Rad Positioning - Chest - Test Review Flashcards
Where would fluid be in lateral decubitus chest position?
Left decubitus - left lung
Right decubitus - right lung
What device is used for pediatric chest X-ray?
Pigg-O-Statt
Sthenic
Average physique
50% of population
Hypersthenic
Wider physique
5% of population
Hyposthenic
Skinny physique
35% of population
Asthenic
Tall and skinny physique
10% of population
Why is chest X-ray SID 72” vs. 40”?
Reduces distortion (magnification)
Higher image resolution
Why is grid important in PA chest X-ray?
Absorbs scatter
Better image
What is demonstrated on lateral chest X-ray?
Lungs
Sternum
Thorax
Posterior ribs
Heart
Situs inversus
Heart is on right side of body
Use of marker indicates this to radiologist
Hemothorax
Blood accumulation in pleural space
Pneumothorax
Air accumulation in pleural space
Creates pressure against lung - possible lung collapse
Emphysema
Lungs lose elasticity
Lungs become radiolucent, require less mAs
Lung dimensions become longer
Geriatric patient
Shallow lung field
CR needs to be higher
Kyphosis
Hump-back curvature
Lateral chest position - increased OID causes costophrenic angle off the IR - what should you do?
Lower the CR by 1 inch
PA chest - rib cage and pelvis alignment
Need to be aligned right on top of each other
If not - patient is leaning to one side
RAO
Patient’s right anterior is up against IR
Side of interest is left lung
LAO
Patient’s left anterior is up against IR
Side of interest is right lung
What pathologies seen on expiration chest X-ray?
Pneumothorax
COPD
Why do we roll shoulders forward in PA chest X-ray?
Get scapulae out of the way
PA chest X-ray- midsagittal plane is parallel or perpendicular to IR?
Perpendicular
PA chest X-ray - midcoronal plane is parallel or perpendicular to IR?
Parallel
Lateral chest X-ray - midsagittal plane is parallel or perpendicular to IR?
Parallel
Lateral chest X-ray - midcoronal plane is parallel or perpendicular to IR?
Perpendicular
What happens to diaphragm when taking deep inspiration?
Moves downward
Range of kVp for chest X-ray
110-125 kVp
Lateral chest X-ray - how should weight be distributed on patient’s standing feet?
Equal weight on both feet
CR location in relation to IR
Smack in the middle of IR
What jewelry needs to be removed for chest X-ray?
Necklaces
Nipple rings