Simeon Petkov

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X-ray angiography is widely used in cardiac disease diagnosis during or prior to intravascular interventions. The diaphragm motion and the heart beating induce gray-level changes, which are one of the main obstacles in quantitative analysis of myocardial perfusion. In this paper we focus on detecting the diaphragm border in both single images or whole X-ray(More)
X-ray angiography is the most common imaging modality employed in the diagnosis of coronary diseases prior or during a catheter-based intervention. The analysis of the patient X-Ray sequence can provide useful information about the degree of arterial stenosis, the myocardial perfusion and other clinical parameters. If the sequence has been acquired to(More)
The interhemispheric subdural hematoma is a rare condition. We present a case of interhemispheric subdural hematoma in a patient aged 65 years. A day prior to admission he was struck with a water-pipe on the head. He went to sleep the same evening complaining of a slight headache. At about two o'clock in the morning the headache increased in intensity. By(More)
The authors describe a new method of retrograde selective ventriculography by means of which the necessity for making an opening in the skull and for a trans-cerebral ventricular puncture is avoided. Trough a sub-occipital puncture and cannula a radio-opaque catheter is guided under radiological control into the ventricular system.
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