scholarly journals Diagnosis of suspected hypovitaminosis A using magnetic resonance imaging in African lions (Panthera leo)

2005 ◽  
Vol 76 (3) ◽  
Author(s):  
M.P. Hartley ◽  
R.M. Kirberger ◽  
M. Haagenson ◽  
L. Sweers
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Vitamin A ◽  
Vitamin A Deficiency ◽  
Clinical Signs ◽  
Maximum Diameter ◽  
Resonance Imaging ◽  
Non Invasive ◽  
Brain Measurements ◽  
Hypovitaminosis A

Vitamin A deficiency is described in captive lions. Ante mortem diagnosis can either be made by serum analysis or liver biopsy, both of which may be problematic. This study utilised magnetic resonance imaging to identify vitamin A deficiency in lions with relatively mild clinical signs, which could otherwise be attributed to numerous other neurological conditions. Magnetic resonance imaging is a non-invasive, reliable diagnostic tool to demonstrate pathology typically associated with this condition. To accommodate varying lion ages and sizes, a number of cranium and brain measurements were compared with that of the maximum diameter of the occular vitreous humor. Occular ratios of the tentorium cerebelli osseum and occipital bone were most reliable in diagnosing the thickened osseous structures characteristic of hypovitaminosis A. The ratio of maximum : minimum dorsoventral diameter of the C1 spinal cord was also of value.

scholarly journals Non-invasive diagnostics in fossils - Magnetic Resonance Imaging of pathological belemnites

2005 ◽  
Vol 2 (2) ◽  
pp. 133-140 ◽  
Author(s):  
D. Mietchen ◽  
H. Keupp ◽  
B. Manz ◽  
F. Volke
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Soft Tissue ◽  
Clinical Diagnostics ◽  
Resonance Imaging ◽  
Non Invasive ◽  
Physiological Processes ◽  
Magnetic Resonance Imaging Mri ◽  
Invasive Diagnostics

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.

scholarly journals Changes of Dorsal Root Ganglion Volume in Dogs with Clinical Signs of Degenerative Myelopathy Detected by Water-Excitation Magnetic Resonance Imaging

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1702
Author(s):  
Eiji Naito ◽  
Kohei Nakata ◽  
Yukiko Nakano ◽  
Yuta Nozue ◽  
Shintaro Kimura ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spinal Cord ◽  
Magnetic Resonance ◽  
Clinical Signs ◽  
Intervertebral Disc Herniation ◽  
Resonance Imaging ◽  
Diagnostic Potential ◽  
Water Excitation ◽  
Spinal Cord Segment ◽  
Degenerative Myelopathy

Canine degenerative myelopathy (DM) is a progressive and fatal neurodegenerative disease. However, a definitive diagnosis of DM can only be achieved by postmortem histopathological examination of the spinal cord. The purpose of this study was to investigate whether the volumetry of DRG using the ability of water-excitation magnetic resonance imaging (MRI) to visualize the DRG in dogs has premortem diagnostic value for DM. Eight dogs with DM, twenty-four dogs with intervertebral disc herniation (IVDH), and eight control dogs were scanned using a 3.0-tesla MRI system, and water-excitation images were obtained to visualize and measure the volume of DRG, normalized by body surface area. The normalized mean DRG volume between each spinal cord segment and mean volume of all DRG between T8 and L2 in the DM group was significantly lower than that in the control and the IVDH groups (P = 0.011, P = 0.002, respectively). There were no correlations within the normalized mean DRG volume between DM stage 1 and stage 4 (rs = 0.312, P = 0.128, respectively). In conclusion, DRG volumetry by the water-excitation MRI provides a non-invasive and quantitative assessment of neurodegeneration in DRG and may have diagnostic potential for DM.

scholarly journals Early Increases in Breast Tumor Xenograft Water Mobility in Response to Paclitaxel Therapy Detected by Non-Invasive Diffusion Magnetic Resonance Imaging

