Search Results
Selvanayagam, J. B., Kardos, A., Francis, J. M., et al.: Value of delayed-enhancement cardiovascular magnetic resonance imaging in predicting myocardial viability after surgical revascularization. Circulation, 2004, 110 , 1535
. Drangova 2006 Delayed enhancement magnetic resonance imaging predicts response to cardiac resynchronization therapy in patients with intraventricular dyssynchrony J Am Coll Cardiol
A dynamic magnetic resonance imaging (MRI) method was developed for in vivo examination of the pig heart. Measurements were carried out on 15 meat-type pigs of different liveweight using a 1.5 T equipment. Inhalation anaesthesia was applied, then data acquisition was synchronised by ECG gating. Depending on the heart rate and heart size, in each case 8 to 10 slices and in each slice 8 to 14 phases were acquired prospectively according to one heart cycle. During the post-processing of the images the left and the right ventricular volumes were determined. The values measured at 106 kg liveweight are 2.5 times higher than those obtained at 22 kg, while the ejection fractions are equal. The calculated cardiac output values were 3.5 l (22 kg, 132 beats/min.), and 6.0 l (106 kg, 91 beats/min.), respectively. After measuring the wall thickness, the contraction values were also determined for the septum (70%), and for the anterior (61%), posterior (41%) and lateral (54%) walls of the left ventricle. Three-dimensional animated models of the ventricles were constructed. Based on the investigations performed, the preconditioning, the anaesthetic procedure, the specific details of ECG measurement and the correct MR imaging technique were worked out.
The combination of advanced neuro-navigation, 3D multi-modality image fusion and intra-operative MRI can fulfill the promise of an integrated image guidance system for neurosurgery. The concept of MRI-guided neurosurgery is now widely accepted and preliminary evidence suggests that MRI guidance greatly improves the safety and effectiveness of neurosurgical procedures. The application of intra-operative MRI is especially helpful in the surgical excision of low grade gliomas (tumor resection control). Among the currently developed thermal therapy methods, focused ultrasound (FUS) appears to be the most promising method for non-invasive neurosurgery.
Computed tomography (CT) and virtual reality (VR) made it possible to create internal views of the human body without actual penetration. During the last two decades, several endoscopic diagnosis procedures have received virtual counter candidates. This paper presents an own concept of a virtual reality guided diagnostic tool, based on magnetic resonance images representing parallel cross-sections of the investigated organ. A series of image processing methods are proposed for image quality enhancement, accurate segmentation in two dimensions, and three-dimensional reconstruction of detected surfaces. These techniques provide improved accuracy in image segmentation, and thus they represent excellent support for three dimensional imaging. The implemented software system allows interactive navigation within the investigated volume, and provides several facilities to quantify important physical properties including distances, areas, and volumes.
Bevezetés: A myeloma multiplex a csontvelő plazmasejtjeinek gyógyíthatatlan malignus betegsége. A diagnózis felállításában, a betegség stádiumának, kiterjedésének, a kezelés eredményességének megítélésében az újabb funkcionális képalkotó módszereknek meghatározó a szerepe. Célkitűzés: A szerzők 2 és fél év alatt a myeloma multiplex felismerésében és a kezelés eredményességének nyomon követésében diffúziós mágneses rezonanciavizsgálattal szerzett tapasztalataikat ismertetik. Módszer: A hagyományos T1-súlyozott és T2 zsirelnyomással súlyozott szekvenciákat diffúziós mérésekkel kiegészítve 27 myeloma multiplexre gyanús beteg teljes test mágneses rezonanciavizsgálatát végezték a koponyaalaptól a symphysisig. A látszólagos diffúziós együttható mérése 3 betegnél történt. A megbetegedés definitív diagnózisát csontvelő-biopszia bizonyította. Eredmények: 13 betegnél a mágneses rezonanciavizsgálat igazolta a diagnózist, akik közül 6 esetben a diffúziós mérések a hagyományos szekvenciákhoz képest többletinformációt nyújtottak. Egy betegnél a biopszia igazolta a myeloma multiplex diagnózisát, a vizsgálat fém okozta műtermékek miatt nem volt jól megítélhető. Következtetések: A diffúziós méréssel kiegészített mágneses rezonanciavizsgálat hasznos funkcionális képalkotó eljárás a myeloma multiplex korai felismerésében. Orv. Hetil., 2014, 155(31), 1241–1245.
% of breast malignancies are adenocarcinomas. Invasive ductal carcinoma (IDC) is the main category of invasive breast carcinoma. IDC is responsible for 55% of breast carcinoma occurrence after detection [ 3 ]. Breast Magnetic Resonance
Endo-anal ultrasound versus endo-anal magnetic resonance imaging for the depiction of external anal sphincter pathology in patients with faecal incontinence: a systematic review
Az endoanalis ultrahang- és az endoanalis MR-vizsgálat szisztematikus összehasonlítása a külső analis sphincter defektusainak megítélésére faecalis incontinentiában szenvedő betegeknél
Young WA Kimot 1996 High resolution magnetic resonance imaging on the anal sphincter using a dedicated endoanal coil: comparison of magnetic resonance imaging with
extracardiac findings in cardiovascular magnetic resonance imaging . J Thorac Imaging 2019 ; 34 : 48 – 55 . 10.1097/RTI.0000000000000360 [19] Bogaert J , Taylor AM : Cardiac anatomy . In: Clinical cardiac MRI (eds: Bogaert J , Dymarkowski S
Korosoglou, G., Elhmidi, Y., Steen, H. és mtsai: Prognostic value of high-dose dobutamine stress magnetic resonance imaging in 1,493 consecutive patients: assessment of myocardial wall motion and perfusion. J. Am. Coll. Cardiol., 2010, 56 , 1225
