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Veterinary Radiology & Ultrasound

Jessica A Stahle, Martha M Larson, John H Rossmeisl, Nick Dervisis, Dana Neelis
In dogs diagnosed with solid tumors, regional lymph node involvement or evidence of distant metastasis can predict worse prognoses and significantly decreased survival. Lymph node size alone has been shown to be insufficient as a predictor for the accurate clinical staging of some canine neoplasia. However, certain regional lymph nodes (including those of the oral cavity) are difficult to access for routine tissue sampling. Diffusion weighted magnetic resonance imaging (MRI) has demonstrated the ability to differentiate metastatic from inflammatory/benign lymph nodes in clinical studies with human cancer patients through the calculation of quantitative values of diffusion termed apparent diffusion coefficients (ADC)...
November 12, 2018: Veterinary Radiology & Ultrasound
Claudia van Zadelhoff, Anna Ehrle, Roswitha Merle, Werner Jahn, Christoph Lischer
Impinging processi spinosi in the equine thoracic spine are a common cause of poor performance in the horse. A modified semiquantitative scintigraphic image analysis has been proposed for the evaluation of equine processi spinosi. This technique showed a high inter- and intraobserver agreement when compared to subjective and semiquantitative image analysis. The aim of this retrospective, method comparison study was to evaluate the agreement of the modified semiquantitative scintigraphic image assessment with previous methods of interpretation and to compare these scintigraphic evaluation techniques with radiographic and clinical findings...
November 5, 2018: Veterinary Radiology & Ultrasound
Courtney Baetge, Kevin J Cummings, Michael Deveau
Radiation therapy requires repeated anesthetic administration to patients who often have multiple comorbidities contributing to an increased rate of anesthetic complications such as pneumonia. This is a retrospective observational study in which data were collected from 146 medical records of dogs receiving repeat anesthesia for radiation treatment from prior to management changes and compared to data from 149 cases treated after completion of management changes. The objective was to determine if changes in case management protocol that were put in place decreased the risk of pneumonia development among these patients...
October 29, 2018: Veterinary Radiology & Ultrasound
Catherine T Gunther-Harrington, Kathryn L Phillips, Lance C Visser, Samantha L Fousse, Joshua A Stern
Coronary artery anomalies have been reported in Bulldogs and present an increased risk when performing balloon valvuloplasty. Identification of coronary anomalies has been reported using multidetector-row computed tomographic (MDCT) angiography with electrocardiographic gating. However, the utility of non-electrocardiographic-gated 16-row computed tomographic for MDCT for the identification of coronary artery anatomy or anomalies to the authors' knowledge has not been fully investigated. The purpose of this study was to evaluate the feasibility of non-electrocardiographic-gated computed tomographic (CT) angiography to identify coronary anomalies in Bulldogs with pulmonary valve stenosis...
October 14, 2018: Veterinary Radiology & Ultrasound
Florence Thierry, Marisa F Ferreira, Gavin K Paterson, Tiziana Liuti, Jorge Del-Pozo
Gastric pneumatosis is an imaging finding defined as the presence of gas foci in the gastric wall. In humans, this imaging feature can result from one of two separate clinical entities: life-threatening emphysematous gastritis or clinically benign gastric emphysema. This retrospective case series study describes the clinical and imaging features in five animals diagnosed with spontaneous gastric pneumatosis without gastric dilatation-volvulus. Three canine and two feline cases of spontaneous gastric pneumatosis were identified on radiographic and ultrasonographic examinations...
October 11, 2018: Veterinary Radiology & Ultrasound
Dayoung Oh, Siheon Lee, Seungji Kim, Sangkyung Choen, Mincheol Choi, Junghee Yoon
Bronchomalacia and bronchial collapse are important causes of chronic coughing in dogs. The current reference standard diagnostic tests for these problems are flexible bronchoscopy and biopsy. Previous human studies have also supported inspiration/expiration computed tomography (CT) as a diagnostic test. The current prospective, pilot study aimed to determine whether inspiration/expiration CT is also a feasible test for quantifying bronchial collapsibility in dogs. Thoracic CT images were acquired using a 64-row multidetector CT for 10 healthy Beagle dogs during maximal inspiration and expiration...
October 11, 2018: Veterinary Radiology & Ultrasound
Daisy J X Liu, Myriam Hesta, Emmelie Stock, Evelien Bogaerts, Bart J G Broeckx, Jimmy H Saunders, Katrien Vanderperren
Contrast-enhanced ultrasound may be helpful for detecting early renal microvascular damage and dysfunction in dogs. However, before this noninvasive imaging method can be tested as an early-stage screening tool in clinical patients, an improved understanding of long-term variation in healthy animals is needed. In this prospective, secondary, longitudinal, serial measurements study, variability of contrast-enhanced ultrasound renal perfusion parameters was described for eight healthy dogs, using seven time points and a period of 83 weeks...
