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Veterinary Radiology & Ultrasound

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https://www.readbyqxmd.com/read/28639730/evaluation-of-thoracic-radiographs-as-a-screening-test-for-dogs-and-cats-admitted-to-a-tertiary-care-veterinary-hospital-for-noncardiopulmonary-disease
#1
Christine L Keyserling, Yekaterina Buriko, Bridget M Lyons, Kenneth J Drobatz, Anthony J Fischetti
Thoracic radiographs are used as a screening tool for dogs and cats with a variety of disorders that have no clinical signs associated with thoracic structures. However, this practice has never been supported by an evidence-based study. The objective of this retrospective observational study was to determine if certain canine and feline populations have a higher proportion of radiographic abnormalities, and whether any of these abnormalities are associated with patient hospitalization and outcome. Patients were excluded if current or previous examinations revealed evidence of primary respiratory or cardiac disease, malignant neoplasia, or an abnormal breathing pattern consistent with pulmonary pathology...
June 22, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28609568/ultrasonography-of-a-ureteral-and-bladder-fungal-granuloma-caused-by-scedosporium-apiospermum-in-a-basset-hound
#2
Jaya Kochenburger, Christian Eriksson, Marc Greenberg, Laura Hoyt
A 5-year-old, spayed female, Basset Hound was referred for evaluation of a urinary bladder mass. Ultrasonographic images revealed a large, inhomogeneous, hypoechoic mass associated with the dorsal wall of the neck of the urinary bladder and left ureter. Partial cystectomy and left ureteral reimplantation were performed. Histopathology showed a severe inflammatory mass lesion forming multiple granulomas. A DNA sequencing test revealed Scedosporium apiospermum as the causative agent. Susceptibility tests on the isolated strain indicated susceptibility to voriconazole...
June 13, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28581642/improving-visual-observation-skills-through-the-arts-to-aid-radiographic-interpretation-in-veterinary-practice-a-pilot-study
#3
Cathy Beck, Heather Gaunt, Neville Chiavaroli
Radiographic interpretation is a perceptual and cognitive skill. Recently core veterinary radiology textbooks have focused on the cognitive (i.e., the clinical aspects of radiographic interpretation) rather than the features of visual observation that improve identification of abnormalities. As a result, the skill of visual observation is underemphasized and thus often underdeveloped by trainees. The study of the arts in medical education has been used to train and improve visual observation and empathy. The use of the arts to improve visual observation skills in Veterinary Science has not been previously described...
June 5, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28547920/pulmonary-pythiosis-in-a-canine-patient
#4
Darin Kepler, Robert Cole, Tekla Lee-Fowler, Jey Koehler, Stephanie Shrader, Joe Newton
A Staffordshire terrier presented for evaluation of a chronic, nonproductive cough that was unresponsive to antibiotic therapy. A large mass identified in the pulmonary hilum was most consistent with tracheobronchial lymphadenopathy on radiographic and computed tomography (CT) images. Bronchoscopy confirmed a mass compressing the dorsal portion of the intrathoracic trachea. Bronchoscopic biopsies of the tracheal mass revealed necrosuppurative and eosinophilic inflammation with intralesional Pythium insidiousum hyphae...
May 25, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28543945/indirect-computed-tomography-lymphangiography-with-aqueous-contrast-for-evaluation-of-sentinel-lymph-nodes-in-dogs-with-tumors-of-the-head
#5
Janet A Grimes, Scott A Secrest, Nicole C Northrup, Corey F Saba, Chad W Schmiedt
Sentinel lymph node evaluation is widely used in human medicine to evaluate the first lymph node(s) to which a tumor drains. Sentinel lymph node biopsy allows avoidance of extensive lymphadenectomies in cases where the sentinel lymph node is negative for metastasis, thereby reducing patient morbidity. It has been shown that regional lymph nodes are not always the sentinel lymph node, thus identification and sampling of sentinel lymph nodes allows for more accurate staging, which is critical for treatment and prognostication in dogs with cancer...
