Digital Subtraction Angiography
Vascular anatomy without the bone and soft tissue in the way.
Included with every SoftDicom device.
What is Digital Subtraction Angiography?
Digital Subtraction Angiography removes the pre-contrast mask frame from the contrast run, leaving the vessel tree on a clean background. SoftDicom performs subtraction on the device with pixel-shift correction for patient motion, and plays the subtracted run as cine at the frame rate you choose.
Mask-frame subtraction
Select the mask frame automatically or by hand, then subtract it across the contrast run to isolate the vasculature.
Pixel-shift correction
Re-register the mask against the live frame to suppress the motion artefact that patient movement leaves behind.
Cine playback
Step frame by frame or play the run at an adjustable rate to follow contrast through the vessel tree.
Built for the cath lab
Works alongside the existing cath lab and angiography workflow, at the bedside, with no network dependency.
Specifications
See the full technical specifications for the complete device and software spec.
Questions
What is Digital Subtraction Angiography?
Digital Subtraction Angiography removes the pre-contrast mask frame from the contrast run, so the bone and soft tissue drop out and the vessel tree is left on a clean background.
Does SoftDicom perform the subtraction on the device?
Yes. Mask-frame subtraction runs on the device across the contrast run, with the mask frame selected either automatically or by hand.
How does SoftDicom handle patient movement during a run?
Pixel-shift correction re-registers the mask against the live frame, which suppresses the motion artefact that patient movement leaves behind.
Which modalities does the DSA viewer support?
XA (X-Ray Angiography) and RF (Radiofluoroscopy) studies.
Can a subtracted run be played back as cine?
Yes. The subtracted run plays as cine at an adjustable frame rate, steps frame by frame, and takes its own window and level independently of the unsubtracted series.