October 1, 2018: Veterinary Radiology & Ultrasound
Erich Spoor, Laura Stainback, Scott Plummer, Kim Knowles
The neurological examination findings, clinical pathology (including Coccidioides immitis IgG/IgM serology) and magnetic resonance imaging (MRI) findings in 13 dogs with a novel form of intracranial coccidioidomycosis are described in a retrospective case series, with long-term clinical resolution documented in 11/13 dogs (84.6% of cases) with oral fluconazole therapy. The medical records of the Veterinary Neurological Center in Phoenix, Arizona from the years 2000 to 2017 were utilized to search for dogs with appropriate inclusion criteria...
September 27, 2018: Veterinary Radiology & Ultrasound
Swan Specchi, Federica Rossi, Chick Weisse, Simona Morabito, Nicholas P Petrovitch, Randi Drees, Florence Thierry, Mario Ricciardi, Rampaipat Penchome, Andrea Armenise, Pascaline Pey, Matthew Paek, Ioannis Panopoulos, Stefano Nicoli, Tobias Schwarz
Arterioportal vascular anomalies are communications between the splanchnic arteries and the portal system that represent a rare cause of presinusoidal portal hypertension in small animals. There is little information concerning the imaging findings of arterioportal communications in small animals and no classification could be found for radiologists and surgeons. The aims of this retrospective descriptive multicentric study were to describe the computed tomographic characteristics of arterioportal communications in a group of cats and dogs, and to propose a classification based on computed tomography (CT) angiographic anatomy...
September 21, 2018: Veterinary Radiology & Ultrasound
Aisha N Young, Pierre Amsellem, Tammy L Muirhead, LeeAnn Pack, Andrea R Matthews
Distal ulnar ostectomy may be performed palliatively in patients with distal ulnar osteosarcoma. Concurrent arthrodesis of the carpus has been proposed to counteract joint instability following transection of carpal ligaments associated with removal of the distal ulna. The objective of this prospective one group pretest, posttest study was to assess stability of the carpus following distal ulnar ostectomy using pre- and postoperative stress radiographic views in a group of canine cadaver limbs. Seven thoracic limbs from six canine cadavers weighing more than 20 kg were obtained...
September 21, 2018: Veterinary Radiology & Ultrasound
Pamela Di Donato, Raffaela Zweifel, Kernt Koehler, Lorenzo Golini, Lorenzo Ressel, Martin Kramer, Ingmar Kiefer, Chee Kin Lim, Nele Ondreka
Neoplasia of the prostate is relatively uncommon in dogs with adenocarcinoma being the most common type. Non-epithelial tumors are rare and only individual cases of malignant lymphoma affecting the prostate have been reported. The purpose of this multi-institutional, retrospective, descriptive study was to characterize the ultrasonographic features of canine prostatic lymphoma. Inclusion criteria were an abdominal ultrasound and cytological/histological diagnosis of malignant prostatic lymphoma. Ultrasonographic features were recorded based on the original ultrasonographic reports and consensus opinion of two readers on the available image sets retrospectively...
September 21, 2018: Veterinary Radiology & Ultrasound
Florence Thierry, Jennifer Chau, Mariano Makara, Swan Specchi, Edoardo Auriemma, Maurizio Longo, Ian Handel, Tobias Schwarz
Multiphasic multidetector computed tomographic angiography is a standard diagnostic test for canine abdominal vascular disorders. Three imaging protocols have been previously described. The test-bolus protocol allows precise timing but can be time consuming to perform. Bolus-tracking software is fast and easy to use but can be problematic for exact timing of vascular phases. A recently described fixed-injection-duration protocol is not influenced by body weight and provides a wider temporal window for arterial acquisitions...
September 7, 2018: Veterinary Radiology & Ultrasound
Yun-Hye Kim, Gum-Joo Choi, Chul Park
Although the major pathological feature of chronic mitral valve disease is mitral regurgitation, myocardial dysfunction has been suggested to be present in dogs with chronic mitral valve disease. However, accurate assessment of myocardial function remains challenging. Doppler-derived rate of left ventricular pressure change is a simple, less load-dependent method for evaluating myocardial function. We aimed to evaluate Doppler-derived rate of left ventricular pressure change for assessing myocardial function in different stages of dogs with chronic mitral valve disease...
