排序方式： 共有128条查询结果，搜索用时 15 毫秒
31.
Michael K. Stoskopf DVM PHD Elliot K. Fishman MD Thomas D. Williams DVM 《Veterinary radiology & ultrasound》1990,31(3):142-145
Volumetrically correct, three-dimensional color images of the sea otter, ( Enhydra lutris ), were generated from computed tomographic (CT) data using a Sun 3/160 workstation and a Pixar Imaging Computer. These images could be displayed as static images (1024×768) or rotated about any axis in real-time by displaying sequential rotation sequences generated by the Pixar Imaging Computer. The images provided realistic depth of field through overshadowing and differential opacification. This was obtained through an opacification algorithm which traced rays from a selected viewing plane through colored gel volumes, and calculated absorbance percentages as a function of the transparency of the gels penetrated. Reconstructions of this type serve as alternative anatomy tutorials for species otherwise unavailable for routine dissection. They also permit topographical studies without interfering with populations of endangered animals. 相似文献
32.
Bonnie J. Smith DVM PHD Stephen A. Smith MS DVM Kathy A. Spaulding DVM Keven Flammer DVM James E. Smallwood MS DVM 《Veterinary radiology & ultrasound》1990,31(5):226-234
The purpose of the study was to provide a reference for the normal radiographic anatomy of the cockatiel ( Nymphicus hollundis ). The head, body, wing, and pelvic limb of mature males were radiographed using xeroradiographic and conventional radiographic techniques. Ten xeroradiographs and ten corresponding conventional radiographs were selected, and the xeroradiographs appropriately labeled to illustrate the normal radiographic anatomy of these regions. 相似文献
33.
Jackie Tapprest DVM Fabrice Audigie DVM PHD Catherine Radier DM Marie-Christine Anglade DM Marie-Catherine Voisin DM PHD Nathalie Foucher Claire Collobert-Laugier DVM Didier Mathieu DM PHD Jean-marie Denoix DVM PHD 《Veterinary radiology & ultrasound》2003,44(4):438-442
In humans, magnetic resonance (MR) imaging is the method of choice for the diagnosis of stress fractures. In this paper, bilateral stress fracture of the lateral condyle of the third metacarpal bone in a French trotter is described. Results of the radiographic, MR imaging, and histologic examinations are presented, with a focus on the MR signal abnormalities found. Based on this patient, the potential use of MR imaging for the diagnosis of stress fractures in horses is discussed. 相似文献
34.
Karin Hultin Jäderlund DVM Kerstin Hansson DVM Anna-Lena Berg DVM pHd Anders Sjöström MD pHd Kristina Narfström DVM PHD 《Veterinary radiology & ultrasound》2003,44(5):581-588
To evaluate the age of fontanelle closure of normal kittens and the size of their lateral ventricles, 50 ultrasonographic examinations using the bregmatic fontanelle as an acoustic window were made. Seven kittens, laboratory animals, were included in the study. To verify the location of the lateral ventricle, two of the kittens were sacrificed as neonates. In one of them ink was injected prior to autopsy into one lateral ventricle under sonographic guidance. In a longitudinal study of five of the kittens, the skull depth and the depth of the central part of the lateral ventricle reproduced in a longitudinal view could be measured up to the age of about 5 months. During that period, the skull depth increased from a median value of 1.95 cm (1.92-1.98) in a seven-day-old cat to 2.58 cm (2.52-2.59) in a 154-day-old cat, while the afore-mentioned ventricle values increased from 0.3 mm to 1.1 mm. 相似文献
35.
James P. Douglass DVM MS Clifford R. Berry DVM Donald E. Thrall DVM PHD David E. Malarkey DVM PHD Kathy A. Spaulding DVM 《Veterinary radiology & ultrasound》2003,44(1):20-27
The radiographic features of aortic bulb/valve mineralization in 20 dogs were reviewed. Extent, shape, number, and location of mineralization were recorded. Five of the dogs had additional alternate imaging examinations, including bone scintigraphy, echocardiography, and thoracic computed tomography. A necropsy was done on one dog, and the area of mineralization was evaluated using routine histology. The median age was 10 (mean 9.7; SD +/- 2.7) years. There were five males, seven neutered males, one female, and seven neutered females. The breeds were: Irish setter (6); rottweiler (7); chow-chow (1); miniature dachshund (1); borzoi (1); English setter (1); English springer spaniel (1); great Dane (1); and greyhound (1). Dogs with both right and left lateral radiographs (n = 17) had mineralization visible on both views, more conspicuously on the right lateral radiograph (n = 12). Aortic bulb mineralization was identified on the ventrodorsal radiograph of only one dog. On lateral radiographs, the aortic bulb mineralization was localized within the 4th intercostal space and in the craniodorsal quadrant of the cardiac silhouette. In nine of the dogs, there were complex or multiple mineralizations and in 11 dogs, there was a single curvilinear mineral opacity oriented in a caudoventral to craniodorsal direction. In all radiographs, the mineralization was in the expected position of the aortic bulb, and echocardiography (n = 4), spiral computed tomography (n = 2), and necropsy (n = 1) confirmed that the mineralization was within the aortic bulb. Clinical pathologic data of the dogs suggested no reason for metastatic mineralization. Exact etiopathogenesis of the lesions were not determined in this study. Based on the histologic findings in one dog, the mineralization seen in the aortic root is similar to a form of dystrophic mineralization called Monckeberg's calcific arteriosclerosis in humans. No clinical signs attributable to the mineralization were observed. 相似文献
36.
