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In this paper a new model is presented for the evaluation of variety-induced costs in product-service systems. The model consists of a descriptive model visualizing variety within the integrated product-service system and an explanatory model quantifying the cost of a given PSS configuration. The descriptive model uses the concept of a hierarchical feature tree, which visualizes the multitude of possible...
Objective A new technology is introduced that enables real-time 4D (three spatial dimensions plus time) X-ray guidance for vascular catheter interventions with acceptable levels of ionising radiation. Methods The enabling technology is a combination of low-dose tomographic data acquisition with novel compressed sensing reconstruction and use of prior image information. It was implemented in a prototype...
4D (=3D+time) interventional image guidance requires tomographic data acquisition during the whole intervention. However, the method, which is also called tomographic fluoroscopy or CT fluoroscopy, will be routinely accepted if the patient dose level can be kept as low as in 2D+time fluoroscopic guidance, which is the standard image guidance technique in today's interventions. To achieve this goal...
Mouse models of cardiac diseases have proven to be a valuable tool in preclinical research. The rapid heart and respiratory rates of free breathing mice and the consequent technical challenges up to now prohibit in vivo perfusion studies, e.g. of the myocardium, even if gating methods are applied. This makes a sacrification of the animals unavoidable and only allows for the application of static ex...
Gating is necessary in cardio-thoracic small-animal imaging because of the physiological motions that are present during scanning. In small-animal computed tomography (CT), gating is mainly performed on a projection base because full scans take much longer than the motion cycle. This paper presents and discusses various gating concepts of small-animal CT, and provides examples of concrete implementation...
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