PURPOSE This study was carried out to assess the radiation dose to patients undergoing interventional radiology procedures at Ramathibodi Hospital, Bangkok, Thailand. METHODS Data were collected from 60 patients under transarterial oily-chemoembolisation (TOCE) and femoral angiography performed with the Toshiba Infinix model VC-i FPD single plane system. Data were also collected from 60 patie...

For the assessment of cerebrovascular diseases, it is beneficial to obtain three-dimensional (3D) morphologic and hemodynamic information about the vessel system. Rotational angiography is routinely used to image the 3D vascular geometry and we have shown previously that rotational subtraction angiography has the potential to also give quantitative information about blood flow. Flow information...

Pre-procedure X-ray computed tomography (CT) and magnetic resonance imaging (MRI) angiography are commonly used to delineate the complex and variable relationship of the left atrium, pulmonary veins, and surrounding structures. 3D CT and MR angiography are routinely incorporated into electroanatomic mapping systems to guide ablation lesion placement in the context of patient specific anatomy. P...

The assessment of coronary arteries is an essential step when diagnosing coronary heart diseases. There exists a wide range of specialized algorithms for the segmentation of the coronary arteries in Computed Tomography Angiography datasets. In general, these algorithms have to be initialized by manually placing a seed point at the origins of the coronary arteries or within the ascending aorta. ...

T he recognition, quantification, and follow-up of valvular regurgitation is a long-standing clinical problem. While many ways to evaluate the severity of valvular insufficiency have been tried, none allows precise quantification of regurgitant volume, much less of the severity of the lesion's effect on the cardiovascular system and the patient.' Invasive angiography is the traditional and most...

A 33-year-old woman with a history of psoriasis presented with asymmetric oligoarthritis. She had no cardiovascular symptoms. Naproxen and steroids were started with the diagnosis of psoriatic arthritis. Routine chest X-ray showed a small left hemithorax with a right-sided aortic arch and decreased left-sided pulmonary vasculature. A CTscan (Picture A) demonstrated the absence of the left pulmo...

Coronary angiography is an invasive diagnostic procedure in which radiocontrast is injected into the coronary arteries under X-ray guidance in order to display the coronary anatomy and possible luminal obstruction. Despite the advances in other diagnostic methods, it remains to be "the golden standard" of coronary disease diagnostics. Although today the complication rate is far lower than previ...

INTRODUCTION Coronary Angiography is the standard technique for imaging the left ventricle and coronary arteries. Within the spectrum of diagnostic imaging coronary Angiography is a high dose procedure. The number of examination has significantly increased in recent years, partly due to the introduction of diagnostic X-ray equipment with improved imaging capabilities. This has resulted not only...

A case of an asymptomatic 32-year-old male with a complex congenital pulmonary vein varix is reported herein. Chest X-ray incidentally revealed a tubular opacity passing from the periphery of the left lingula to the mediastinum. ECG gated multidetector computed tomography showed the opacity to be a vessel emptying into the left atrium via the left superior pulmonary vein. In addition, a second ...

Introduction Image quality of MR angiography (MRA) has been substantially improved with fast three-dimensional (3D) MRA acquired during the first passage of a bolus injection of the contrast medium. For clinical evaluation of vascular disorders such as atherosclerotic obstruction (ASO) and aortic aneurysm, a long anatomic region including abdomen and lower extremities has to be imaged, Contrast...