Curvilinear structure enhancement with the polygonal path image--application to guide-wire segmentation in X-ray fluoroscopy.

Curvilinear structures are common in medical imaging, which typically require dedicated processing techniques. We present a new structure to process these, that we call the polygonal path image, denoted (see text for symbol). We derive from (see text for symbol) some curvilinear structure enhancement and analysis algorithms.

A comprehensive study of stent visualization enhancement in X-ray images by image processing means.

In this work we propose a comprehensive study of Digital Stent Enhancement (DSE), from the analysis of the requirements to the validation of the proposed solution. First, we derive the stent visualization requirements in the context of the clinical application and workflow. Then, we propose a DSE algorithm combining automatic detection, tracking, registration and contrast enhancement.

[A new technique of pulmonary arterial angioscopy: capnoangioscopy. An experimental study].

From animal experiments (n = 10), the authors describe a new technique of pulmonary arterial angioscopy. A balloon-fitted catheter is introduced into the trunk of one of the pulmonary arteries. A small caliber angioscope with an end capable of being propped up is then pushed within the lumen of the catheter.

[A classical but unknown cause of peritoneal effusion disclosed by echography. Typhoid fever].

Two cases of peritoneal effusion discovered by sonography in patients with typhoid fever are reported. These peritoneal effusions have no pejorative value; only clinical findings can differentiate these simple effusions from a perforative thyphoid peritonitis, which is exceptional nowadays. Typhoid fever, among other febrile diseases should be considered when ultrasounds shows an isolated peritoneal effusion.

A study of coronary artery bypass graft patency using MR imaging.

This is a prospective study comparing selective angiography and magnetic resonance (MR) imaging in the evaluation of the patency of coronary artery bypass grafts (CABGs). Twenty-eight patients with 52 grafts were studied (10 internal mammary artery grafts, 19 saphenous vein grafts including 2 sequential grafts, and 15 right coronary artery saphenous vein grafts). The mean interval between MR imaging and the surgical procedure was 13.