The primary objective of this study is to demonstrate the non-inferiority of cCeLL compared to frozen section analysis. The investigational device is intended for use with indocyanine green (ICG) for fluorescence imaging as an aid in the visualization of vessels (micro- and macro-vasculature) blood flow in the cerebrovascular before, during or after cranial diagnostic and therapeutic procedures, such as tumor biopsy and resection, which is then read and analyzed by trained-professional for intraoperative diagnosis. The comparison will be held by the device with the conventional intraoperative histological frozen section analysis of identical brain tissue samples in the same patient. Both methods will be compared in terms of their accuracy using the standard of practice, the final pathological diagnosis.

Inclusion Criteria:

• Male or female patients aged 18 years or older
• Patients suspected of having a brain tumor who are scheduled for neurosurgery and are considered candidates for tumor resection
• Patients who understand and have signed the informed consent form

The specimens used in this study must meet all of the following criteria:

• Specimens obtained from patients who have agreed to participate in this clinical trial and who meet the inclusion criteria
• Normal tissue specimens obtained unavoidably during tumor resection surgery in tumor patients

Exclusion Criteria:

• Patients undergoing multiple surgeries
• Patients with bacterial or viral infections
• Patients who develop allergic reactions to the investigational medical device
• Patients with a history of allergy to Indocyanine Green (ICG)
• Patients with iodine hypersensitivity
• Patients taking choleretic agents or rifampicin

Specimens meeting any of the following criteria will be excluded from this clinical trial:

- Specimens with unclear tumor presence or carcinoma diagnosis results based on the reference standard permanent section analysis

Individual Participant Data (IPD) may not be shared due to patient privacy concerns, confidentiality agreements, regulatory restrictions, ethical considerations, and institutional policies. Additionally, data protection laws (e.g., GDPR, HIPAA) and proprietary research interests may limit data availability to ensure compliance and safeguard participant information.

Pathologists will perform diagnoses without access to patient medical records and will not see prior diagnostic results. They will assess tissue samples using only de-identified information, ensuring that fluorescence imaging results do not influence their evaluation. This approach eliminates bias and maintains the integrity of the study's diagnostic comparison.