scholarly journals Computed tomographic localization of the deepest portion of the femoral trochlear groove in healthy dogs

2020 ◽  
Vol 49 (6) ◽  
pp. 1246-1254 ◽  
Author(s):  
Tommaso Nicetto ◽  
Federico Longo ◽  
Barbara Contiero ◽  
Maurizio Isola ◽  
Massimo Petazzoni
Keyword(s):  
Trochlear Groove ◽  
Computed Tomographic ◽  
Healthy Dogs

Use of gadoxetic acid for computed tomographic cholangiography in healthy dogs

2017 ◽  
Vol 78 (7) ◽  
pp. 828-839 ◽  
Author(s):  
Jennifer Chau ◽  
Juan M. Podadera ◽  
Alex C. Young ◽  
Mariano A. Makara
Keyword(s):  
Gadoxetic Acid ◽  
Computed Tomographic ◽  
Healthy Dogs ◽  
Computed Tomographic Cholangiography

scholarly journals Biomechanical analysis of canine medial patellar luxation with femoral varus deformity using a computer model

2020 ◽  
Author(s):  
Jiyun Lee ◽  
Heedong Sim ◽  
Jaemin Jeong ◽  
Sun-Young Kim DVM ◽  
Seokjo Yang ◽  
...  
Keyword(s):  
Finite Element ◽  
Computer Model ◽  
Muscle Activation ◽  
Reaction Force ◽  
Rectus Femoris ◽  
Varus Deformity ◽  
Biomechanical Analysis ◽  
Trochlear Groove ◽  
Tomographic Images ◽  
Computed Tomographic

Abstract Background Femoral varus deformities complicating the realignment of the quadriceps muscles are frequently associated with medial patellar luxation (MPL) in dogs. Therefore, distal femoral osteotomy (DFO) is recommended in dogs affected with severe MPL and a distal femoral varus deformity. The presence of an anatomic lateral distal femoral angle (aLDFA) of ≥ 102° has been anecdotally recommended as an indication for performing corrective DFO in large-breed dogs. However, the effect of a femoral varus deformity on MPL has not been scientifically evaluated. We aimed to evaluate the influence of a femoral varus deformity on MPL using a finite element method based computer model. Three-dimensionally reconstructed computed tomographic images of a normal femur from a Beagle dog were deformed using meshing software to create distal varus deformities. A total of thirteen aLDFAs, including 95°, 98° and 100°–110°, were simulated. The patellar positions and reaction force between the patella and trochlear grooves were calculated for all finite element models under constant rectus femoris muscle activation.Results: The patella was displaced medially from the trochlear groove at an aLDFA of ≥103°. With an aLDFA of 103° to 110°, the reaction force was equal to zero and then decreased to negative values during the simulation, while other models with aLDFAs of 95°, 98°, and 100°-102° had positive reaction force values. The patella began to luxate at 24.90 seconds (sec) with an aLDFA of 103°, 19.80 sec with an aLDFA of 104°, 21.40 sec with an aLDFA of 105°, 20.10 sec with an aLDFA of 106°, 18.60 sec with an aLDFA of 107°, 15.30 sec with an aLDFA of 108°, 16.60 sec with an aLDFA of 109°, and 11.90 sec with an aLDFA of 110°.Conclusion: Severe distal femoral varus with an aLDFA of ≥103° caused MPL when other anatomical factors were controlled. This simplified computer model provides complementary information to anecdotal cutoffs for DFO, hence it should be applied to clinical patients with caution.

scholarly journals Biomechanical analysis of canine medial patellar luxation with femoral varus deformity using a computer model

2020 ◽  
Author(s):  
Jiyun Lee ◽  
Heedong Sim ◽  
Jaemin Jeong ◽  
Sun-Young Kim DVM ◽  
Seokjo Yang ◽  
...  
Keyword(s):  
Finite Element ◽  
Computer Model ◽  
Muscle Activation ◽  
Reaction Force ◽  
Rectus Femoris ◽  
Varus Deformity ◽  
Biomechanical Analysis ◽  
Trochlear Groove ◽  
Tomographic Images ◽  
Computed Tomographic

Abstract BackgroundFemoral varus deformities complicating the realignment of the quadriceps muscles are frequently associated with medial patellar luxation (MPL) in dogs. Therefore, distal femoral osteotomy (DFO) is recommended in dogs affected with severe MPL and a distal femoral varus deformity. The presence of an anatomic lateral distal femoral angle (aLDFA) of ≥ 102° has been anecdotally recommended as an indication for performing corrective DFO in large-breed dogs. However, the effect of a femoral varus deformity on MPL has not been scientifically evaluated. We aimed to evaluate the influence of a femoral varus deformity on MPL using a finite element method based computer model. Three-dimensionally reconstructed computed tomographic images of a normal femur from a Beagle dog were deformed using meshing software to create distal varus deformities. A total of thirteen aLDFAs, including 95°, 98° and 100°–110°, were simulated. The patellar positions and reaction force between the patella and trochlear grooves were calculated for all finite element models under constant rectus femoris muscle activation.Results: The patella was displaced medially from the trochlear groove at an aLDFA of ≥103°. With an aLDFA of 103° to 110°, the reaction force was equal to zero and then decreased to negative values during the simulation, while other models with aLDFAs of 95°, 98°, and 100°-102° had positive reaction force values. The patella began to luxate at 24.90 seconds (sec) with an aLDFA of 103°, 19.80 sec with an aLDFA of 104°, 21.40 sec with an aLDFA of 105°, 20.10 sec with an aLDFA of 106°, 18.60 sec with an aLDFA of 107°, 15.30 sec with an aLDFA of 108°, 16.60 sec with an aLDFA of 109°, and 11.90 sec with an aLDFA of 110°.Conclusion: Severe distal femoral varus with an aLDFA of ≥103° caused MPL when other anatomical factors were controlled. This simplified computer model provides complementary information to anecdotal cutoffs for DFO, hence it should be applied to clinical patients with caution.

Computed tomographic bronchial collapsibility values over 50% may be detected in healthy dogs

2018 ◽  
Vol 60 (1) ◽  
pp. 28-37 ◽  
Author(s):  
Dayoung Oh ◽  
Siheon Lee ◽  
Seungji Kim ◽  
Sangkyung Choen ◽  
Mincheol Choi ◽  
...  
Keyword(s):  
Computed Tomographic ◽  
Healthy Dogs

Effect of slice thickness on computed tomographic perfusion analysis of the pancreas in healthy dogs

2020 ◽  
Vol 81 (9) ◽  
pp. 732-738
Author(s):  
Seungjo Park ◽  
Jin-Woo Jung ◽  
Hyejin Je ◽  
Youjung Jang ◽  
Jihye Choi
Keyword(s):  
Slice Thickness ◽  
Computed Tomographic ◽  
Healthy Dogs
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