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Veterinary Radiology & Ultrasound

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https://www.readbyqxmd.com/read/29786925/computed-tomographic-and-radiographic-bronchial-collapse-may-be-a-normal-characteristic-of-forced-expiration-in-dogs
#1
Hyunryung Kim, Young Joo Kim, Hanbin Lee, Taegeon An, Jin Yu, Hyounglok Yoon, Gayeon An, Jaihyun Jung, Jinhwa Chang, Dongwoo Chang
Tracheobronchomalacia has been diagnosed using radiography or bronchoscopy to confirm bronchial changes in luminal diameter during the respiratory cycle. However, studies in healthy humans suggest that some degree of bronchial collapse may be observed during the normal respiratory cycle. In this analytical study, the luminal diameter of the bronchus to each of the six pulmonary lobes and the mean percentage of expiratory collapse from end inspiratory, end expiratory, and two forced expiratory phases (10 and 15 ml/kg) were determined via computed tomography (CT) and radiography in 22 healthy Beagle dogs...
May 22, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29776006/mineralization-can-be-an-incidental-ultrasonographic-finding-in-equine-tendons-and-ligaments
#2
Etienne J O O'Brien, Roger K W Smith
Tendon/ligament mineralization is recognized in horses but information regarding its clinical significance is limited. The aims of this observational study were to report the structures most commonly affected by ultrasonographically detectable mineralization and, for these, determine frequency of diagnosis and key clinical features. Cases presented at our hospital in April 1999-April 2013 and September 2014-November 2015 were included: a total of 27 horses (22 retrospective, five prospective). Mineralizations were most common in deep digital flexor tendons (10) and suspensory ligament branches (eight), representing 10% and 7% (estimated), respectively, of horses diagnosed with injuries to these structures during the study...
May 18, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29750846/evaluation-of-the-diagnostic-accuracy-of-skeletal-scintigraphy-for-the-causes-of-front-foot-pain-determined-by-magnetic-resonance-imaging
#3
Laura E Quiney, Joanne L Ireland, Sue J Dyson
There is good correlation between increased radiopharmaceutical uptake anywhere in the feet of sports or leisure horses and the presence of foot pain. However, low sensitivity of scintigraphy for identifying lesions contributing to foot pain as determined by magnetic resonance imaging (MRI) has been reported. The aim of this retrospective, cross-sectional, analytical study was to assess the accuracy of scintigraphy for identifying the cause(s) of foot pain, using MRI as the reference standard. Sports and leisure horses that underwent both skeletal scintigraphy and MRI of the front feet between March 2008 and December 2014 and for which a definitive diagnosis of the cause(s) of front foot pain was reached were included (121 feet of 70 horses)...
May 11, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29750845/ultrasonographic-variations-are-present-in-the-distal-sesamoidean-impar-ligament-of-clinically-sound-horses
#4
Jessica Lauren MacDonald, Ruth-Anne Richter, Christine L Wimer
Ultrasonography is an established diagnostic test for evaluating horses with foot pain due to suspected podotrochlear apparatus pathology. However, variations from the previously reported normal appearance of the distal sesamoidean impar ligament have not always coincided with lameness. The objective of this prospective, cross-sectional, descriptive study was to characterize variations in the ultrasonographic appearance of the distal sesamoidean impar ligament in sound horses using the transcuneal approach...
May 11, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29746706/dr-warren-sherman-sherm-mathey
#5
Kelly Mann, Gary Stamp, Walt Burghardt
No abstract text is available yet for this article.
May 10, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29742312/semi-quantitative-methods-yield-greater-inter-and-intraobserver-agreement-than-subjective-methods-for-interpreting-99m-technetium-hydroxymethylene-diphosphonate-uptake-in-equine-thoracic-processi-spinosi
#6
Claudia van Zadelhoff, Anna Ehrle, Roswitha Merle, Werner Jahn, Christoph Lischer
Scintigraphy is a standard diagnostic method for evaluating horses with back pain due to suspected thoracic processus spinosus pathology. Lesion detection is based on subjective or semi-quantitative assessments of increased uptake. This retrospective, analytical study is aimed to compare semi-quantitative and subjective methods in the evaluation of scintigraphic images of the processi spinosi in the equine thoracic spine. Scintigraphic images of 20 Warmblood horses, presented for assessment of orthopedic conditions between 2014 and 2016, were included in the study...
May 9, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29738101/evaluation-of-the-diagnostic-accuracy-of-skeletal-scintigraphy-in-lame-and-poorly-performing-sports-horses
#7
Laura E Quiney, Joanne L Ireland, Sue J Dyson
Skeletal scintigraphy is an established imaging modality, however, its validity as a diagnostic test in lame or poorly performing sports horses has not been determined. The objective of this retrospective cross-sectional analytical study was to determine the accuracy of skeletal scintigraphy as an indiscriminate screening test in sports horses. All sports horses that underwent scintigraphic examination between March 2008 and December 2014 for which a definitive diagnosis was reached were included. Examinations were evaluated blindly...
