Radiographic Positioning And Related Anatomy Ch. 2
Radiographic Positioning And Related Anatomy Ch. 2
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Radiographic Positioning And Related Anatomy Ch. 2
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Radiographic Positioning And Related Anatomy Ch. 2
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Radiographic Positioning And Related Anatomy Ch. 2
Radiographic Positioning And Related Anatomy Ch. 2
Thorax and Chest Anatomy
1. Definition of Chest (Thorax): - The upper portion of the trunk between the neck and abdomen.
2. Divisions of the Chest: - Bony thorax - Respiratory system proper - Mediastinum
3. Bony Thorax: - Protective framewo...
Radiographic Positioning And Related Anatomy Ch. 2
Thorax and Chest Anatomy
1. Definition of Chest (Thorax):
- The upper portion of the trunk between the neck and abdomen.
2. Divisions of the Chest:
- Bony thorax
- Respiratory system proper
- Mediastinum
3. Bony Thorax:
- Protective framework for parts of the chest involved in breathing and blood circulation.
4. Sternum:
- Commonly known as the breast bone.
- Divided into:
- Manubrium (superior portion)
- Body (largest central portion)
- Xiphoid Process (smaller inferior portion)
5. Divisions of Bony Thorax:
- Superiorly consists of:
- 2 clavicles (collarbones) that connect the sternum to the scapulae (shoulder blades)
- Ribs that encircle the thorax
- 12 thoracic vertebrae
6. Total Number of Ribs:
- 12 pairs, totaling 24 ribs.
, Landmarks for Chest Positioning
1. Vertebra Prominens:
- 7th cervical vertebra; an important landmark for determining the CR location on a PA chest
projection.
2. Jugular Notch:
- Located at the 2nd and 3rd thoracic vertebrae; used for determining CR placement on
anteroposterior chest projections.
3. Midthorax Centering:
- 7th thoracic vertebra is the location on the mid-sagittal plane where the PA chest X-ray should be
centered (top of the lungs).
4. Sternal Angle:
- Located at the 4th or 5th thoracic vertebra.
5. Xiphoid Process Tip:
- Located at the 9th or 10th thoracic vertebra; separates the thoracic cavity from the abdominal cavity.
Respiratory System Anatomy
1. Divisions of the Respiratory System:
- Pharynx
- Trachea
- Right and left bronchi
- Lungs
2. Diaphragm:
- Primary muscle of inspiration.
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