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Radiology OfThe Chest
Plain CXR.
Bronchogram.
Angiogram.
Ultrasound.
CT.
MRI.
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Advantages of
CXR
Simple.
Non invasive.
Rapid.
Cheap.Safe.
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What Is TheValue Of X-Ray
???
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CXR
Valuable in any diagnostic problem in chestor other systems from skin to CNS.
It is a routine investigation especially in :
Fever.
Weight Loss.
Aneroxia.
Trauma.
Pre and Post-operativeTumors.
ICU.
Fitness.
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Diagnostic value In Chest
High diagnostic as in:Pneumonia , abscess.
Elusion , pnx.
Help in diagnosis:
T.B. Tumor.
Heart diseases.
Low value:
Bronchictasis.
P.E.
Mediastinal dis
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Indications
For diagnosis.
Follow up. Response to TTT.
Complications.
With surgery.
Trauma.
Tumor staging.
General Problem.
Assurance.
Medicolegal.
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Pleural diseases
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Heart diseases
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Pneumonia
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Abscess
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T.B.
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Bronchictasis
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Lung Cancer
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Metastasis
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Mediastinaldiseases
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Miscellaneous
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C t d T h
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Computed Tomography
(CT)Technical Background :
The x-ray tube rotate in amoving gantry around the patientwhich lie on a moving table .
Opposite the x-ray tube in themoving gantry lie detectors whichreceive the x-ray beam after
passing through the patient .
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The signal received from thesedetectors pass to a computer
which reconstruct from themand image which representcross section of the patient of
thickness usually 1 cm .
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Contrast administration
Continuous infusion of contrastmaterial by automatic infusionpump for differentiating vascular
from non vascular lesion .
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Attenuation value (CT) number
It is measured by Hounsfield Unit (HU)
Water attenuation 0 HU
Air attenuation -1000 HU
Dense cortical bone +1000 HU
Ad f CT
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Advantages of CT
Cross sectional format which clearlyseparates structures that are super
imposed on each other in CXR.
The high degree of density resolution
which reveales the individual structures
of the mediastinum , chest wall.
CT captures lung , soft tissue and bones
simultaneously with single exposure.
I di i f CT f h h
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Indication of CT of the chest
Lung :
Staging of bronchial carcinoma .
Detection of pulmonary metastases .
Detection of lesions hidden by mediastinum or
diaphragm .
Evaluation of lung in pleural .
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Mediastinum
Abnormal contour.
Hilum
Distinguish vessel from lymph node
Pleura and chest wall
Pleural tumor, mesothelioma.
Invasion of the chest wall by cancer.
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PulmonaryEmbolism
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CT Guided Biopsy
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