Publications by authors named "Mazen Alhrishy"
Article Synopsis
- Catheters and guidewires play a critical role in various cardiac procedures, and their accurate detection in X-ray images is essential for effective treatment and imaging techniques.
- A multiscale vessel enhancement filter and adaptive binarization were used to extract and reconstruct the centerlines of these wire-like structures, with additional methods to classify electrode catheters and distinguish guidewires from other artifacts.
- The proposed framework demonstrated high accuracy, with minimal detection errors and success rates exceeding 80% across multiple catheter types and guided vehicles in a substantial clinical image dataset.
Article Synopsis
- A novel passive tracking technique called partial saturation (pSAT) is introduced to improve the visualization of gadolinium-filled balloon catheters during cardiovascular magnetic resonance imaging (CMR) for patients with congenital heart disease (CHD).
- The pSAT method was tested in healthy subjects and two patients, showing superior contrast and signal-to-noise ratios compared to conventional imaging techniques.
- Results indicated that using a pSAT angle between 20° to 40° allowed for effective simultaneous imaging of the catheter and surrounding cardiovascular anatomy, making it suitable for CMR-guided procedures in over 93% of cases.
Interventional fluoroscopy provides guidance in a variety of minimally invasive procedures. However, three-dimensional (3D) clinically relevant information is projected onto a two-dimensional (2D) image which can make image interpretation difficult. Moreover, vasculature visualisation requires the use of iodinated contrast media which is nephrotoxic and is the primary cause of renal complications.
View Article and Find Full Text PDFInterventional digital tomosynthesis from a standard fluoroscopy system using 2D-3D registration.
Med Image Comput Comput Assist Interv
February 2014
Fluoroscopy is the mainstay of interventional radiology. However, the images are 2D and visualisation of vasculature requires nephrotoxic contrast. Cone-beam computed tomography is often available, but involves large radiation dose and interruption to clinical workflow.
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