Photo-Acoustic and Ultrasonographic Mammoscope
PAUS
Photo-Acoustic and Ultrasound MammoScope to Detect Breast Lesions: The PAUS Study
1 other identifier
interventional
180
1 country
1
Brief Summary
The aim of this study is to evaluate the negative predictive value of the Photo Acoustic Imager 3+ (PAM3+) in the detection of female breast lesions (malignant and benign)in an outpatient setting.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for phase_2
Started Feb 2026
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
Study Start
First participant enrolled
February 1, 2026
CompletedFirst Submitted
Initial submission to the registry
March 11, 2026
CompletedFirst Posted
Study publicly available on registry
March 25, 2026
CompletedPrimary Completion
Last participant's last visit for primary outcome
December 31, 2027
ExpectedStudy Completion
Last participant's last visit for all outcomes
April 1, 2028
March 25, 2026
March 1, 2026
1.9 years
March 11, 2026
March 19, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
PAM3+ performance
To evaluate the performance of the PAM3+ system in breast imaging. Performance is defined as the negative predictive value in the detection of breast lesions (malignant and benign).
through study completion, an average of 1 year
Secondary Outcomes (12)
Sensitivity
through study completion, an average of 1 year
Positive predictive value
through study completion, an average of 1 year
Specificity of the PAM3+
through study completion, an average of 1 year
Differences in Performance
through study completion, an average of 1 year
Accuracy
through study completion, an average of 1 year
- +7 more secondary outcomes
Study Arms (1)
All patients
EXPERIMENTALAll patients included in this study will undergo measurements with the PAM3+ imager.
Interventions
Patients will lay in prone position on the PAM3+ with one breast at a time in the aperture of the machine. The breast is supported by a plastic cup that holds the breast in place. The aperture/bowl is filled with water. During the measurement, infrared light will be emitted onto the breast. Infrared light will be absorpted by red blood cells which results in contrast compared to its surroundings and it will cause minuscule movements in the surrounding water. These movements will be detected by the ultrasound detectors. The movements and the absorption together will create a 3D image of the breast.
Eligibility Criteria
You may qualify if:
- Women
- Age \> 18 years
- Referred to the outpatient breast clinic of the Franciscus Vlietland Hospital due to a possible breast lesion
- Patients who are fully competent to give written informed consent
- Sufficient knowledge of the Dutch language to complete a questionnaire
You may not qualify if:
- Currently undergoing chemotherapy
- Discharge from the nipple(s)
- Breast ulcers or -wounds
- Currently suffering from mastitis
- Carrier of a resistant bacterium (e.g. Methicillin-resistant Staphylococcus aureus (MRSA) or Multidrug resistant organisms (MDRO; in Dutch: BRMO)
- Irremovable piercings on/in the breast
- Pregnancy
- Patients whose breasts do not fit in the cup sizes (small breasts can be measured without a cup)
- Currently using medication that increases photo-toxicity of the skin or skin care products that increase photosensitivity (e.g. certain antibiotics: tetracyclines or quinolones, certain antidiuretics
- A history of photosensitive disease (e.g. porphyria, lupus erythematosus)
- Currently undergoing therapy for a photosensitive disease and experiencing photosensitive disease
- Currently undergoing phototherapy
- Patients with a known allergy for PVC
- Patients that are not physically capable of climbing on the examination bed
- Patients that are not physically capable of laying on the examination bed during the measurements
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Franciscus Vlietland Ziekenhuis
Schiedam, South Holland, 3118 JH, Netherlands
Study Officials
- PRINCIPAL INVESTIGATOR
T.M.A.L. Klem, MD, PhD
Franciscus Gasthuis & Vlietland
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- phase 2
- Allocation
- NA
- Masking
- NONE
- Masking Details
- The PAM3+ outcomes will be assessed by an analyst that is completely masked from all other diagnostic imaging results. After receiving output from the analyst, full results will be (pseudo)anonymously shared with the analyst.
- Purpose
- DIAGNOSTIC
- Intervention Model
- SINGLE GROUP
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- MD
Study Record Dates
First Submitted
March 11, 2026
First Posted
March 25, 2026
Study Start
February 1, 2026
Primary Completion (Estimated)
December 31, 2027
Study Completion (Estimated)
April 1, 2028
Last Updated
March 25, 2026
Record last verified: 2026-03