Radiologic investigation of Chest and CVS diseases

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Presentation transcript:

Radiologic investigation of Chest and CVS diseases By Dr Mohamed Sherif El-Sharkawy ASSOCIATE PROF. and Consultant Radiologist KKUH KING SAUD UNIVERSITY LAST UPDATE SEPT. 2013

We mean study of thoracic cage contents What do we mean by chest We mean study of thoracic cage contents

LUNGS

PLAIN FILM=CHEST X-RAY(CXR) CT HRCT ANGIOGRAMS BASIC CHEST EXAMS PLAIN FILM=CHEST X-RAY(CXR) CT HRCT ANGIOGRAMS

Imaging Modalities for chest and CVS examinations 1-Plain films 2-COMPUTED TOMOGRAPHY CT LUNGS AND MEDIASTINUM CT- angiography (CTA) High resolution CT of the chest (HRCT) 3-Angiography 4- MRI

PA VIEW

LATERAL VIEW

AP VIEW

PA vs. AP FALSE ELARGEMENT

Hypo-inspiratory vs inspiratory

Inspiration This greatly helps the radiologist to determine if there are intrapulmonary abnormalities. The diaphragm should be found at about the level of the 8th - 10th posterior rib or 5th - 6th anterior rib on good inspiration.

Rotation The technologists are usually very careful to x-ray the patient flat against the cassette. If there is rotation of the patient, the Mediastinum may look very unusual. One can access patient rotation by observing the clavicular heads and determining whether they are equal distance from the spinous process of the thoracic vertebral bodies.

In this rotated film skin folds can be mistaken for a tension pneumothorax (blue arrows).   Notice the skewed positioning of the heads of the clavicles (red arrows) and the spinous processes.

Rotation

ROTATION

Anatomy on Normal Chest X-Ray Heart borders and chambers of the heart on PA and lateral views.

Frontal Chest X-Ray

Diagram of lungs showing lobes Diagram of lungs showing lobes. The right lung has three lobes, upper, middle and lower. These are separated by the oblique and horizontal fissures. The left lung has two lobes, upper and lower separated by the oblique fissure.

Why these lines are important (1) Horizontal fissure (2) Right oblique fissure, (3) Left oblique fissure. Figure 2.4b (1) Horizontal fissure (2) Right oblique fissure (3) Right upper lobe (4) Right middle lobe (5) Right lower lobe. Figure 2.4c (1) Left oblique fissure (2) Left upper lobe (3) Left lower lobe. Why these lines are important LEFT LUNG RIGHT LUNG

FISSURES 21

CARDIAC Valves This patient had a malfunctioning mitral valve (between left atrium and left ventricle) and aortic valve (between left ventricle and aorta) and prosthetic valves were inserted (better seen on lateral) Frontal CXR LAT CXR Key: Suture material used for repair of vertical incision thru sternum (median sternotomy) Aortic valve prosthesis Mitral valve prosthesis Left hemi diaphragm Right hemi diaphragm 1 1 2 2 3 3 5 4 4 5

MITRAL VALVE REPLACEMENT KKUH

MITRAL VALVE REPLACEMENT LLL COLLAPSE KKUH

LLL COLLAPSE

ROUTINE CXR BREAST SHADOW

How to read Frontal Chest X-Ray

Section on the Silhouette Frontal Chest X-Ray SILHOUETTE See Section on the Silhouette Sign

LUNGS

Frontal Chest X-Ray MEDIASTINUM

Pulmonary embolism

The Aortic arch/great vessels “Man’s Anatomy by Tobias & Arnold

Aortic aneurysm Aortic knob/knuckle

High Resolution CT Scan HRCT uses very thin slices (1mm) to achieve better spatial resolution & precision. HRCT is indicated after normal CXR in a symptomatic patient - the setting of high clinical suspicion of disease. Advantages High sensitivity for adenopathy, infiltrates, and architectural distortion. HRCT can identify areas of reversible vs. irreversible lung damage.

Normal lung at level inferior Normal Lung Anatomy Tracheobronchial Tree Normal lung at level inferior pulmonary veins L inferior pulmonary vein R inferior Lower lobe bronchi

Normal HRCT

Anatomy on Normal Chest X-Ray CXR-PA Anatomy on Normal Chest X-Ray 1 2 2 4 13 Key: Right 1st rib Right 2nd rib Scapula Trachea Carina Bronchus seen end on Bilateral hila Branch of right main descending pulmonary artery Right minor (horizontal fissure) Right hemi diaphragm Left hemi diaphragm Gastric air bubble Left clavicle 3 5 6 7 7 8 9 10 11 12

PA VIEW ANATOMY

Intrapulmonary nodule: hamartoma Frontal Chest X-Ray Intrapulmonary nodule: hamartoma Nodule or right nipple ?

It’s a chest x-ray, not a lung x-ray. Remember It’s a chest x-ray, not a lung x-ray.