May 8, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29733474/computed-tomographic-description-of-the-highly-variable-imaging-features-of-equine-oromaxillary-sinus-and-oronasal-fistulae
#8
Laura Hargreaves, Jonathon J Dixon
Oronasal and oromaxillary sinus fistulae are well-documented complications following removal or loss of a maxillary cheek tooth. Diagnosis is currently based on a combination of oral examination, videoendoscopy, radiography, and computed tomography (CT). The objective of this retrospective, case series study was to describe the CT characteristics of confirmed oronasal and oromaxillary sinus fistulae in a group of horses. Inclusion criteria were a head CT acquired at the authors' hospital during the period of 2012-2017, a CT diagnosis of oronasal or oromaxillary sinus fistulae, and a confirmed diagnosis based on a method other than CT...
May 7, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29729053/computed-tomography-is-a-feasible-method-for-quantifying-bone-density-in-macaca-mulatta
#9
Salvador A Solís-Chávez, Manuel A Castillo-Rivera, Marcela Arteaga-Silva, Alejandra Ibáñez-Contreras, Braulio Hernández-Godínez, Andrés Morón-Mendoza, Gamaliel Mendoza-Cuevas, Axayácatl Morales-Guadarrama, Emilio Sacristan-Rock
Osteopathologies are a result of advanced age and decreased bone density and represent a global health problem. It is therefore important to generate models for longitudinal studies of the pathophysiology in order to improve early diagnosis and develop preventive therapies. For this kind of research, the use of computed tomography (CT) to evaluate bone health offers advantages over other techniques since it provides more complete information. The aim of this prospective, pilot study was to obtain measurements of the left femur from a population in captivity of 32 rhesus monkeys (Macaca mulatta) in order to standardize the model for future research...
May 4, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29726055/dogs-with-acute-myeloid-leukemia-or-lymphoid-neoplasms-large-cell-lymphoma-or-acute-lymphoblastic-leukemia-may-have-indistinguishable-mediastinal-masses-on-radiographs
#10
Erin Epperly, Kelly R Hume, Steven Moirano, Tracy Stokol, Joanne Intile, Hollis N Erb, Peter V Scrivani
Acute myeloid leukemia is an uncommon hematopoietic neoplasm of dogs that should be differentiated from lymphoid neoplasms, such as lymphoma, because of different treatment protocols and a worse prognosis. Thoracic radiography is performed frequently in dogs with suspected hematopoietic neoplasia, and detecting a mediastinal mass often prioritizes lymphoma as the most likely diagnosis. However, we have observed a mediastinal mass in several dogs with acute myeloid leukemia and hypothesized that (1) the frequency of a mediastinal mass was higher and (2) the size of the mass was larger in dogs with acute myeloid leukemia compared to dogs with lymphoid neoplasms...
May 3, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29707844/additional-palmaroproximal-palmarodistal-oblique-radiographic-projections-improve-accuracy-of-detection-and-characterization-of-equine-flexor-cortical-lysis
#11
Sherry A Johnson, Myra F Barrett, David D Frisbie
Radiographic flexor cortical lysis indicates advanced degenerative change and its earlier recognition may improve case outcome. Aims of this prospective, diagnostic accuracy study were to determine effects of radiographic beam angle and observer on accuracy of lesion detection. The sample included 36 limbs from 31 horses. Palmaroproximal-palmarodistal oblique (skyline) radiographs were acquired at standard (n = 38) and more shallow (alternate) angles (n = 58). Images were independently reviewed by four experience levels of five observers each (n = 20) for the presence and severity of flexor cortical lysis...
April 29, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29687517/hounsfield-units-are-a-useful-predictor-of-pleural-effusion-cytological-type-in-dogs-but-not-in-cats
#12
Sarah J Woods, Mathieu Spriet, Noa Safra, Derek D Cissell, Dori L Borjesson
All categories of pleural effusion subjectively display as soft tissue opacity on computed tomography (CT). Quantitative measurement using Hounsfield units (HU) has the potential to bring additional information regarding the nature of the fluid in a noninvasive way. The purposes of this retrospective cross-sectional analytical study were to compare Hounsfield units of different pleural effusion categories in dogs and cats, assess association between specific cytologic parameters and Hounsfield units, and evaluate the effect of dependent vs...
April 23, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29667282/cardiac-gated-phase-contrast-magnetic-resonance-angiography-is-a-reliable-and-reproducible-technique-for-quantifying-blood-flow-in-canine-major-cranial-abdominal-vessels
#13
Francesca Del Chicca, Andrea Schwarz, Paula Grest, Florian Willmitzer, Matthias Dennler, Patrick R Kircher
Blood flow changes in cranial abdominal vessels are important contributing factors for canine hepatic disease. This prospective, experimental, pilot study aimed to evaluate cardiac-gated, phase contrast magnetic resonance angiography (PCMRA) as a method for characterizing blood flow in canine major cranial abdominal vessels. Eleven, healthy, adult beagle dogs were sampled. Cardiac-gated, phase contrast magnetic resonance angiography of the cranial abdomen was performed in each dog and blood flow was independently measured in each of the major cranial abdominal vessels by three observers, with two observers recording blood flow values once and one observer recording blood flow values three times...
