scholarly journals Anatomic Study of the Elbow Joint in a Bengal Tiger (Panthera tigris tigris) Using Magnetic Resonance Imaging and Gross Dissections

Animals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1058
Author(s):  
Mario Encinoso ◽  
Jorge Orós ◽  
Gregorio Ramírez ◽  
José Raduan Jaber ◽  
Alejandro Artiles ◽  
...  
Keyword(s):  
Elbow Joint ◽  
Soft Tissues ◽  
Pulse Sequence ◽  
Spin Echo ◽  
Pulse Sequences ◽  
Panthera Tigris ◽  
Mr Images ◽  
Panthera Tigris Tigris ◽  
Bengal Tiger ◽  
Short Tau Inversion Recovery

The objective of our research was to describe the normal appearance of the bony and soft tissue structures of the elbow joint in a cadaver of a male mature Bengal tiger (Panthera tigris tigris) scanned via MRI. Using a 0.2 Tesla magnet, Spin-echo (SE) T1-weighting, and Gradient-echo short tau inversion recovery (GE-STIR), T2-weighting pulse sequences were selected to generate sagittal, transverse, and dorsal planes. In addition, gross dissections of the forelimb and its elbow joint were made. On anatomic dissections, all bony, articular, and muscular structures could be identified. The MRI images allowed us to observe the bony and many soft tissues of the tiger elbow joint. The SE T1-weighted MR images provided good anatomic detail of this joint, whereas the GE-STIR T2-weighted MR pulse sequence was best for synovial cavities. Detailed information is provided that may be used as initial anatomic reference for interpretation of MR images of the Bengal tiger (Panthera tigris tigris) elbow joint and in the diagnosis of disorders of this region.

Adjustable shunt valve–induced magnetic resonance imaging artifact: a comparative study

2010 ◽  
Vol 113 (1) ◽  
pp. 74-78 ◽  
Author(s):  
Ahmed K. Toma ◽  
Andrew Tarnaris ◽  
Joan P. Grieve ◽  
Laurence D. Watkins ◽  
Neil D. Kitchen
Keyword(s):  
Mr Imaging ◽  
Pulse Sequence ◽  
Spin Echo ◽  
Pulse Sequences ◽  
Fast Spin Echo ◽  
Mr Images ◽  
Shunt Valve ◽  
Adjustable Valve ◽  
Imaging Artifact

Object In this paper, the authors' goal was to compare the artifact induced by implanted (in vivo) adjustable shunt valves in spin echo, diffusion weighted (DW), and gradient echo MR imaging pulse sequences. Methods The MR images obtained in 8 patients with proGAV and 6 patients with Strata II adjustable shunt valves were assessed for artifact areas in different planes as well as the total volume for different pulse sequences. Results Artifacts induced by the Strata II valve were significantly larger than those induced by proGAV valve in spin echo MR imaging pulse sequence (29,761 vs 2450 mm3 on T2-weighted fast spin echo, p = 0.003) and DW images (100,138 vs 38,955 mm3, p = 0.025). Artifacts were more marked on DW MR images than on spin echo pulse sequencse for both valve types. Conclusions Adjustable valve–induced artifacts can conceal brain pathology on MR images. This should influence the choice of valve implantation site and the type of valve used. The effect of artifacts on DW images should be highlighted pending the development of less MR imaging artifact–inducing adjustable shunt valves.

Synovial osteochondromatosis in the elbow joint of a Bengal tiger (Panthera tigris tigris)

2001 ◽  
Vol 14 (01) ◽  
pp. 56-59 ◽  
Author(s):  
M. C. Williams ◽  
N. E. Lambrechts
Keyword(s):  
Synovial Membrane ◽  
Elbow Joint ◽  
Joint Fluid ◽  
Panthera Tigris ◽  
Synovial Osteochondromatosis ◽  
Fluid Analysis ◽  
History Of ◽  
Panthera Tigris Tigris ◽  
Bengal Tiger ◽  
The Right

SummaryA 10-year-old Bengal tiger with a history of chronic thoracic limb lameness was presented for clinical evaluation. Radiographs of the elbows revealed extensive osteophyte formation in both joints and three ovoid mineralised densities in the right joint. Joint fluid analysis was consistent with a degenerative joint process. The joints were partially explored arthroscopically. A medial arthrotomy of the right joint allowed collection of synovial membrane samples which, when examined histopathologically, revealed the presence of cartilaginous nodules with central endochondral ossification within the synovial membrane. A diagnosis of synovial osteochondromatosis was made. This case is compared to other cases described in veterinary and human medical literature.Clinical, radiological, and histopathological description of synovial osteochondromatosis in the elbow joint of a Bengal tiger.

scholarly journals Quantitative Radiomics: Impact of Pulse Sequence Parameter Selection on MRI-Based Textural Features of the Brain

