Vascular four-dimensional reconstruction method in NOT gate-controlled ICUS (intravascular ultrasound) image sequence
An image sequence, non-gated technology, applied in the field of medical imaging
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[0076] The processing step of the present invention is described in detail below in conjunction with accompanying drawing:
[0077] (1) Image acquisition:
[0078] ICUS and CAG imaging are performed at the same time. The ICUS image sequence is acquired with an intravascular ultrasound imager and a non-cardiac gating method with continuous withdrawal of the ultrasound catheter, which can shorten the time for interventional examinations. Use a C-arm X-ray angiography machine to acquire a pair of approximately orthogonal CAG image sequences, requiring the angle between the two contrast angles to be between 60° and 120°, and record the imaging system parameters (contrast angle, X-ray source) distance to the imaging plane).
[0079] (2) Four-dimensional reconstruction of the retraction path of the ultrasound catheter:
[0080] The 4D reconstruction steps of the ultrasound catheter withdrawal path include:
[0081] (1) Image preprocessing:
[0082] Necessary preprocessing is...
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