MedGemma 1.5 4B is an updated version of the MedGemma 1 4B model.

MedGemma 1.5 4B expands support for several new medical imaging and data processing applications, including:

• High-dimensional medical imaging: Interpretation of three-dimensional volume representations of Computed Tomography (CT) and Magnetic Resonance Imaging (MRI).
• Whole-slide histopathology imaging (WSI): Simultaneous interpretation of multiple patches from a whole slide histopathology image as input.
• Longitudinal medical imaging: Interpretation of chest X-rays in the context of prior images (e.g., comparing current versus historical scans).
• Anatomical localization: Bounding box–based localization of anatomical features and findings in chest X-rays.
• Medical document understanding: Extraction of structured data, such as values and units, from unstructured medical lab reports.
• Electronic Health Record (EHR) understanding: Interpretation of text-based EHR data.

In addition to these new features, MedGemma 1.5 4B delivers improved accuracy on medical text reasoning and modest improvement on standard 2D image interpretation compared to MedGemma 1 4B.

Reference

Model card