May 21, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28516447/metacarpophalangeal-joint-injury-patterns-on-magnetic-resonance-imaging-a-comparison-in-racing-standardbreds-and-thoroughbreds
#6
Julien Olive, Nicolas Serraud, Thibault Vila, Jean-Philippe Germain
The metacarpal condyle has received extensive attention as a predominant site of overload arthropathy in racehorses. However, detailed descriptions of MRI lesion patterns for the metacarpophalangeal joint and comparisons between types of racing horses are currently lacking. Aims of this retrospective, cross-sectional study were to describe and compare standing low-field magnetic resonance findings in the metacarpophalangeal joints for groups of Standardbreds and Thoroughbreds using systematic semiquantitative scores...
May 17, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28497590/multimodality-characterization-of-a-noncommunicating-congenital-duodenal-duplication-cyst-causing-pyloric-outflow-obstruction-in-a-young-dog
#7
Liliana Mutascio, Federico Vilaplana Grosso, José Ramos-Vara, Micha Simons
A 10-month-old German Shepherd Dog presented for evaluation of intermittent vomiting. Abdominal radiographs revealed a marked right cranial mass effect. Initial differentials included abscess/cyst or less likely neoplasia from undetermined origin. On abdominal ultrasound the mass appeared cystic and thin walled. Computed tomography revealed a large cystic lesion originating from the pyloroduodenal junction causing pyloric outflow obstruction. A noncommunicating duodenal duplication cyst was found on exploratory laparotomy and further confirmed with histopathology and immunohistochemistry...
May 11, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28464566/multidetector-computed-tomographic-pulmonary-angiography-in-a-cat-with-fatal-heartworm-disease
#8
Ioannis Panopoulos, Swan Specchi, Nektarios Soubasis, Anastasia Papastefanou, Georgia Brellou, Edoardo Auriemma
A 17-month-old neutered male domestic shorthair cat was referred for a computed tomographic (CT) study of the thorax due to respiratory distress. Multidetector CT angiography showed a multifocal interstitial ground glass opacity, tortuous and blunted pulmonary arteries consistent with thromboembolism with perivascular lung infiltration and hypoventilation in multiple lung lobes. A blood antigen test was positive for Dirofilaria immitis. The cat's clinical condition rapidly declined and the owners elected euthanasia...
May 2, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28464564/a-comparison-of-two-dose-calculation-algorithms-anisotropic-analytical-algorithm-and-acuros-xb-for-radiation-therapy-planning-of-canine-intranasal-tumors
#9
Koichi Nagata, Timothy D Pethel
Although anisotropic analytical algorithm (AAA) and Acuros XB (AXB) are both radiation dose calculation algorithms that take into account the heterogeneity within the radiation field, Acuros XB is inherently more accurate. The purpose of this retrospective method comparison study was to compare them and evaluate the dose discrepancy within the planning target volume (PTV). Radiation therapy (RT) plans of 11 dogs with intranasal tumors treated by radiation therapy at the University of Georgia were evaluated...
May 2, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28449234/magnetic-resonance-imaging-and-computed-tomographic-characteristics-of-a-glioma-causing-calvarial-erosion-in-a-dog
#10
Alfredo Recio, Cristian de la Fuente, Martí Pumarola, Yvonne Espada, Sònia Añor
An 8-year-old female Boxer was examined for acute onset of seizures. On magnetic resonance imaging (MRI), an intra-axial mass with imaging features consistent with glioma was observed in the right cerebral hemisphere. A defect in the temporal bone adjacent to the mass was observed. Postmortem computed tomography (CT) confirmed temporal bone osteolysis and necropsy demonstrated a glioblastoma with associated calvarial erosion. Although occasionally described in human medicine, to our knowledge, this is the first description of a brain glioma causing calvarial erosion in a dog...