RODGER V. ALLHANDS DVM PHD A. ROBERT TWARDOCK DVM PHD MICHAEL J. BOERO DVM MS 《Veterinary radiology & ultrasound》1987,28(5):181-184
A focal area of increased uptake of radioactivity was observed in muscle during bone imaging with 99m TcMDP. The area was previously the site of a peripheral nerve block with mepivacaine hydrochloride. Additional experiments were done to document the action of the local anesthetic. The effect on uptake decreased over several days. 相似文献
37.
DAVID D. BARBEE DVM MS JENNIFER R. ALLEN BVSC PATRICK R. GAVIN DVM PHD 《Veterinary radiology & ultrasound》1987,28(5):144-151
Computed tomography (CT) is a valuable imaging procedure but one that requires significant technical support. Although scanners are available for veterinary use, their successful installation requires in-depth facility planning. Maintenance costs for these highly complex systems are high and may greatly exceed acquisition costs. Equipment to move anesthetized horses and support them during scanning is also expensive. Transport and scan table equipment suitable for equine CT studies are described. Clinical scan protocols used for CT of the equine skull and extremities are detailed. Precise positioning is essential for interpretable scans. Significant training in anatomy and CT physics is required for the veterinary computed tomographer. 相似文献
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39.
SONOGRAPHIC RENAL FINDINGS IN 20 DOGS WITH LEPTOSPIROSIS 总被引：1，自引：0，他引：1
Lisa J. Forrest VMD Robert T. O'Brien DVM MS Megan S. Tremeling Howard Steinberg VMD PHD A. Jim Cooley DVM Roy L. Kerlin BVSc PHD 《Veterinary radiology & ultrasound》1998,39(4):337-340
Abdominal ultrasound examinations of 20 dogs with confirmed leptospirosis were reviewed retrospectively for renal abnormalities. Three dogs had a normal ultrasound examination. The remaining 17 dogs had sonographic abnormalities of the kidneys. These abnormalities, seen either alone or in combination, included renalmegaly (n=10), pyelectasia (n=9), increased cortical echogenicity (n=15), perinephric effusion (n=5), and a medullary band of increased echogenicity (n=6). At our institution, the medullary band of increased echogencity has only been seen in dogs with leptospirosis and may therefore be a specific sonographic sign for this disease. 相似文献
40.
Gregory B. Daniel DVM MS Robert Denovo DVM MS A. Eric Schultze DVM PHD Dorothy Schmidt BS Gary T. Smith MD 《Veterinary radiology & ultrasound》1998,39(4):375-383
The extraction of the hepatobiliary radiopharmaceutical 99m Tc-mebrofenin ( Choletec ) by the liver can be used to evaluate the severity of hepatocellular disease. The hepatic parenchymal cells extract mebrofenin from the blood by the same active transport mechanism as bilirubin. The ability of the liver to extract 99m Tc-membrofenin is a measure of hepatic parenchymal cell function. In this study, we induced hepatocellular disease by administration of a hepatotoxic drug and compared a direct method of determining the hepatic extraction of 99m Tc-membrofenin to hepatic extraction fraction derived from deconvolutional analysis. We also compared both methods of calculating the hepatic extraction of 99m Tc-membrofenin to liver histopathology. Hepatic extraction fraction derived from deconvolutional analysis correlated very well to the direct measurement technique (R=0.922, p<0.001). Both methods of determining hepatic extraction correlated well to quantitative histopathology, having the same correlation coefficient and p values. (R=-0.833, p=0.003). As the hepatic extraction 99m Tc-membrofenin decreased, the severity of the histopathologic lesions of the liver increased in a linear fashion. There was a significant correlation of the hepatic excretion T1/2 to quantititative histopathology (R=0.949, p<0.001). The hepatic excretion T1/2 increased as the severity of the histopathologic lesions of the liver increased. Hepatic extraction (HEF) and excretion of 99m Tc-membrofenin are good predictors of the severity of hepatocellular damage in toxic induced liver disease. This study helps validate the premise that HEF derived from deconvolutional analysis ois a good predictor of the actual first pass hepatic extraction of 99m Tc-membrofenin. 相似文献