Safety and Practicality of Magnetic Resonance Imaging (MRI) for Non-invasive Assessment of Coronary Stents

1998 ◽  
Vol 31 (2) ◽  
pp. 382A
Author(s):  
S Rosario
2005 ◽  
Vol 2 (2) ◽  
pp. 133-140 ◽  
Author(s):  
D. Mietchen ◽  
H. Keupp ◽  
B. Manz ◽  
F. Volke

Abstract. For more than a decade, Magnetic Resonance Imaging (MRI) has been routinely employed in clinical diagnostics because it allows non-invasive studies of anatomical structures and physiological processes in vivo and to differentiate between healthy and pathological states, particularly of soft tissue. Here, we demonstrate that MRI can likewise be applied to fossilized biological samples and help in elucidating paleopathological and paleoecological questions: Five anomalous guards of Jurassic and Cretaceous belemnites are presented along with putative paleopathological diagnoses directly derived from 3D MR images with microscopic resolution. Syn vivo deformities of both the mineralized internal rostrum and the surrounding former soft tissue can be traced back in part to traumatic events of predator-prey-interactions, and partly to parasitism. Besides, evidence is presented that the frequently observed anomalous apical collar might be indicative of an inflammatory disease. These findings highlight the potential of Magnetic Resonance techniques for further paleontological applications.


Plant Methods ◽  
2017 ◽  
Vol 13 (1) ◽  
Author(s):  
Daniel Pflugfelder ◽  
Ralf Metzner ◽  
Dagmar van Dusschoten ◽  
Rüdiger Reichel ◽  
Siegfried Jahnke ◽  
...  

1984 ◽  
Vol 25 (6) ◽  
pp. 449-456 ◽  
Author(s):  
H. G. Ringertz ◽  
R. C. Brasch ◽  
A. Brody ◽  
R. Ehman ◽  
C. A. Gooding

Ten children aged 1 week to 13 years with 12 vascular abnormalities were examined with magnetic resonance imaging (MRI) and other imaging modalities. MRI was the only single non-invasive modality that demonstrated all lesions and their internal structures. The vascular nature of 3 hemangiomas could not be established with MRI alone. No marked differences in MRI appearance was seen in 5 cases with vascular tumors compared with 5 cases with other vascular abnormalities. The status of the blood in the vascular lesions as flowing fast, slow, or not at all was successfully assessed in 9 of the 12 lesions.


1996 ◽  
Vol 21 (3) ◽  
pp. 311-314 ◽  
Author(s):  
M. Gabl ◽  
M. Lener ◽  
S. Pechlaner ◽  
W. Judmaier

A prospective study of 32 patients was carried out to investigate the significance of dynamic magnetic resonance imaging (MRI) in diagnosis of triangular fibrocartilage (TFC) lesions. Tears of the TFC can be diagnosed well by means of static MRI and arthroscopy. Dynamic MRI examination has an advantage in evaluating the stability of the TFC and ulnocarpal impingement. By means of dynamic MRI it was possible to make a preoperative diagnosis of an ulnocarpal impingement in five patients, a diagnosis which was confirmed through arthroscopy in all cases. In three further patients, dynamic MRI showed ulnocarpal impingement caused by instability of the ulnar attachment of the TFC. This kind of impingement could not be ascertained arthroscopically. Dynamic MRI extends the possibilities of evaluating obscure ulnar wrist pain. Its significance lies in the non-invasive examination of ulnocarpal impingement as well as the evaluation of TFC stability.


Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4096 ◽  
Author(s):  
Connor M. Ellis ◽  
Juan Pellico ◽  
Jason J. Davis

The use of nanoparticulate systems as contrast agents for magnetic resonance imaging (MRI) is well-established and known to facilitate an enhanced image sensitivity within scans of a particular pathological region of interest. Such a capability can enable both a non-invasive diagnosis and the monitoring of disease progression/response to treatment. In this review, magnetic nanoparticles that exhibit a bio-responsive MR relaxivity are discussed, with pH-, enzyme-, biomolecular-, and protein-responsive systems considered. The ability of a contrast agent to respond to a biological stimulus provides not only enriched diagnostic capabilities over corresponding non-responsive analogues, but also an improved longitudinal monitoring of specific physiological conditions.


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