Neoplasia ◽  
1999 ◽  
Vol 1 (2) ◽  
pp. 113-117 ◽  
Author(s):  
Jean-Philippe Galons ◽  
Maria I. Altbach ◽  
Gillian D. Paine-Murrieta ◽  
Charles W. Taylor ◽  
Robert J. Gillies
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Breast Tumor ◽  
Diffusion Magnetic Resonance Imaging ◽  
Tumor Xenograft ◽  
Water Mobility ◽  
Resonance Imaging ◽  
Non Invasive

scholarly journals Anterior cruciate ligament ganglion: case report

2002 ◽  
Vol 120 (6) ◽  
pp. 195-197 ◽  
Author(s):  
André Pedrinelli ◽  
Fábio Bonini Castellana ◽  
Ricardo Bragança de Vasconcellos Fontes ◽  
Rafael Ferreira Coelho ◽  
Luiz Álvaro de Menezes F°.
Keyword(s):  
Magnetic Resonance Imaging ◽  
Anterior Cruciate Ligament ◽  
Case Report ◽  
Magnetic Resonance ◽  
Cruciate Ligament ◽  
Clinical Signs ◽  
Left Knee ◽  
Pathological Examination ◽  
Resonance Imaging ◽  
Anterior Cruciate

CONTEXT: A ganglion is a cystic formation close to joints or tendinous sheaths, frequently found in the wrist, foot or knee. Intra-articular ganglia of the knee are rare, and most of them are located in the anterior cruciate ligament. The clinical picture for these ganglia comprises pain and movement restrictions in the knee, causing significant impairment to the patient. Symptoms are non-specific, and anterior cruciate ligament ganglia are usually diagnosed through magnetic resonance imaging or arthroscopy. Not all ganglia diagnosed through magnetic resonance imaging need to undergo surgical treatment: only those that cause clinical signs and symptoms do. Surgical results are considered good or excellent in the vast majority of cases. CASE REPORT: A 29-year-old male presented with pain in the left knee during a marathon race. Physical examination revealed limitation in the maximum range of knee extension and pain in the posterior aspect of the left knee. Radiographs of the left knee were normal, but magnetic resonance imaging revealed a multi-lobed cystic structure adjacent to the anterior cruciate ligament, which resembled a ganglion cyst. The mass was removed through arthroscopy, and pathological examination revealed a synovial cyst. Patient recovery was excellent, and he resumed his usual training routine five months later.

scholarly journals Magnetic resonance imaging for the non-invasive diagnosis in patients with ovarian cancer

Medicine ◽  
2020 ◽  
Vol 99 (50) ◽  
pp. e23551
Author(s):  
Yongxue Su ◽  
Lingli Deng ◽  
Lijun Yang ◽  
Xianhong Yuan ◽  
Wei Xia ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Ovarian Cancer ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Non Invasive

A non-invasive biomarker of hepatic inflammation based on magnetic resonance imaging

2018 ◽  
Vol 68 ◽  
pp. S565
Author(s):  
M. House ◽  
L.L. Lai ◽  
W.-K. Chan ◽  
N.R.N. Mustapha ◽  
A. Vijayananthan ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Hepatic Inflammation ◽  
Resonance Imaging ◽  
Non Invasive

Non-invasive perinatal necropsy by magnetic resonance imaging

The Lancet ◽  
1996 ◽  
Vol 348 (9035) ◽  
pp. 1139-1141 ◽  
Author(s):  
Jocelyn AS Brookes ◽  
Margaret A Hall-Craggs ◽  
Virginia R Sams ◽  
William R Lees
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Non Invasive

Visualization of USPIO-Labeled Melt-Electrowritten Scaffolds by Non-Invasive Magnetic Resonance Imaging

2021 ◽  
Author(s):  
Kilian Maria Arthur Mueller ◽  
Geoffrey Topping ◽  
Sebastian Patrick Schwaminger ◽  
Younzhe Zou ◽  
Diana Marcela Rojas-González ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Tissue Engineering ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Digital Fabrication ◽  
Resonance Imaging ◽  
Non Invasive ◽  
Forming Technology

Melt electrowriting (MEW) is a high-resolution fiber-forming technology for the digital fabrication of complex micro-structured scaffolds for tissue engineering, which has convincingly shown its potential in in vitro and in...

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