The Chinese University of Hong Kong

Defeng Wang

Lin Shi

Hui Lin

Pheng Ann Heng

Ka Long Ko

Disclosed is a method and an apparatus for quantifying vascular fluid motions from digital subtraction angiography (DSA) images, comprising: calculating an optical flow field between two temporal consecutive DSA images; and estimating a displacement of blood or tissue between the two temporal consecutive DSA images from the calculated optical flow field, wherein the optical flow field is calculated by solving a minimization problem of a CLG energy function, wherein the CLG energy function combines the temporally extended variant of Horn-Schunck approach with Lucas-Kanade approach non-linearly in spatiotemporal approach. The present disclosure provides a new optical flow solution significantly reducing the computation cost with a high robustness for quantifying vascular fluid motions from DSA.

Methods and apparatuses for quantifying vascular fluid motions from DSA

A computer-implemented method for modeling an orthopedic cast, including scanning an injured limb to extract raw body data; determining, from the extracted raw body data, a target portion data of the injured limb, the determined data representing a fine cast surface for the orthopedic cast; patterning the fine cast surface to form a ventilation structure and a blank area thereon; forming an opening gap on the blank area for assembling and disassembling the orthopedic cast; and offsetting the cast surface in parallel to thicken the orthopedic cast.

Modeling method for orthopedic casts

Disclosed are methods, systems and apparatuses for detection of arterial input function (AIF) in MRI, specially DCE MR images, comprising automatic selection of AIF based on affinity propagation (AP) clustering method.

Systems and methods for detecting arterial input function (AIF)

Disclosed are methods and apparatus for analyzing medical image change, particularly bone changes, either bone gain or loss. Disclosed also are methods and apparatus for bone registration of computed tomography (CT) images. These new methods and apparatus significantly improve the efficiency of current matching procedure.

Growing community of inventors

Hong Kong, China

Defeng Wang