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WSVA7-0241 DIAGNOSTIC IMAGING
QUANTITATIVE COMPUTED TOMOGRAPHY
(CT) ANALYSIS OF PULMONARY PATTERN IN DOGS AFFECTED BY PNEUMONIA, BEFORE AND AFTER INTRAVENOUS CONTRAST MEDIUM ADMINISTRATION
S. Eftekhari1, M. Masoudifard2, M. Nasiri3, A. Rostami3, S. Bayat Sarmadi4, Z. Mohseni5, A. Shariat6
1Faculty of Veterinary Medicine- University of Tehran, Resident of Veterinary Radiology, Tehran, Iran
2Faculty of Veterinary Medicine- University of Tehran, Department of Surgery and Radiology, Tehran, Iran 3Faculty of Veterinary Medicine- University of Tehran, Department of Internal Medicine, Tehran, Iran
4Faculty of Veterinary Medicine- Science and Research Branch- Islamic Azad University, Resident of veterinary Surgery, Tehran, Iran
An Urban Experience
31 till 39, after contrast study was between 46 till 70.
It means the HU has been significantly increased. Also the contrast of the involved lung regions was increased which this helped to differentiate the unhealthy lung tissue from the adjacent soft tissues. Hematology tests in all of the patients were represented the infection
   5Faculty of Veterinary Medicine- University of Tehran, Resident of Veterinary Clinical Pathology, Tehran, Iran 6Iranian Pet Hospital, Private Veterinarian, Tehran, Iran .
 Introduction
Alveolar pattern of the lung field is usually caused by several lung involvements such as edema, hemorrhage and pneumonia, but differentiation using radiography is usually impossible.
Objectives
Evaluation of Hounsfield unit(HU) and lung pattern of pneumonia in dogs using computed tomography (CT- scan) technique and confirmation by CT-assisted fine needle aspiration(FNA) as a safe diagnostic procedure.
Methods
In this study, 10 dogs with respiratory distress suspected for pneumonia were selected and radiography and counting blood cells(CBC) were used for evaluation of lung pattern and cytology. Before and after contrast medium injection, CT-scans of the lung field were achieved. Finally in transverse CT sections, FNA of involved lung lobes was taken for cytologic evaluation. After the confirmation of pneumonia, CT scans reevaluated with more attention and pulmonary pattern was described. HU of involved regions were measured.
Results
In all of patients, ventral region of the lungs especially cranial and middle lung lobes were involved. the involvement of left lungs were prominent. The mean
HU of healthy lung was -778, and HU of unhealthy lung parenchyma before contrast medium study was between
Conclusions
Both CT-scan and CT-assisted-FNA from the lung, for the diagnosis of pulmonary disorders such as pneumonia, are benefitical and practical methods.
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