caa a22 4500 386348510 CHVBK 20180307111820.0 cr unu---uuuuu 161130e198905 xx s 000 0 eng 10.1017/S0022215100156622 doi S0022215100156622 pii (NATIONALLICENCE)cambridge-10.1017/S0022215100156622 Lloyd G. A. S. Semon Lecture, University of London, delivered 3 November 1988 at the Royal Society of Medicine. Diagnostic imaging of the nose and paranasal sinuses [Elektronische Daten] [G. A. S. Lloyd] There are four principal modalities now used by the Radiologist to investigate the nose and paranasal sinuses. These are: plain X-ray, conventional tomography, computerised tomography (CT), and magnetic resonance (MR). Plain X-ray is the initial examination, and is used as a screening procedure before employing one of the tomographic techniques. Conventional pluridirectional tomography has now been superseded by CT scannning, which has the advantage of providing both good bone detail and soft tissue imaging. Since the introduction of magnetic resonance (MR), this technique has replaced CT as the optimum method of showing the extent of soft tissue tumour in the sinuses. The introduction of the paramagnetic contrast agent Gadolinium (Gd DTPA) has improved its accuracy. In the anterior fossa discrimination between cerebral oedema and tumour invasion is better shown, and in the sinuses tumour is more easily identified from retained secretion and inflamed mucosa. The best method currently available to show pathology in the nose and sinuses is a combination of GdMR and CT: the former to identify the soft tissues and the latter to show bone changes. Copyright © JLO (1984) Limited 1989 The Journal of Laryngology & Otology Cambridge University Press 103/5(1989-05), 453-460 0022-2151 103:5<453 1989 103 JLO https://doi.org/10.1017/S0022215100156622 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022215100156622 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Lloyd G. A. S. Semon Lecture, University of London, delivered 3 November 1988 at the Royal Society of Medicine NATIONALLICENCE 773 0- The Journal of Laryngology & Otology Cambridge University Press 103/5(1989-05), 453-460 0022-2151 103:5<453 1989 103 JLO CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence SWISSBIB 280281994 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge