Hans Degryse

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Gadolinium 1,4,7,10-tetraazacyclododecane-N,N',N",N"'-tetraacetic acid (Gd-DOTA) is the first of a new class of macrocyclic paramagnetic magnetic resonance (MR) contrast agents (gadolinium cryptelates) to be used in clinical practice. Gadolinium-DOTA possesses relaxation properties similar to those of gadolinium diethylene triamine pentaacetic acid(More)
Three cases of calcific tendinitis occurring at an unusual site (vastus lateralis tendon) are described. Findings on conventional radiography and computed tomography together with the clinical history are characteristic for this disorder and reflect its natural evolution. The actual role of magnetic resonance imaging seems limited to excluding neoplasm and(More)
We report five cases of cocaine smuggling, by hiding multiple drug-filled foreign bodies in the colon, either after oral ingestion or by placing them in the colon per rectum. Several smuggling methods in the gastrointestinal (GI) tract and their radiological findings on abdominal plain film are presented. Computed tomography (CT) is found to be a more(More)
A retrospective analysis of the results of ultrasound (US), computed tomography (CT), and magnetic resonance imaging (MRI) of 24 cases (28 lesions) of proven focal nodular hyperplasia (FNH) is presented. While US exhibited nonspecific features, CT frequently showed characteristic features: hypodensity on precontrast scans (69%), transient immediate(More)
The main difference between macrocyclic Gd-DOTA and linear Gd-DTPA complexes is the greater stability of the former which theoretically might reduce biological interactions in man. To evaluate the clinical relevance of this property, 300 unselected neurological patients were included in a randomised double-blind comparison involving five European centres,(More)
Tumors of nerves are classified into benign (schwannoma and neurofibroma) and malignant nerve sheath tumors. Schwannomas almost always occur as solitary lesions, whereas neurofibromas may occur alone or in a greater number, especially in patients with the peripheral form of von Recklinghausen's disease. Benign nerve sheath tumors often present as(More)
Changes in European …nancial regulation (the Markets in Financial Instruments Directive) in November 2007 allow new trading venues to emerge and compete with traditional stock exchanges (regulated markets). As a result, currently, many stocks are traded on a multitude of trading platforms, i.e. the market has become fragmented. This paper evaluates the(More)
This paper examines the relation between cash flow, corporate governance and fixed-investment spending. In perfect capital markets we expect no systematic relationship. However, Myers and Majluf's (1984) asymmetric information hypothesis and Jensen's (1986) managerial discretion hypothesis present imperfections and predict a positive impact of cash flow on(More)
We analyse the effects of investment decisions and firms' internal organisation on the efficiency and stability of horizontal mergers. In our framework synergies are endogenous and there might be internal conflict within merged firms. We show that often stable mergers do not lead to more efficiency and may even lead to efficiency losses. These mergers lead(More)