Search Results

You are looking at 1 - 10 of 11 items for :

  • Diagnostic Imaging x
  • Refine by Access: All Content x
Clear All

Abstract

Objective—To determine the effects of recumbency on air sac volume, lung volume, and lung densities in CT images of healthy, conscious and anesthetized spontaneously breathing Humboldt penguins (Spheniscus humboldti).

Animals—25 adult (13 male and 12 female) Humboldt penguins.

Procedures—CT images of conscious penguins in ventral recumbency and anesthetized penguins in dorsal, ventral, and right lateral recumbency were obtained. Air sac volume, lung volume, and lung densities in CT images were calculated. A paired samples t test was used to determine whether right and left lung densities differed among recumbencies. Repeated-measures ANOVA (controlled for sex and order of recumbencies during CT) was used to determine whether air sac or lung volumes differed among recumbencies.

Results—Recumbency had a significant effect on air sac volume but not lung volume. Air sac volume was largest in conscious penguins in ventral recumbency (mean ± SD, 347.2 ± 103.1 cm3) and lowest in anesthetized penguins in dorsal recumbency (median, 202.0 cm3; 10th to 90th percentile, 129.2 to 280.3 cm3). Lung densities were highest in anesthetized penguins in dorsal recumbency (right lung median, 0.522 g/cm3; left lung median, 0.511 g/cm3) and lowest in anesthetized penguins in ventral recumbency (right lung median, 0.488 g/cm3; left lung median, 0.482 g/cm3).

Conclusions and Clinical Relevance—Results indicated that anesthetized Humboldt penguins had the lowest air sac volume and highest lung densities in dorsal recumbency. Therefore, this recumbency may not be recommended. Minimal changes in lung volume were detected among recumbencies or between conscious and anesthetized penguins.

Full access
in American Journal of Veterinary Research

methods. 10–12 Since the original Macdonald criteria were developed, new criteria have been proposed to assess therapeutic responses in both human and veterinary neuro-oncology patients. For brain tumor evaluation in human medicine, these include updated

Full access
in American Journal of Veterinary Research

References 1. Christman J , Devau M , Wilson-Robles H , Oncology of reptiles . Vet Clin North Am Exot Anim Pract 2017 ; 20 : 87 – 110 . 10.1016/j.cvex.2016.07.003 2. Hannon DE , Garner MM , Reavill DR . Squamous

Full access
in American Journal of Veterinary Research

validation study . AJNR Am J Neuroradiol 1999 ; 20 : 63 – 73 . 6. Evelhoch JL . Key factors in the acquisition of contrast kinetic data for oncology . J Magn Reson Imaging 1999 ; 10 : 254 – 259 . 10.1002/(SICI)1522-2586(199909)10:3<254::AID-JMRI5

Full access
in American Journal of Veterinary Research

neuro-oncology, perfusion-weighted imaging is helpful in the characterization and classification of brain tumors, planning the region used for biopsy, and controlling treatment. 3,4,14 Additional applications are the evaluation of neurodegenerative

Full access
in American Journal of Veterinary Research

. Miscellaneous tumors . In: Vail DM , Thamm DH , Liptak JM , eds. Withrow and MacEwen's Small Animal Clinical Oncology . 6th ed. Elsevier ; 2020 : 773 – 810 . 4. Wood CA , Moore AS , Gliatto JM , Ablin LA , Berg RJ , Rand WM

Free access
in American Journal of Veterinary Research

Health Organization Collaboration Center for Worldwide Reference on Comparative Oncology , 1999 ; 1 – 49 . 15 Zonderland HM . The role of ultrasound in the diagnosis of breast cancer . Semin Ultrasound CT MR 2000 ; 21 : 317 – 324 . 10.1016/S0887

Full access
in American Journal of Veterinary Research

Introduction Positron emission tomography (PET)/CT is commonly used in human medicine and has gained importance recently in veterinary medicine, particularly in oncology, with regard to diagnosing and staging a variety of diseases and

Full access
in American Journal of Veterinary Research

. Weisse C . Veterinary interventional oncology: from concept to clinic . Vet J 2015 ; 205 : 198 – 203 . 10.1016/j.tvjl.2015.03.027 26. Weisse C . Introduction to interventional radiology for the criticalist . J Vet Emerg Crit Care (San

Full access
in American Journal of Veterinary Research

. 2015 ; 22 ( 3 ): 212 – 220 . 10.1007/s12282-012-0421-7 2. Biller B , Berg J , Garrett L , 2016 AAHA oncology guidelines for dogs and cats . J Am Anim Hosp Assoc. 2016 ; 52 ( 4 ): 181 – 204 . 10.5326/JAAHA-MS-6570 3. Binder M

Full access
in American Journal of Veterinary Research