3. MBI produces a low false positive rate (specificity \>90%) that permits its use as a screening tool in this patient population.

Detailed Description: A previous study demonstrated that the addition of MBI using 20 mCi Tc-99m sestamibi to screening mammography (SM) increased diagnostic yield for breast cancer in dense breasts (supplemental yield of 7.5/1000 screened). After implementing radiation dose reduction techniques, the performance of incident SM and prevalent screen MBI in women with dense breasts will be compared. Methods: Women presenting for SM with heterogeneously or extremely dense breasts on past prior SM were enrolled and underwent digital SM and MBI. Study information was sent to all eligible patients in advance of their scheduled SM explaining the study and offering them participation. Eligible patients who requested to participate were offered an MBI on the same day as their SM or within 21 days of the SM. Participants may have participated in this screening study up to two times provided at least 24 months had elapsed since the initial MBI scan. This time period was selected as the average time for a tumor to double in size is approximately 20 months. Hence a 24 month time interval between MBI studies was to enable detection of interval cancers or cancers that were too small to be detected in the initial MBI scan. MBI was performed with 8 mCi Tc-99m sestamibi and dual-head cadmium zinc telluride detectors. SMs were read independently; MBIs were read in comparison with SM. MBIs were assigned an assessment score of 1-5 which parallels BI-RADS; scores of 3-5 on MBI were considered positive.

Eligibility

Minimum Age: 40 Years

Eligible Ages: ADULT, OLDER_ADULT

Sex: FEMALE

Healthy Volunteers: Yes

Locations

Mayo Clinic, Rochester, Minnesota, United States

Contact Details

Name: Deborah J Rhodes, M.D.

Affiliation: Mayo Clinic

Role: PRINCIPAL_INVESTIGATOR

Useful links and downloads for this trial

Clinicaltrials.gov

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