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Three-Dimensional Pathology Specimen Modeling Using "Structure-From-Motion" Photogrammetry: A Powerful New Tool for
John Turchini, Michael E Buckland, Anthony J Gill
1From the Cancer Diagnosis and Pathology Group, Kolling Institute of Medical Research, Royal North Shore Hospital, Sydney, Australia (Drs Turchini, Gill, and Battye); the Northern Clinical School, University of Sydney, Sydney, Australia (Drs Turchini, Buckland, and Gill); the Department of Anatomical Pathology, Royal North Shore Hospital, St Leonards, Australia (Drs Turchini and Gill); the Department of Neuropathology, Royal Prince Alfred Hospital, and the Brain and Mind Centre, University of Sydney, Camperdown, Australia (Dr Buckland); and the Department of Anatomical Pathology, Dorevitch Pathology, Heidelberg, Australia (Dr Battye).
Context.—:
Three-dimensional (3D) photogrammetry is a method of image-based modeling in which data points in digital images, taken from offset viewpoints, are analyzed to generate a 3D model. This modeling technique has been widely used in the context of geomorphology and artificial imagery, but has yet to be used within the realm of anatomic pathology.
Objective.—:
To describe the application of a 3D photogrammetry system capable of producing high-quality 3D digital models and its uses in routine surgical pathology practice as well as medical education.
Design.—:
We modeled specimens received in the 2 participating laboratories. The capture and photogrammetry process was automated using user control software, a digital single-lens reflex camera, and digital turntable, to generate a 3D model with the output in a PDF file.
Results.—:
The entity demonstrated in each specimen was well demarcated and easily identified. Adjacent normal tissue could also be easily distinguished. Colors were preserved. The concave shapes of any cystic structures or normal convex rounded structures were discernable. Surgically important regions were identifiable.
Conclusions.—:
Macroscopic 3D modeling of specimens can be achieved through Structure-From-Motion photogrammetry technology and can be applied quickly and easily in routine laboratory practice. There are numerous advantages to the use of 3D photogrammetry in pathology, including improved clinicopathologic correlation for the surgeon and enhanced medical education, revolutionizing the digital pathology museum with virtual reality environments and 3D-printing specimen models.
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