April 27, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28444825/3-tesla-magnetic-resonance-imaging-study-of-the-normal-canine-femoral-and-sciatic-nerves
#11
Christine Sievert, Henning Richter, Dominic Gascho, Patrick R Kircher, Inés Carrera
Understanding the normal course and optimizing visualization of the canine peripheral nerves of the lumbar plexus, in particular the sciatic and the femoral nerves, is essential when interpreting images of patients with suspected peripheral neuropathies such as inflammatory or neoplastic conditions. The purpose of this prospective, anatomic study was to describe the magnetic resonance imaging (MRI) anatomy of the normal canine femoral and sciatic nerves and to define the sequences in which the nerves are best depicted...
April 25, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28436129/use-of-an-electronic-brachytherapy-surface-applicator-to-treat-an-epiglottal-fibrosarcoma-in-a-dog
#12
Charles A Maitz, Katherine L Robinson
Presented is the case of an epiglottal fibrosarcoma in a dog. The location of the mass resulted in challenges in the delivery of adequate dose to the tumor, and herein we describe the treatment using an electronic brachytherapy source. The treatment consisted of four Gy fractions, twice daily for a total of 10 fractions (40 Gy total). Visual reevaluation two weeks after treatment supported adequate spatial dose delivery, and the patient was reportedly improved six weeks after treatment. We demonstrate that plesiotherapy using an electronic brachytherapy device is feasible and may be useful in the treatment of carefully selected veterinary tumors...
April 23, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28436073/academic-and-private-practice-partnerships-in-veterinary-radiology-residency-training
#13
Anthony J Fischetti, Jon T Shiroma, Brian A Poteet
As veterinary radiologists devote greater time to telemedicine consultation, residency training must evolve to reflect the skills of these services. The contribution of private practice/consultant radiologists to residency training has traditionally been minimal but academic and private practice partnerships in education and research can provide the framework for a well-rounded residency. These partnerships can also lessen the impact of workforce shortages in academia and provide financial compensation to academicians through external consultation...
April 23, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28429414/evaluation-of-t2-weighted-versus-short-tau-inversion-recovery-sagittal-sequences-in-the-identification-and-localization-of-canine-intervertebral-disc-extrusion-with-low-field-magnetic-resonance-imaging
#14
Daniel Housley, Abby Caine, Giunio Cherubini, Olivier Taeymans
Sagittal T2-weighted sequences (T2-SAG) are the foundation of spinal protocols when screening for the presence of intervertebral disc extrusion. We often utilize sagittal short-tau inversion recovery sequences (STIR-SAG) as an adjunctive screening series, and experience suggests that this combined approach provides superior detection rates. We hypothesized that STIR-SAG would provide higher sensitivity than T2-SAG in the identification and localization of intervertebral disc extrusion. We further hypothesized that the parallel evaluation of paired T2-SAG and STIR-SAG series would provide a higher sensitivity than could be achieved with either independent sagittal series when viewed in isolation...
April 20, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28429403/accuracy-of-computed-tomographic-arthrography-for-assessment-of-articular-cartilage-defects-in-the-ovine-stifle
#15
Fanny Hontoir, Peter Clegg, Vincent Simon, Nathalie Kirschvink, Jean-Francois Nisolle, Jean-Michel Vandeweerd
Articular cartilage defects are one of the features of osteoarthritis in animals and humans. Early detection of cartilage defects is a challenge in clinical veterinary practice and also in translational research studies. An accurate, diagnostic imaging method would be desirable for detecting and following up lesions in specific anatomical regions of the articular surface. The current prospective experimental study aimed to describe the accuracy of computed tomographic arthrography (CTA) for detecting cartilage defects in a common animal model used for osteoarthritis research, the ovine stifle (knee, femoropatellar/femorotibial) joint...
