Fujifilm Feature Comparison Reader Study to Compare Old vs New Processing

Completed

Conditions: Breast Cancer

Interventions: Device: FBP
Device: ISR

Registration Number: NCT03586583

Lead Sponsor: Fujifilm Medical Systems USA, Inc.

Brief Summary: The purpose of the feature comparison study is to evaluate general mammographic features in images of the same breast when reconstructed with modified (ISR and DVIIm) processing as compared to the original processing (FBP with EDR and MFP).

Detailed Description: This clinical research is a retrospective, feature comparison reader study with an enriched sample of 600 (100 per radiologist) breast screening or diagnostic cases which were selected from the library of mammograms collected under Fujifilm protocol FMSU2013-004A (all subjects previously provided written informed consent agreeing their image data and supporting documentation could be used for future research and investigations).

Six MQSA-qualified and board-certified mammographers representing various experience levels, will be shown DBT images of a breast with the modified processing side-by-side the same breast with the original processing on the ASPIRE Bellus II workstation.. One breast per subject (two views per breast; CC and MLO) will be evaluated by the readers. Readers will be blinded to the image reconstruction and presentation processing methods. Each reader will be given a different sample of cases to review. Approximately 600 total cases (100 cases per reader) will compose the sample. The order of the subjects and location (left or right review workstation high resolution monitor) of the images with modified processing will be randomized for each reader.

The primary objective is the readers' assessment for each of the 7 general mammographic features. The null hypothesis is that the pooled proportion of cases judged as non-inferior with modified image processing is \<0.50, versus the alternative hypothesis that the pooled proportion is \>0.50. If the 95% CI does not contain values \<0.50, then the null hypothesis will be rejected. These hypotheses will be evaluated for each of the 7 general mammographic features. If all 7 null hypotheses are rejected, then it will be concluded that the modified imaging features are non-inferior to the original imaging

Recruitment & Eligibility

Status: COMPLETED

Sex: Female

Target Recruitment: 600

Inclusion Criteria

Female subjects participating in FMSU2013-004A protocol with known clinical status

Exclusion Criteria

Female subjects that did not have known clinical status in FMSU2013-004A

Study & Design

Study Type: OBSERVATIONAL

Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
FBP (old processing)	FBP	Filtered back projection; old processing.
ISR (new processing)	ISR	Iterative super resolution; new processing.

Primary Outcome Measures

Name	Time	Method
Comparison of ISR (Modified Processing) to FBP (Original Processing)	1 day reading session	For each reader, the cases judged as non-inferior with modified processing will be calculated for each feature and each view. Non-inferiority will be defined as a score of equivalence between modified and original or a score indicating the modified image processing is superior. Readers compared several general mammographic features using the following 5-point scale: negative 2 (left image much superior) negative 1 (left image somewhat superior) 0 (left and right images are equivalent) positive 1 (right image somewhat superior) positive 2 (right image much superior)

Secondary Outcome Measures