Artificial Intelligence in Mammography Screening in Norway (AIMS Norway)
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ClinicalTrials.gov Identifier: NCT06032390 |
Recruitment Status :
Not yet recruiting
First Posted : September 13, 2023
Last Update Posted : September 13, 2023
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Condition or disease | Intervention/treatment | Phase |
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Breast Cancer | Other: AI assisted mammography screening interpretation Other: Standard mammography screening interpretation | Not Applicable |
Independent double reading with consensus is the recommended practice for breast cancer screening programs in Europe. This is a time-consuming process and more than 99% of examinations are determined to have a negative final outcome in BreastScreen Norway. However, radiologist still overlook cancers, and review-studies have shown 20-25% of screen-detected and interval cancers to be visible at prior screening mammograms. In Norway and other countries, there is also a shortage of breast radiologists.
Retrospective studies on AI in mammographic screening have shown promising results in the classification of cancer negative and cancer positive examinations. However, prospective studies are needed to elucidate questions concerning AI as a support or replacement for the radiologists in the interpretation process.
In this randomized controlled trial women attending screening and consenting to participate in the study, will be randomized (1:1 allocation) to an intervention or a control group. The screening examination will be performed as usual in both groups. The intervention in the trial is the interpretation procedure.
All examinations will be analyzed by AI. In the intervention group, examinations will be triaged according to risk of malignancy defined by an AI score. Examinations with a low AI score will have a single reading by one radiologist and examinations with a intermediate or high AI score will have an independent double reading by two radiologists. All examinations selected by either one or both radiologist will be discussed at consensus. Examinations with an AI raw score of 9.8 or above will be discussed at consensus independent of the radiologists' interpretation. The radiologists will be blinded to whether the mammograms are interpreted by one or two radiologists. AI risk scores and AI image marking of suspicious calcifications and masses are only provided to the radiologists at consensus, not during independent reading. In the control group, two independent radiologists will interpret all screening examinations according to standard procedure, independent double reading. AI results will not be available at either independent reading or consensus, only for comparison with the intervention group in final analyses.
Screen-detected cancers in the intervention and control arm will be analyzed in terms of non-inferiority.
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 150000 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Intervention Model Description: | Participants will be randomized to an intervention or control arm. AI aided interpretation will be used in the intervention arm but not in the control arm. |
Masking: | Double (Participant, Care Provider) |
Masking Description: | Neither the participant nor the radiologic technician performing the mammography examination will know to what study arm the participant was allocated. Radiologists reading the screening examinations will be blinded to the intervention at initial reading but not at consensus. |
Primary Purpose: | Screening |
Official Title: | Artificial Intelligence in BreastScreen Norway - a Randomized Controlled Trial |
Estimated Study Start Date : | January 2024 |
Estimated Primary Completion Date : | December 2026 |
Estimated Study Completion Date : | June 2033 |
Arm | Intervention/treatment |
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Experimental: Intervention arm
AI assisted mammography screening interpretation
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Other: AI assisted mammography screening interpretation
Screening examinations will be analyzed by the AI system (Transpara, ScreenPoint Medical, Nijmegen, The Netherlands) that assigns each examination a cancer risk score 1-10. Examinations with a score 1-7 will be single read and examinations with score 8-10 will be double read. Examinations selected by one or two readers will be discussed in consensus. Examinations with an AI score of 9.8 and above will be selected to consensus by default. Risk scores and AI image markings are provided to the readers only in consensus. The readers will decide whether to recall the woman for further assessment in consensus (standard procedure). |
Active Comparator: Control arm
Standard mammography screening interpretation (standard procedure)
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Other: Standard mammography screening interpretation
Screening examinations will be assessed according to standard of care: independently double read, examinations selected by one or two readers will be discussed in consensus, and the readers will decide whether to recall the woman for further assessment. Screening examinations will be analyzed by the AI system but the results will not be made available to the radiologist, only used for comparison to the intervention group in results analyses. |
- Screen-detected breast cancers [ Time Frame: 36 months from study start-up ]Number of breast cancers detected at screening per 1000 screening examinations.
- Consensus rate [ Time Frame: 24 months from study start-up ]Proportion of participant discussed in consensus among all participants (%).
- Recall rate [ Time Frame: 24 months from study start-up ]Proportion of women recalled for further assessment among all participants (%).
- Interval breast cancers [ Time Frame: 60 months from study start-up ]Number of interval breast cancers diagnosed per 1000 screening examinations.
- Prognostic and predictive tumor characteristics of screen-detected breast cancer [ Time Frame: 36 months from study start-up ]Distribution of tumor characteristics among the participants with screen-detected breast cancer.
- Prognostic and predictive tumor characteristics of interval breast cancer [ Time Frame: 60 months from study start-up ]Distribution of tumor characteristics among the participants with interval breast cancer.
- Sensitivity [ Time Frame: 60 months from study start-up ]Proportion of true positives among true positive and false negatives (%).
- Specificity [ Time Frame: 60 months from study start-up ]Proportion of true negatives among true negatives and false positives (%).
- Mammographic features of screen-detected breast cancer [ Time Frame: 36 months from study start-up ]Distribution of characteristics of tumors observed on the mammograms of participants diagnosed with screen-detected breast cancer.
- Time spent screen-reading [ Time Frame: 36 months from study start-up ]Time (minutes:seconds) spent by the individual radiologists interpreting screening mammograms
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Ages Eligible for Study: | 50 Years to 69 Years (Adult, Older Adult) |
Sexes Eligible for Study: | Female |
Accepts Healthy Volunteers: | Yes |
Inclusion Criteria:
- Women attending the population-based mammography screening program BreastScreen Norway providing a signed, informed consent
Exclusion Criteria:
- Women attending the population-based mammography screening program BreastScreen Norway not providing a signed, informed consent, or with breast implants
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT06032390
Contact: Solveig Hofvind, PhD | 22928828 ext +47 | sshh@kreftregisteret.no | |
Contact: Åsne S Holen, MSc | asho@kreftregisteret.no |
Principal Investigator: | Solveig Hofvind, PhD | Cancer Registry of Norway |
Responsible Party: | Cancer Registry of Norway |
ClinicalTrials.gov Identifier: | NCT06032390 |
Other Study ID Numbers: |
366405 |
First Posted: | September 13, 2023 Key Record Dates |
Last Update Posted: | September 13, 2023 |
Last Verified: | June 2023 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Plan Description: | Data will not be shared outside the project group. |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
Product Manufactured in and Exported from the U.S.: | No |
Breast Cancer Screening Digital Mammography Artificial Intelligence Randomized Controlled Trial |
Breast Neoplasms Neoplasms by Site Neoplasms Breast Diseases Skin Diseases |