They are used to help detect small pneumothoraces (although sensitivity is not increased over inspiratory chest radiographs 1), and to assess for inhaled foreign bodies or gas trapping in COPD 2,3.
- 1 Why are proper breathing instructions important when taking a radiograph of the chest?
- 2 Should we perform an inspiratory or an expiratory chest radiograph for the initial diagnosis of pneumothorax?
- 3 Why is chest AP View done?
- 4 What is the reason for magnification of heart in chest AP projection?
- 5 Why is there an increase in the chest circumference during inspiration and what is the significance?
- 6 What is chest inspiration and expiration?
- 7 How do you assess the degree of inspiration?
- 8 What does poor inspiration mean?
- 9 What is Lordotic view?
- 10 What does AP mean in radiology?
- 11 How is HRCT chest done?
- 12 What is AP and LAT?
- 13 Why is the upright position preferred for chest radiography?
- 14 What is the difference between view and projection in radiography?
- 15 What is the recommended landmark for chest AP projection?
Why are proper breathing instructions important when taking a radiograph of the chest?
Holding your breath after inhaling helps your heart and lungs show up more clearly on the image.
Should we perform an inspiratory or an expiratory chest radiograph for the initial diagnosis of pneumothorax?
Inspiratory radiographs are recommended as the initial examination of choice for pneumothorax detection, an addi- tional expiratory radiograph is only recom- mended in doubtful cases. demonstrate a greater width than during expiration.
Why is chest AP View done?
Indications. The erect anteroposterior chest view is an alternative to the PA view when the patient is too unwell to tolerate standing or leaving the bed 1. The AP view examines the lungs, bony thoracic cavity, mediastinum, and great vessels.
What is the reason for magnification of heart in chest AP projection?
The heart, being an anterior structure within the chest, is magnified by an AP view. Magnification is exaggerated further by the shorter distance between the X-ray source and the patient, often required when acquiring an AP image. This leads to a more divergent beam to cover the same anatomical field.
Why is there an increase in the chest circumference during inspiration and what is the significance?
When the lungs inhale, the diaphragm contracts and pulls downward. At the same time, the muscles between the ribs contract and pull upward. This increases the size of the thoracic cavity and decreases the pressure inside. As a result, the lungs contract and air is forced out.
What is chest inspiration and expiration?
The processes of inspiration (breathing in) and expiration (breathing out) are vital for providing oxygen to tissues and removing carbon dioxide from the body. Inspiration occurs via active contraction of muscles – such as the diaphragm – whereas expiration tends to be passive, unless it is forced.
How do you assess the degree of inspiration?
To assess the degree of inspiration it is conventional to count ribs down to the diaphragm. The diaphragm should be intersected by the 5th to 7th anterior ribs in the mid-clavicular line. Less is a sign of incomplete inspiration.
What does poor inspiration mean?
Films taken without a full inspiration are described as having a “ poor inspiratory result ”. This may result from a poor inspiratory effort or any other condition that prevents full inspiration. This patient’s chest x-ray is normal in full inspiration.
What is Lordotic view?
A lordotic views is most commonly acquired accidentally due to incorrect patient positioning. The clavicles appear high such that the lung apices are not visible above the clavicles. The ribs appear more horizontal and are more V-shaped than C-shaped. Too much of the abdomen may be visible on the image.
What does AP mean in radiology?
AP, X-ray: An X-ray picture in which the beams pass from front-to-back ( anteroposterior ). As opposed to a PA (posteroanterior) film in which the rays pass through the body from back-to-front.
How is HRCT chest done?
CT (computerised tomography) and HRCT (high-resolution computerised tomography) scanning uses X-rays to produce detailed images of the inside of your body. These images show cross sections (slices) through the heart and lungs.
What is AP and LAT?
Uses of X-Ray (AP / LAT View) Test. A chest x-ray is used to perform in AP as well lateral view to evaluate lungs, heart and chest wall. It is a first imaging test to diagnose symptoms like difficulty in breathing, a bad and persistent cough, chest pain or injury and fever.
Why is the upright position preferred for chest radiography?
The upright position is preferred for the following reasons: It prevents engorgement (an excess of blood) of pulmonary vessels, whereas supine or recumbent positioning tends to increase engorgement of pulmonary vessels, which can change the radiographic appearance of these vessels and the lungs.
What is the difference between view and projection in radiography?
The term projection is used to describe a positioning technique; it does not refer to the radiographic image. View: Pertains to the radiographic image only. The terminology used to describe the positioning technique will simply be applied to the image, but the word view will replace the term position or projection.
What is the recommended landmark for chest AP projection?
The jugular notch is the recommended landmark for the location of the CR for AP chest radiographs. The notch is used for locating the center of the lung fields at the T7 level (mid-thorax).