摘要:

Radiolucent crescents found in the cortical bone of the flexor central eminence are normal variations of equine navicular bones and represent the radiographic presentation of a curvature in the central eminence that is best visualized when a dorsoproximal‐palmarodistal beam angle of approximately 45° is us

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb01785.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Osseous bodies associated with the impar ligament have been reported to be chip fractures of the distal margin of the navicular bone and a radiographic finding in navicular disease. This study demonstrates that chip fractures do exist along the distal margin of the navicular bone and that there are, in addition, three other processes by which bone tissue may develop in the impar ligament: (i) ossification secondary to ligamentous damage, (ii) separate centers of ossification within the impar ligament, and (iii) ossification of cartilage particles in adjacent synovial tissue.

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb01786.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Nasal cavity radiographs and CT images from 31 dogs with nasal cavity cancer were compared. All dogs had abnormal clinical signs relating to ‐nasal cancer and histologic confirmation of malignant nasal cavity neoplasia. No dog had cyto reductive surgery prior to imaging. All radiographic and CT examinations were abnormal. CT was more accurate than radiographs in identifying unilateral versus bilateral nasal cavity disease and tumor extension into adjacent structures such as the cranial cavity, hard palate, and pterygopala‐tine fossa. The improved accuracy of CT in these respects was not of benefit in the confirmation of nasal cavity disease because radiographs were abnormal in every instance. However, CT may be useful for more accurate tumor staging, predicting possible treatment‐related complications, and planning of surgery and radiation therapy. It was also determined that one dorsally located radiation therapy portal bounded laterally by the medial ocular canthi, as described in previous reports, would not have been adequate for encompassing all abnormal tissue in 28 of the 31 dogs eval

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb01787.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb01788.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Transcolonic123I‐Iodoamphetamine is rapidly absorbed across the colonic mucosa and binds to amine receptors in the liver and lungs. During the first ten minutes following colonic administration, a simple ratio of lung counts to lung counts plus liver counts provides an accurate estimate of the fraction of portal blood that bypasses hepatic sinusoids in dogs with portosystemic shunts. Studies were performed on 24 dogs with suspect portosystemic shunt. Shunt fraction values for 18 dogs with surgically confirmed portosystemic shunt were obviously higher than published values for normal dogs, and also significantly higher than values for the other six dogs, later confirmed to lack shunts. Postoperative studies were repeated on ten dogs with single shunt vessels 1–2 days after shunt closure. Total shunt ligation resulted in normal postoperative shunt fraction, whereas partial shunt ligation resulted in persistant elevation of shunt fraction. Transcolonic iodoamphetamine scintigraphy is noninvasive, easy to perform, and provides an accurate method to diagnose dogs with portosystemic sh

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb01789.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Monoclonal antibodies specificfor Dirofilaria immitiswere labeled with technetium‐99m (99mTc) and testedin vivoin five heartworm positive and five heartworm negative dogs. Diethlyenetriaminepentaactic acid (DTPA) was used to label the99mTc to the antibody. Radiochemical purity of the99mTc‐labeled antibodies (99mTc‐MoAb) was determined by gel filtration and by instant thin‐layer chromatography. The uptake percentages in the blood, heart, lung, liver, and kidneys were determined from tissues obtained at necropsy and by computer analysis of images obtained at two and 24 hours. The percent uptake in the heart region of interest (ROI) at two hours was significantly higher in the heartworm‐positive dogs. There was significant correlation between the uptake in the heart at two hours to the number and activity of the worms at

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb01790.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

99mTc‐methylene diphosphonate (MDP) radionuclide imaging examinations were done in four horses having clinical evidence of skull trauma or infection. Radiographs were made of each horse prior to scintigraphy. Four case histories are presented. In each instance, scintigraphy provided complementary information to that obtainable through radiography, which aided in accurately localizing and characterizing the site and extent of abnormalities, and which proved particularly valuable as an aid for therapeutic plannin

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb01791.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb01792.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Vx2 carcinoma was induced in the rabbit kidney by percutaneous injection of a tumor‐cell suspension. A focal renal mass similar in appearance to spontaneous renal carcinoma was produced. The mass could be detected with ultrasound as early as one week post injection, however it could not be identified until two weeks post injection using renal angiography and excretory urography. The renal tumor was recognized with ultrasound as an alteration in the cortical outline and obliteration of the renal medulla. A small amount of perirenal fluid was identified at two weeks. Intra‐and extrarenal tumors were evident at three weeks with hypoechoic and anechoic areas evident within the large extrarenal mass observed four weeks post injection. Hypoechoic areas observed with ultrasound corresponded to areas of necrosis and hemorrhage while anechoic areas represented fluid accumulation within and around the tumor. Transplanted tumors were detected by ultrasound before they were evident on either the renal angiogram or excretory urogram. Ultrasound is useful as a screening procedure when renal tumor is suspec

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb01793.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY