Independent Assessment of Duct-Focused Digital Subtraction Pancreatography for Pancreatic Duct Visualization: A Retrospective Pilot Study

Why It Matters

DSP provides a radiation‑neutral method to enhance pancreatic duct imaging, which could improve diagnostic confidence when background interference limits conventional visualization and may shape future endoscopic imaging standards.

Key Takeaways

• DSP achieved 100% technical success with single acquisition per case
• MPD visualization rated acceptable in up to 100% of cases
• Radiation dose comparable to conventional pancreatography (31 vs 48 mGy)
• Interobserver agreement highest for MPD (91%) and lowest for branch ducts (64%)

Pulse Analysis

Digital subtraction pancreatography (DSP) emerged as a response to a long‑standing challenge in endoscopic imaging: the difficulty of visualizing the pancreatic duct amid dense surrounding tissue. Traditional pancreatography often suffers from background interference, which can obscure subtle ductal abnormalities and prolong procedures. By subtracting pre‑contrast images from contrast‑enhanced frames, DSP aims to isolate the ductal lumen, offering clearer delineation without additional contrast load. This technical premise aligns with broader trends toward image‑processing solutions that enhance diagnostic yield while preserving patient safety.

The pilot study, conducted at a single center between September 2022 and October 2025, compared 11 DSP cases with 10 conventional procedures. All DSP attempts succeeded on the first try, requiring only a single acquisition per case—a notable efficiency gain. Independent reviewers rated main pancreatic duct (MPD) visualization as acceptable in 91% and 100% of cases, respectively, while background suppression achieved similar scores. Radiation exposure remained comparable, with a median dose of 31 mGy for DSP versus 48 mGy for the conventional group, and no procedure‑related adverse events were reported. Interobserver agreement was strongest for MPD visualization (91%) but more modest for branch ducts (64%), highlighting areas where image interpretation still varies.

While the study did not prove a decisive advantage over standard pancreatography, its findings suggest DSP could serve as a valuable adjunct in complex cases where conventional imaging falls short. The technique’s ability to maintain radiation levels while improving duct clarity may attract endoscopy units seeking to optimize workflow and diagnostic accuracy. Future larger‑scale trials will be essential to define specific clinical indications, cost‑effectiveness, and integration pathways, potentially positioning DSP as a niche but impactful tool in the gastroenterology imaging arsenal.