systematic in interpretation of pediatric chest x-ray in interpretation of pediatric chest... ·...
TRANSCRIPT
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Systematic in interpretation of
pediatric chest X-ray
M. Mearadji
International Foundation for
Pediatric Imaging Aid
Rotterdam, The Netherlands
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Introduction
• 45% of conventional radiological studies
are chest radiographs
• Systematic review of chest radiographs is
necessary for accurate evaluation
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12 important topics
1. Technique
2. Tracheo-bronchial tree
3. Diaphragm
4. Lung parenchyma
5. Hilum
6. Heart and lower mediastinum
7. Upper mediastinum
8. Skeletal system of the chest
9. Pleura
10. Upper abdomen
11. Soft tissues
12. Used medical accessories (tube, drains, catheters etc)
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Normal chest X-ray
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Technique
• Inspiration
• Symmetry
• Projection
• Exposure
• Radiation protection
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Inspiration Expiration
Chest X-ray without shuttering
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Tracheo-bronchial tree
• Position trachea compared to vertebrae
• Displacement of trachea (mind: rotation
head!)
• Stenosis of trachea and main bronchi
• Foreign bodies in airways
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Agenesis of the trachea Esophagus, no
trachea seen at
bronchography
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Diaphragm
• Position
• Configuration
• Sharpness
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Diaphragm Position
• Normal position:
6th rib ventrally at inspiration
• Elevated diaphragm:
Paralysis n. phrenicus
Atelectasis
High intra-abdominal pressure (tumor or other causes)
• Low position of diaphragm:
Dyspnea, asthma
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Diaphragm Configuration
• Curved
Paralysis n. phrenicus
Liver enlargement and abdominal tumor
Partial relaxation
• Flattened
Excessive low position of the diaphragm
(asthma, dyspnea)
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Relaxation right diaphragm Flattened and low positioned
diaphragm in asthma patient
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Paralysis of phrenic nerve
Chest radiograph Ultrasound
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Diaphragm Sharpness
• Normal
Sharp delineation of diaphragm and lung parenchyma
• Blurring
Pleural effusion
Infiltrate
Atelectasis
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Bilateral basal pneumonia
(L>R), blurring of diaphragm
contour
Lymphosarcoma with some
pleural fluid remaining after
drainage. Diaphragm not
sharply delineated.
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Lung parenchyma
• Lucency
• Consolidation
• Vascular aspects
• Peribronchial thickening
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Longparenchyma Lucency
• Hyperlucency
Dyspnea, asthma
Obstruction
Mind: overexposure
• Hypolucency
Early stage of atelectasis
Obstruction of bronchus
Mind: underexposure, expiration
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Foreign body in the left main
bronchus with an obstructive
emphysema
Cystic deformity of the left
lung.
Hyperlucent left lung
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Hyaline membrane disease with
hypolucent lungs
Wet lung disease with
hyperlucent lungs
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Longparenchyma Consolidation
• Distribution
Focal or diffuse
Interstitial or alveolar
• Cause
Atelectasis
Infiltrate
Tumor
• Mind: Consolidation behind heartshadow!
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Bronchopneumonia right
middle lobe
Post pneumonia abcess right
upper lobe
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Lobar pneumonia right
upper lobe
Dissiminated infiltration
in M. Wegener
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Atelectasis due to intubation
Atelectasis due to
aspirated foreign body at
the left side
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Interstitial pneumonia
(Pneumocystis carinii)
Interstitial pneumonia
allergic toxic genesis
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Longparenchyma Pulmonal vascularity
• Increased arterial vascularity VSD, ASD
Open ductus Botalli
• Increased venous vascularity Left decompensation
Anomalous pulmonary venous return
• Decreased vascularity Pulmonary hypertension
Fallot’s tetralogy
Shock
Pulmonary embolism
Swyer-James syndrome
Emphysema
Pulmonary hypoplasia
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Atrial septum defect (ASD)
Increased arterial vascularity
Fallot’s Tetralogy
Reduced vascularity
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Pulmonary embolism with
reduced vascularity right sided
Nuclear scan: No activity in the
right lung
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Anomalous pulmonary
venous return with
vascular congestion Vascular congestion in cardiac
decompensation in mitral valve
defect
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Longparenchyma Peribronchial thickening
• Present in all aspecific chronic
inflammation/infection of the airways e.g.
