Patient-Assisted Compression in 3D - Impact on Image Quality and Workflow

GE Healthcare36 enrolled

Overview

Patient-assisted compression (PAC) allows the patient to participate in controlling the amount of compression force during mammography and is a personalized approach that has demonstrated successful reduction in discomfort experienced during mammography. General Electric Healthcare's Senographe Pristina, an innovative mammography platform that provides both two-dimensional (2D) and three-dimensional (3D) imaging capabilities, offers both standard and patient-assisted compression modes. This study will evaluate image quality and clinical workflow as it relates to use of PAC with the Senographe Pristina 3D.

The study population will consist of adult asymptomatic women presenting for screening 2D mammography. One breast of each subject will be identified as the "breast of interest," which will undergo study-specific 3D imaging consisting of two-view (craniocaudal and mediolateral oblique) PA compression and image acquisition, followed by two-view technologist-controlled (TC) compression and image acquisition. The breast of interest will be randomly assigned to either the first breast imaged during the exam or the second breast imaged. TC compression and imaging, and procedures performed on the subject's other breast will be conducted per standard of care. Following image acquisition, 3D image quality evaluation will be conducted by Mammography Quality Standards Act-qualified readers. Prior to the reading session, images will be de-identified and the following information will be removed from the DICOM header to blind readers to the compression mode used during acquisition: time stamp, compression force, and breast thickness. The image sets will also be randomized for presentation during the image attribute reviews. Two (2) readers will evaluate each PAC and TC compression image set collected from each subject's breast of interest and assess the acceptability of image attributes, as defined in the Guidance for Industry and FDA Staff - Class II Special Controls Guidance Document: Full-Field Digital Mammography System (2012). A third reader will provide adjudication, if there is disagreement for a given image set's overall clinical image quality. Workflow data, including the incidence of technologist intervention during acquisition and need for repeat image acquisition, will also be collected. The proportion of PAC image sets that are of equal or higher acceptability than TC image sets will be calculated. A 95% confidence interval will be calculated using asymptotic method with continuity correction. The proportion of image sets indicated for repeated image acquisition when using PA mode or TC mode will be summarized. Other endpoint data will be summarized using descriptive statistics. No statistical hypothesis is being tested in this study.

Study Type

Conditions

Breast Cancer

Interventions

Patient-Assisted Compression (PAC)DEVICE

The technologist will properly position the breast and apply minimum compression. The subject will be instructed to apply compression as the technologist ensures the breast tissue is in appropriate position and tautness. The technologist will then guide the subject to achieve appropriate compression level, sufficient but not excessive, and the image will be acquired. This will be done for both standard views Craniocaudal (CC) \& Mediolateral Oblique (MLO).

Technologist-Controlled (TC) CompressionDEVICE

TC compression will be conducted per standard of care practices at the site.

Eligibility

Sex: FEMALEMin age: 40 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: 1. Are women aged 40 years or older; 2. Are asymptomatic and scheduled for screening mammography; 3. Have left and right breasts; 4. Have breast sizes compatible with the dimensions of a 24 x 31 cm image detector, without anatomical cut-off; 5. Are documented as non-pregnant based on the investigator's medical judgment and in consideration of local clinical practice standards for evidence of non-pregnancy; 6. Are able and willing to comply with study procedures; and 7. Are able and willing to provide written informed consent to participate. Exclusion Criteria: 1. Are women aged 40 years or older; 2. Are asymptomatic and scheduled for screening mammography; 3. Have left and right breasts; 4. Have breast sizes compatible with the dimensions of a 24 x 31 cm image detector, without anatomical cut-off; 5. Are documented as non-pregnant based on the investigator's medical judgment and in consideration of local clinical practice standards for evidence of non-pregnancy; 6. Are able and willing to comply with study procedures; and 7. Are able and willing to provide written informed consent to participate.

Locations (1)

Boca Raton Regional Hospital

Boca Raton, Florida, United States

Outcomes

Primary Outcomes

Percentage of Acceptable Overall Image Quality

The primary objective is to compare the percentage of acceptable overall image quality in unilateral two-view (CC and MLO) breast images acquired using Patient-Assisted Compression and Technologist Compression modes.

Time frame: 1 Day

Secondary Outcomes

Number of Repeat Image Acquisitions

To evaluate the need for repeat image acquisition when using Patient-Assisted Compression and Technologist Compression modes.

Time frame: 1 Day

Percentage of Acceptable Mammographic Attributes

To evaluate the percentage of acceptable mammographic attributes for unilateral two-view breast images acquired using Patient-Assisted Compression and Technologist Compression modes.

Time frame: 1 Day

Data from ClinicalTrials.gov

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