Search results for "nuclear medicine"

Perkutane Entfernung eines intraperitonealen Fremdkörpers

1993

Darstellung der Zentralregion mit anisotroper echoplanarer Diffusionswichtung (EPI-DWI)

2003

Im Rahmen dieser Studie sollte untersucht werden, ob sich eine diffusionsgewichtete Sequenz eignet, unter Ausnutzung der anisotropen Diffusionsverhaltnisse entlang der Markfasern die Zentralregion (ZR) bei Probanden und Patienten verlasslich darzustellen. Funf Patienten mit Hirntumoren und 20 gesunde Probanden wurden an einem klinischen 1,5-TMR-Tomographen untersucht. Bei den Probanden dienten die „klassischen“ anatomischen Zeichen zur Lokalisation der Zentralregion an einem 3-D-T1-Datensatz als Goldstandard zur Lokalisation, bei den Patienten zusatzlich noch ein funktionelles Magnet-resonanztomogramm (fMRT) mit einem Finger-Tapping-Paradigma im Blockdesign und der intraoperative Befund. Be…

MR-Angiographie peripherer Gefäße mit automatischer Verschiebetisch-Technik bei 1.0 T im Vergleich zur i. a. DSA

1999

PURPOSE Contrast-enhanced (CE) 3D-MR angiography of peripheral arteries was performed in 8 patients with peripheral arterial occlusive disease by applying a new tracking technique on a 1.0 T system (Magnetom Harmony, Siemens). The studies were compared with intra-arterial digital angiography as gold standard. MATERIALS AND METHODS Imaging of the distal aorta, pelvis, upper and lower limb arteries was accomplished with a Flash-3D-sequence (TR/TE = 6.2/3.2 ms) within 26 s acquisition time of each region after a single bolus of 30 ml contrast agent. Individual circulation time was determined by a test bolus before each examination. RESULTS 112 vessel segments were evaluated. MR angiography ach…

Prognostic factors in the treatment of Ewing's sarcoma

1987

From 1981 up to February 1985, a total of 93 protocol patients entered the study CESS 81. The protocol recommended an initial 18-week period of polychemotherapy (VACA) followed by local therapy and two additional cycles of chemotherapy. Local therapy consisted either of radical surgery or of incomplete resection plus postoperative irradiation with 36 Gy or of radiotherapy alone (46 and 60 Gy). Centrally located lesions were always irradiated with 60 Gy. This article summarizes the data after 5 years. Data of 93 patients were analysed in October 1986 after a median follow-up of 37 months. The projected 5-year survival is 50%. The relapse rate was 42%, distant relapses occurred in 19%, local …

Case report 28

1977

Sonographie von Urachusanomalien im Kindesalter

1991

The sonographic appearances of urachal anomalies are illustrated by six patients with persistent urachus (n = 1), infected persistent urachus (n = 1), urachal sinus (n = 1), infected urachal cyst (n = 2) and urachal diverticulum (n = 1). The anomalies were diagnosed sonographically in every case. Symptomatic patients were treated surgically.

Les cancers du rein non à cellules claires : caractéristiques clinico-biologiques et prise en charge thérapeutique hors chirurgie

2020

Resume Les cancers du rein non a cellules claires representent pres de 25 % de l’ensemble des cancers du rein, et constituent un groupe de tumeurs tres heterogenes a la fois en termes de varietes histologiques, mais egalement d’anomalies biologiques oncogeniques. La presentation clinique ainsi que le pronostic des patients sont egalement tres variables. Compte tenu de la rarete de chaque entite tumorale, il n’existe que tres peu d’essais cliniques ayant porte sur une variete bien definie de cancer non a cellules claires. Ceci rend difficile l’interpretation de ces etudes, et donc l’emission de recommandations claires de prise en charge medicale pour la maladie avancee. Dans cet article, les…

Imaging funzionale per diffusione (DWI) e ischemia cerebrale in fase acuta: Potenzialità diagnostiche e confronto con metodiche convenzionali

1997

Stroke is the third leading cause of death and is a major cause of long-term disability. Neuroprotective treatment within a 4-hour «therapeutic window» has proved highly efficacious in reducing morbility and mortality in animal model. It is with this background that the need for emergent diagnosis and therapy of acute stroke in strongly suggested. Computed tomography (CT) shows the parenchymal changes of acute stroke too late to be helpful, and its role has been primarily to evaluate the possibility of intracerebral or subarachnoid hemorrhage. While conventional magnetic resonance (MR) imaging can demonstrate parenchymal abnormalities 4–6 hours after ischemia, newer techniques such as diff…

Experimental investigations about the stability of the spongiosa of the femoral head, a new angle plate in mind

1990

Im Hinblick auf den Trochanter-major-Abbruch bei und nach Winkelplattenosteosynthesen von pertrochanteren Frakturen wurde zu Versuchszwecken eine 130o-Winkelplatte mit lediglich 6 mm breitem Klingenprofil angefertigt, bei der das notwendige Knochenfenster die laterale Femurkortikalis weniger schwacht. Die Fragestellung war, ob diese Plattenklinge hinsichtlich der Tragfahigkeit des Osteosynthesesystems vergleichbar stabil in der Spongiosa des Huftkopfes verankert werden kann wie die herkommliche 130o-Winkelplatte. Dazu wurden an Knochenpraparaten vergleichende Druckbelastbarkeitsversuche, von pertrochanteren Osteotomien durchgefuhrt. Die Ergebnisse zeigen, das die neuartige Klinge mit dem sc…

Parametric assessment of myocardial perfusion by densitometric evaluation of digital subtraction coronary angiograms: a comparison with tomographic T…

2002

Densitometric results about local myocardial perfusion are compared with those derived from a quantitative analysis of TL-201 single photon emission computer tomograms (TL-201 SPECT). Ten patients underwent conventional TL-201 SPECT at rest and after maximum bicycle stress and dipyridamole infusion the day prior to the investigation. SPECT was applied to provide improved spatial resolution for the detection of perfusion abnormalities. During the catheterization procedure four digital subtraction coronary angiograms were performed, two of the left and two of the right coronary artery both before and after pharmacologically induced hyperemia by intracoronary papaverine. The densitometric para…