Breast-conserving surgery (lumpectomy) aims to remove cancer while preserving healthy tissue, but up to 20% of patients require a second operation because cancer cells remain at the edge (margin) of the removed tissue. The Spectra-BREAST study evaluates a new optical device that combines hyperspectral imaging (HIS) and Raman spectroscopy (RS) with artificial-intelligence analysis to quickly assess the entire surface of excised breast specimens during surgery. By flagging areas at risk of positive margins in real time, the device may help surgeons remove any remaining cancer in a single procedure. In this prospective, single-arm diagnostic study, surgeons will use the Spectra-BREAST system on freshly resected breast tissue from up to 99 women undergoing lumpectomy for invasive carcinoma or ductal carcinoma in situ. First, the device's cancer-detection algorithms will be trained on 74 specimens with known pathology. Then, in a separate group of patients, the fully integrated device will be tested on all six faces of each lumpectomy specimen and its predictions will be compared against the gold-standard histopathology margin assessment. Key measures include the sensitivity and specificity of the device's margin predictions, the time needed to generate results, and the device's usability in a clinical setting.
Study Type
OBSERVATIONAL
Enrollment
104
Participants' excised breast lumpectomy specimens will be immediately imaged ex vivo using the investigational Spectra-BREAST system, a handheld optical device integrating two modalities Hyperspectral imaging (HSI): HSI captures reflectance spectra across 400-1400 nm over the entire specimen surface (up to 5 × 5 cm field of view). HIS provides spatial maps of tissue chemical composition and morphology to highlight regions suspicious for residual carcinoma. Point-wise Raman spectroscopy (RS): RS will allow to acquire high-resolution molecular fingerprints both at high and low Raman shift on selected "hotspots" flagged by HSI as at risk. RS will be acquired on the surface of the specimens confirming the possible presence of positive margins Spectra-BREAST system will allow to provide a near real time feedback to the surgeon on the presence and position of positive margins allowing a further resection if tissue if needed.
Participants' excised breast lumpectomy specimens will be immediately imaged ex vivo using the investigational Spectra-BREAST system, a handheld optical device integrating two modalities Hyperspectral imaging (HSI): HSI captures reflectance spectra across 400-1400 nm over the entire specimen surface (up to 5 × 5 cm field of view). HIS provides spatial maps of tissue chemical composition and morphology to highlight regions suspicious for residual carcinoma. Point-wise Raman spectroscopy (RS): RS will allow to acquire high-resolution molecular fingerprints both at high and low Raman shift on selected "hotspots" flagged by HSI as at risk. RS will be acquired on the surface of the specimens and using a special needle probe 2 mm below the tissue surface thus confirming the possible presence of positive margins. Spectra-BREAST system will allow to provide a near real time feedback to the surgeon on the presence and position of positive margins allowing a further resection if tissue if needed
Istituti Clinici Scientifici Maugeri IRCCS
Pavia, Lombardy, Italy
RECRUITINGSensitivity and specificity of Spectra-BREAST system margin status prediction
Proportion of resection faces correctly classified by the Spectra-BREAST device as "positive margin" or "negative margin" when compared to gold-standard postoperative histopathology. Sensitivity and specificity will both be calculated independently in Invasive Breast Cancer and in DCIS breast cancer across all specimens in the validation cohort.
Time frame: Within 21 days after surgery (latest expected receipt of the final pathology report).
Concordance of HSI-only versus combined HSI + RS predictions
Percentage agreement between margin classifications made using hyperspectral imaging alone and those made by the integrated HSI + Raman spectroscopy algorithm, relative to histopathology results.
Time frame: During Spectra-BREAST procedure
Time from specimen removal to Spectra-BREAST system result
Time (in minutes) from excision of the lumpectomy specimen to presentation of the Spectra-BREAST margin results.
Time frame: Per specimen, measured intraoperatively
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