Segmentation, Unsupervised clustering, Mean shift, Cardiac images, Human heart, Left ventricle. In this paper an image segmentation scheme that is based on combinations of a nonparametric technique and a seed based clustering algorithm is reported. The method has been applied to clinical unsubtracted angiograms of the human heart. The first step of the method consists in applying a mean shiftba...

T he Palmaz-Schatz stent has been used successfully to improve primary angioplasty results, to treat large coronary dissections, or to prevent impending closure of the lumen.-1-5 The determination of successful stent implantation is based on the angiographic appearance. However, angiographic projection imaging may not reveal the three-dimensional geometry that is necessary to appreciate full ex...

L esions located at coronary artery bifurcations represent one of the challenging areas in interventional cardiology. The use of coronary stents has resulted in a higher angiographic success rate compared to balloon angioplasty. Angiographic restenosis rates nevertheless remain high for the various techniques that employ bare metal stents. Although the advent of drug-eluting stents (DES) holds ...

Abitract: Retrieval of a Thrombus Attached to a Cournand Needle • Upon completion of a carotid angiogram, a clot of platelets, leukocytes, erythrocytes and fibrin was found attached to a No. 18 gauge Cournand needle. The chance retrieval of this thrombus establishes the occurrence of thrombus formation on angiographic needles. Such thrombi could be the source of some post-angiographic infarctio...

Fenestration of the cervical segment of the internal carotid artery (ICA) is considered an extremely rare anatomic variant, with, to the best of our knowledge, only four cases reported in the literature. We report six angiographic observations of apparent fenestration of the cervical ICA, which we believe are secondary to arterial dissection. We discuss the angiographic appearance of these pseu...

We compare four optical coherence tomography techniques for noninvasive visualization of microcapillary network in the human retina and murine cortex. We perform phantom studies to investigate contrast-to-noise ratio for angiographic images obtained with each of the algorithm. We show that the computationally simplest absolute intensity difference angiographic OCT algorithm that bases only on t...

A permanently mounted angiography suite in an operating room (OR) is considered to be a hybrid OR. However, regular use for angiographic interventions is restricted with this setup. We introduce an alternative use of space for the efficient utilisation of an angiographic suite outside the surgical unit. This concept includes three scenarios that describe a modification of the catheter suite acc...