in asthma and viral infections
• Iatrogenic: after longlasting ventilation
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Peribronchial thickening in a
patient with an asthma
bronchiale attack
Peribronchial thickening
due to hypersecretion in
RSV infection
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Hilum
Widened
• Vascular:
Arterial: ASD, VSD, ductus Botalli
Venous: cardiac decompensation
• Lymphadenopathy
Inflammatory: TBC
Malignancy: M. Hodgkin, lymphosarcoma
Generalized disease: sarcoidosis
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Open ductus Botalli with
prominent hilum and venous
congestion
Primary lung TBC with
bilateral hilar
lymphadenopathy
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Heart and lower mediastinum
• Heart size (cardio-thoracic index)
• Heart shape
Apex, waist, right heartcontour
• Position of the heart
Dextrocardia, dextroposition
Displacement due to pleuro-pulmonary cause
• Space occupying masses
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Increased heart size and
abnormal configuration in ASD
Abnormal heart configuration
in Fallot’s tetralogy
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Displacement of the heart to
the right side due to agenesis
of the right lung (space saving
effect)
Displacement of the heart to
the right side due to pleural
effusion and tumor (space
occupying effect)
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Cardiomegaly in a case with
purulent pericarditis
Small heart in a case of
asthma bronchiale
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Upper mediastinum
Widened
• Thymus, thymoma
• Esophagus
• Great vessels (aortic coarctation)
• Lymphoma
• Thyroid
• Teratoma
• Neurogenic tumors (neuroblastoma, neurofibroma)
• Trachea (bronchogenic cyst)
• Hemorrhage
• Iatrogenic causes
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Overprojection of heart and
mediastinum by thymus (curtain
effect)
Ultrasound image of
normal thymus
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Normal large thymus with
typical configuration Thymus ‘curtain’ over heart
shadow and mediastinum
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Pathologic thymus in 2 cases with T-cell leukemia
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Lymphosarcoma with
mediastinal and hilar
adenopathy
Mediastinal lymphadenopathy
in a case of M. Hodgkin
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Mediastinal widening in
achalasia
Air-fluid level
Right sided aortic arch
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Bronchogenic cyst with widening of mediastinum superior
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Right sided neuroblastoma of
mediastinum
Right sided ganglioneurinoma
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Skeletal structures
• Disturbance of skeletal mineralisation (e.g. rickets)
• Position anomalies of thoracic spine
• Rib anomalies
• Fractures
• Generalized disorders
• Osteomyelitis
• Tumors
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Iatrogic ribfractures after fysiotherapy in BPD (Bronchopulmonal dysplasia)
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Right sided ewingsarcoma 9th rib
with additional soft tissue tumor Ribanomalies in a case of
Jarcho-Levin syndrome
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Fracture of the left clavicle caused by a traumatic partus
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Pleura
• Pleural adhesions
• Pleural effusion (exsudate, empyema)
• Pneumothorax
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Subpleural pneumothorax on
the right side in a case of
chronic airway infection Left sided pneumothorax
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Right-sided
pleura-empyema
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Upper abdomen
• Pneumoperitoneum
• Malposition of stomach and liver
• Colon interposition
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Scimitar syndrome
Increased lucency of left
colon flexure Loose clip descendent on the
level of the abdominal aorta
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Soft tissues
• Chest wall edema
• Tumor originated from thoracic wall
• Subcutaneous emphysema
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Soft tissue edema of the chest
wall due to capillary leak after
surfactant therapy
Mediastinal soft tissue
accompanied by hygroma
colli extending in
mediastinum
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Medical accessories in situ
• Location of trachea tube
• Thorax drains
• Central lines
• Ventricle drains (liquor drains)
• Pacemaker
• Valve prosthesis
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Malposition of the feeding tube
in the esophagus
Pneumomediastinum due to
esophagus perforation in a
premature baby
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Conclusions
• Chest radiographs in expiration or
overexposed images cannot be interpreted
• Evaluation of chest radiographs should not
only be focused on the clinical question
• Systematic approach in evaluation of
chest radiographs facilitates accurate
diagnosis
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Conclusions
• Iatrogenic changes of the chest film need special attention especially in intensive care patients
• Normal retrosternal thymus shadow functions as ‘curtain’ over the heartshadow
• Hilar structures need special attention because of possible primary TBC