September 5, 2018: Veterinary Radiology & Ultrasound
Meagan A Walker, Mathew R A MacCormick, Jessica J Kilkenny, John Phillips, Ameet Singh, Alex Zur Linden
Radiological skills including ultrasonography and fluoroscopy, require a combination of manual dexterity and visuospatial skill to develop competency. The ability to detect veterinary students with an interest in radiology but who are deficient in these skills, may permit more individual adaptations to training programs, allowing for students training in radiology to achieve maximal potential. The objective of this cohort study was to investigate whether innate dexterity and visuospatial skill could be used to predict performance of basic ultrasound and fluoroscopic skills in veterinary students...
September 4, 2018: Veterinary Radiology & Ultrasound
Kathleen Tsimbas, Michelle Turek, Neil Christensen, David M Vail, Lisa Forrest
Radiotherapy is the treatment of choice for non-resectable canine thyroid carcinoma. High tumor response rates and median survival times of 2 years or longer have been previously reported with conventionally fractionated and hypofractionated protocols, even in dogs with distant metastasis. The objective of this retrospective, descriptive, case series study was to evaluate the clinical outcomes of dogs with thyroid carcinoma irradiated with palliative intent using hypofractionated radiotherapy at our institution...
September 4, 2018: Veterinary Radiology & Ultrasound
Stefano Schiavo, Eugenio Cillán-García, Yvonne Elce, Tiziana Liuti, Sarah E Taylor
Solar foot penetration is one of the causes of deep digital flexor tendon injuries in horses, however, limited information is available on the prognosis for return to soundness in the absence of synovial sepsis. Objectives of this retrospective observational study were to describe low-field magnetic resonance imaging (MRI) findings and long-term outcome for a group of horses with this combination of clinical problems. Horses were included if low-field standing MRI of the foot was performed following puncture wounds, injury of the deep digital flexor tendon was diagnosed, and sepsis was confirmed to be absent in all adjacent synovial structures (distal interphalangeal joint, navicular bursa, and digital flexor tendon sheath)...
August 29, 2018: Veterinary Radiology & Ultrasound
Janina Bartels, Silke Hecht, Gordon A Conklin, Sun Xiaocun
As gadolinium-based contrast agents are paramagnetic and have T2 shortening effects, they have the potential to adversely affect gradient recalled echo sequences. The aim of this prospective, cross-sectional study was to evaluate the effects of gadolinium administration on T2*-weighted sequence diagnostic quality and signal intensity when imaging the canine brain. A total of 100 dogs underwent brain magnetic resonance imaging (MRI) including pre- and postcontrast T2*-weighted sequences acquired with a delay (Group A) or immediately (Group B) following gadolinium administration...
August 29, 2018: Veterinary Radiology & Ultrasound
Jodie Daglish, David D Frisbie, Kurt T Selberg, Myra F Barrett
High field magnetic resonance imaging (MRI) is increasingly used for horses with suspected stifle disease, however there is limited available information on normal imaging anatomy and potential incidental findings. The aim of this prospective, anatomic study was to develop an optimized high field MRI protocol for evaluation of the equine stifle and provide detailed descriptions of the normal MRI appearance of the stifle soft tissues, using ultrasound and gross pathological examination as comparison tests. Nine cadaver limbs were acquired from clinically normal horses...
August 22, 2018: Veterinary Radiology & Ultrasound
Toshiyuki Tanaka, Hideo Akiyoshi, Keiichiro Mie, Mari Okamoto, Yuuki Yoshida, Shohei Kurokawa
In humans, computed tomography (CT) is a widely performed technique for the diagnosis and staging of gastric tumors. The purpose of this retrospective case series study was to describe CT findings in a group of dogs with confirmed gastric tumors. For each included dog, the following CT parameters were recorded: gastric tumor location, tumor shape, gastric involvement pattern, tumor enhancement pattern in early and late phases, presence and location of lymphadenopathy, gastric tumor attenuation values, attenuation values of enlarged lymph nodes, maximum short-axis diameter (mm) of enlarged lymph node, maximum long-axis diameter (mm) of enlarged lymph node, and short-axis diameter to long-axis diameter ratio (short axis/long axis)...
August 19, 2018: Veterinary Radiology & Ultrasound
Rita Martins Garcia da Fonseca, Laurence Evrard, Silvia Rabba, Alexandra Salciccia, Valeria Busoni
Lesions of the manica flexoria are a tenoscopic finding in horses with digital flexor tendon sheath tenosynovitis. This retrospective case series study describes the ultrasonographic findings in seven horses admitted for digital flexor tendon sheath swelling associated with lameness and tenoscopic confirmation of a manica flexoria tear. Six horses had a partial manica flexoria tear, one a complete rupture. The ultrasonographic examination included a static examination on the weight and non-weight bearing limb and a dynamic limb assessment during flexion and extension...
August 19, 2018: Veterinary Radiology & Ultrasound
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