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
John Ford ◽  
Nesrin Dogan ◽  
Lori Young ◽  
Fei Yang
Keyword(s):  
Pulse Sequence ◽  
Spin Echo ◽  
Pulse Sequences ◽  
Parameter Selection ◽  
Inversion Recovery ◽  
Textural Features ◽  
Imaging Data ◽  
Gradient Echo ◽  
The Impact ◽  
The Brain

Objectives. Radiomic features extracted from diverse MRI modalities have been investigated regarding their predictive and/or prognostic value in a variety of cancers. With the aid of a 3D realistic digital MRI phantom of the brain, the aim of this study was to examine the impact of pulse sequence parameter selection on MRI-based textural parameters of the brain. Methods. MR images of the employed digital phantom were realized with SimuBloch, a simulation package made for fast generation of image sequences based on the Bloch equations. Pulse sequences being investigated consisted of spin echo (SE), gradient echo (GRE), spoiled gradient echo (SP-GRE), inversion recovery spin echo (IR-SE), and inversion recovery gradient echo (IR-GRE). Twenty-nine radiomic textural features related, respectively, to gray-level intensity histograms (GLIH), cooccurrence matrices (GLCOM), zone size matrices (GLZSM), and neighborhood difference matrices (GLNDM) were evaluated for the obtained MR realizations, and differences were identified. Results. It was found that radiomic features vary considerably among images generated by the five different T1-weighted pulse sequences, and the deviations from those measured on the T1 map vary among features, from a few percent to over 100%. Radiomic features extracted from T1-weighted spin-echo images with TR varying from 360 ms to 620 ms and TE = 3.4 ms showed coefficients of variation (CV) up to 45%, while up to 70%, for T2-weighted spin-echo images with TE varying over the range 60–120 ms and TR = 6400 ms. Conclusion. Variability of radiologic textural appearance on MR realizations with respect to the choice of pulse sequence and imaging parameters is feature-dependent and can be substantial. It calls for caution in employing MRI-derived radiomic features especially when pooling imaging data from multiple institutions with intention of correlating with clinical endpoints.

ABDOMINAL PYTHIOSIS IN A BENGAL TIGER (PANTHERA TIGRIS TIGRIS)

2006 ◽  
Vol 37 (2) ◽  
pp. 186-189 ◽  
Author(s):  
Claus Buergelt ◽  
Joshua Powe ◽  
Tamara White
Keyword(s):  
Panthera Tigris ◽  
Panthera Tigris Tigris ◽  
Bengal Tiger

scholarly journals Utilisation of honey trap method to ensnare a dispersing sub-adult Bengal Tiger Panthera tigris tigris L. in a human dominated landscape

2021 ◽  
Vol 13 (8) ◽  
pp. 19153-19155
Author(s):  
Gobind Sagar Bhardwaj ◽  
Balaji Kari ◽  
Arvind Mathur
Keyword(s):  
Forest Management ◽  
Endangered Species ◽  
Adult Male ◽  
Panthera Tigris ◽  
Tracking Data ◽  
Northern Area ◽  
Dense Vegetation ◽  
Tiger Reserve ◽  
Panthera Tigris Tigris ◽  
Bengal Tiger

The need to conserve the tiger, an endangered species and avoid interactions with humans is among the main objectives of forest management of tiger reserves in India. The objective of the study is show that male tigers can be trapped by pheromones in urine and feces of tigress for subsequent translocation. A sub-adult male tiger strayed out of Sariska Tiger Reserve into the human dominated areas to look for territory. Attempts to tranquilize the tiger failed due to dense vegetation. Then the urine and feces of a captive tigress was used to trail the tiger, capture him, and release him into his natal area thereby avoiding incidents with humans. Tracking data indicated that the tiger had settled in the northern area part of Sariska and subsequently sired seven cubs with two tigresses. 

scholarly journals First record of Bengal Tiger, Panthera tigris tigris Linnaeus, 1758 (Felidae), in eastern Nepal

Check List ◽  
2021 ◽  
Vol 17 (5) ◽  
pp. 1249-1253
Author(s):  
Damber Bista ◽  
Sonam Tashi Lama ◽  
Janam Shrestha ◽  
Yam Bahadur Rumba ◽  
Janno Weerman ◽  
...  
Keyword(s):  
First Record ◽  
Panthera Tigris ◽  
Transboundary Conservation ◽  
Photographic Evidence ◽  
Panthera Tigris Tigris ◽  
Bengal Tiger ◽  
Trail Cameras

We report the first record of a Bengal Tiger, Panthera tigris tigris, in eastern Nepal in 2020 based on photographic evidence. We documented this evidence at 3,165 m a.s.l., which makes it the highest elevation record of a tiger in Nepal. We recorded this evidence in one of 46 trail cameras deployed for monitoring Red Pandas in the Panchthar-Ilam-Taplejung (PIT) area. The PIT area, which has non-protected status, borders India in the east. Our finding supports the importance of transboundary conservation, which will benefit local and flagship wildlife in the PIT area.

Sign in / Sign up

Export Citation Format

Share Document