April 20, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28429379/retrospective-evaluation-of-thoracic-computed-tomography-findings-in-dogs-naturally-infected-by-angiostrongylus-vasorum
#16
Mark E Coia, Gawain Hammond, Daniel Chan, Randi Drees, David Walker, Kevin Murtagh, Janine Stone, Nicholas Bexfield, Lizzie Reeve, Jenny Helm
Angiostrongylus vasorum (A. vasorum) is an important emerging disease of canidae. Cardiorespiratory signs are common in affected dogs, therefore thoracic imaging is critical for diagnosing and monitoring disease. Descriptions of thoracic computed tomography (CT) findings in dogs naturally infected with A. vasorum are currently lacking. Aims of this multicenter, retrospective study were to describe thoracic CT findings in a group of dogs with confirmed disease, determine whether any changes were consistent among dogs, and propose standardized terms for describing thoracic CT findings...
April 20, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28421647/evaluation-of-magnetic-resonance-imaging-for-the-differentiation-of-inflammatory-neoplastic-and-vascular-intradural-spinal-cord-diseases-in-the-dog
#17
Amanda E Masciarelli, John F Griffin, Geoffrey T Fosgate, Silke Hecht, Joseph M Mankin, Shannon P Holmes, Simon R Platt, Marc Kent, Theresa E Pancotto, Annie V Chen, Jonathan M Levine
Magnetic resonance imaging (MRI) is a common test for dogs with suspected intradural spinal cord lesions, however studies on diagnostic performance for this test are lacking. Objectives of this multi-institutional, retrospective, case-control study were to estimate sensitivity and specificity of MRI for (1) distinguishing between histopathologically confirmed intradural spinal cord disease versus degenerative myelopathy in dogs, (2) categorizing intradural spinal cord diseases as neoplastic, inflammatory, or vascular; and (3) determining tumor type within the etiologic category of neoplasia...
April 18, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28419635/canine-histiocytic-sarcoma-presenting-as-a-target-lesion-on-brain-magnetic-resonance-imaging-and-as-a-solitary-pulmonary-mass
#18
Jill Hicks, Renee Barber, Bronwen Childs, Shannon Gm Kirejczyk, Elizabeth W Uhl
A 6-year-old spayed female miniature schnauzer presented with generalized seizures and progressive multifocal intracranial neurologic disease. Thoracic radiographs and computed tomography (CT) revealed a large solitary pulmonary mass within the right cranial lung lobe. On brain magnetic resonance imaging (MRI), a solitary intraparenchymal mass within the left piriform lobe had a "target" appearance on both pre- and postcontrast sequences. Cerebrospinal fluid was unremarkable and histopathology indicated both masses represented histiocytic sarcoma...
April 17, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28402031/evaluation-of-osseous-associated-cervical-spondylomyelopathy-in-dogs-using-kinematic-magnetic-resonance-imaging
#19
Michele Provencher, Amy Habing, Sarah A Moore, Laurie Cook, Gary Phillips, Ronaldo C da Costa
Osseous-associated cervical spondylomyelopathy in dogs is characterized by both static and dynamic spinal cord compression; however, standard MRI methods only assess static compression. In humans with cervical spondylotic myelopathy, kinematic MRI is commonly used to diagnose dynamic spinal cord compressions. The purpose of this prospective, analytical study was to evaluate kinematic MRI as a method for characterizing the dynamic component of osseous-associated cervical spondylomyelopathy in dogs. We hypothesized that kinematic MRI would allow visualization of spinal cord compressions that were not identified with standard imaging...
April 12, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28397316/proposed-expansion-margins-for-planning-organ-at-risk-volume-for-lenses-during-radiation-therapy-of-the-nasal-cavity-in-dogs-and-cats
#20
Zaki Jafry, Arnon Gal, Andre Fleck, Johnson Darko, Valerie J Poirier
Radiation therapy protocols for the feline or canine nasal cavity can damage epithelial cells of the posterior pole of the lens and lead to the development of cataracts. Aims of this retrospective, descriptive study were to calculate movements of the lens during radiation therapy of the nasal cavity in a sample of cats and dogs, and to propose species-specific expansion margins for planning organ at risk volume (PRV) to minimize radiation doses to the lens. All included patients were immobilized with an indexed bite block and positioned in a vacuum positioning cushion for head irradiation...
April 11, 2017: Veterinary Radiology & Ultrasound
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