Medical Imaging Positioning Considerations Quiz

Patient Positioning in X-ray Imaging

• Standard source-to-image receptor distance (SID) for X-ray imaging: 40-45 inches (100-115 cm)

Collimation and Radiation Protection

• Recommended collimation approach for X-ray imaging of an affected digit: collimate to the affected area to reduce scatter radiation
• Preferred radiation protection shield for every patient during X-ray imaging: lead apron

Markers and Positioning Aids

• Marker placement in X-ray imaging of extremities: at the level of the anatomical area of interest
• Example of a positioning aid used in X-ray imaging: sandbags

Patient Precautions and Instructions

• Recommended position for ambulatory patients during X-ray imaging: standing or sitting upright
• Patient possessions during X-ray imaging: removed and secured outside the exam room
• Breathing instructions for patients during X-ray imaging: hold still and hold breath (if applicable)
• ALARA principle: As Low As Reasonably Achievable (exposure factors)

Pediatric and Geriatric Considerations

• Recommended exposure factor range for upper limb imaging: 50-60 kVp, 2-5 mA
• Purpose of using short exposure time in pediatric imaging: to minimize motion artifact
• Consideration for geriatric patients with osteoporosis: possible need for adapted positioning and immobilization

Immobilization and Image Quality

• Purpose of immobilization devices in pediatric imaging: to minimize motion and prevent movement
• Positioning principle to avoid shape and size distortion in radiographic images: perpendicularity

Trauma and Geriatric Patients

• Recommended protocol for trauma and post-reduction imaging: follow hospital's trauma protocol
• Demeanor of the radiographer when dealing with trauma patients during imaging: calm, reassuring, and empathetic
• Adaptation for geriatric patients due to limited ability: possible need for adapted positioning and assistance