April 17, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29663604/primary-extracranial-nasopharyngeal-meningioma-in-a-dog
#14
Emilie Fauchon, Jean-Charles Husson, Juan Hernandez, Eymeric Gomes
An 8-year-old Labrador Retriever was presented for inspiratory efforts with stertor. A rhinoscopy and a magnetic resonance imaging scan were performed and revealed a naso-pharyngeal mass. The mass was identified in the nasopharynx without meningeal extension. This mass was both T1- and T2-hyperintense, compared to normal brain parenchyma without significant postcontrast enhancement. The mass was surgically removed and the histologic diagnosis was a mesenchymal tumor. Immunohistochemistry with antibodies was conducted and consistent with an extracranial meningioma...
April 16, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29663557/dr-e-a-al-corley-1931-2017
#15
Jerry M Owens
No abstract text is available yet for this article.
April 16, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29659090/detection-of-intra-cardiac-thrombi-and-congestive-heart-failure-in-cats-using-computed-tomographic-angiography
#16
Kyle P Vititoe, Ryan C Fries, Stephen Joslyn, Laura E Selmic, Mark Howes, Jordan P Vitt, Robert T O'Brien
Arterial thromboembolism is a life-threatening condition in cats most commonly secondary to cardiac disease. Echocardiography is the reference standard to evaluate for presence of a thrombus. In humans, computed tomographic (CT) angiography is becoming widely used to detect left atrial thrombi precluding the use of sedation. The purpose of this prospective, controlled, methods comparison pilot study was threefold: (1) describe new CT angiography protocol used in awake cats with cardiac disease and congestive heart failure; (2) determine accuracy of continuous and dynamic acquisition CT angiography to identify and characterize cardiac thrombi from spontaneous echocardiographic contrast using transthoracic echocardiography as our reference standard; (3) identify known negative prognostic factors and comorbidities of the thorax that CT angiography may provide that complement or supersede echocardiographic examination...
April 16, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29570234/pilot-study-utilizing-fluorine-18-fluorodeoxyglucose-positron-emission-tomography-computed-tomography-for-glycolytic-phenotyping-of-canine-mast-cell-tumors
#17
Lynn R Griffin, Doug H Thamm, Laura E Selmic, E J Ehrhart, Elissa Randall
The goal of this prospective pilot study was to use naturally occurring canine mast cell tumors of various grades and stages as a model for attempting to determine how glucose uptake and markers of biologic behavior are correlated. It was hypothesized that enhanced glucose uptake, as measured by 2-[fluorine-18]fluoro-d-glucose-positron emission tomography/computed tomography (F18 FDG PET-CT), would correlate with histologic grade. Dogs were recruited for this study from a population referred for treatment of cytologically or histologically confirmed mast cell tumors...
March 23, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29544023/radiographic-and-computed-tomographic-appearance-of-caseous-lymphadenitis-in-a-goat
#18
Federico Vilaplana Grosso, Stacy Tinkler, Mario Sola, Margaret Miller, Hock Gan Heng
A 2-year-old Boer doe was presented with respiratory distress and severe inspiratory dyspnea. Cervical and thoracic radiographs revealed a marked retropharyngeal soft tissue mass effect, several mineralized pharyngeal and retropharyngeal structures, and a pulmonary mass. Computed tomography (CT) revealed a severely enlarged right medial retropharyngeal lymph node, which caused laryngeal compression, leading to upper airway obstruction. Multiple cervical and thoracic lymph nodes, and the pulmonary mass had an irregular layered/laminated pattern of mineralization...
March 15, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29544019/utility-of-two-view-vs-three-view-abdominal-radiography-in-canines-presenting-with-acute-abdominal-signs
#19
Marina V Mavromatis, Mauricio Solano, Michael Y Thelen
There are clear differences in the normal radiographic appearance of the abdominal organs between a left lateral vs. a right lateral view. While a few veterinary academic institutions have transitioned to a three-view abdominal radiographic study protocol, obtaining only two views of the canine abdomen remains the current standard in veterinary medicine. In this combined retrospective and prospective, case-controlled study, 48 canine patients presenting with signs of acute abdomen were recruited. Four board-certified veterinary radiologists and four general practice veterinarians with greater than 3 years of experience in small animal practice were asked to determine if 10 predetermined findings were present within the set of images and if surgery was recommended based on those findings...
March 15, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29498123/b-mode-and-power-doppler-ultrasonography-of-the-equine-suspensory-ligament-branches-a-descriptive-study-on-13-horses
#20
Silvia Rabba, Sigrid Grulke, Denis Verwilghen, Laurence Evrard, Valeria Busoni
Ultrasonography is routinely used to achieve the diagnosis of equine suspensory ligament desmopathy. In human medicine, power Doppler ultrasonography has also been found to be useful for the diagnosis of tendon/ligament injuries. The aim of this prospective, pilot study was to assess the presence or absence of power Doppler signal in suspensory ligament branches and compare B-mode findings with power Doppler findings in suspensory ligament branches of lame and non-lame limbs. Thirteen horses were used (eight lame horses, with lameness related to pain in the suspensory ligament branches, and five non-lame horses)...
March 1, 2018: Veterinary Radiology & Ultrasound
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