Extremities Flashcards
Hand PA
SID- 40 in
Part position - hand open fingers, extend, with palmar surface in contact with ir.
Central ray - perpendicular to second MCP joint same for PA oblique
Hand lateral
Medial aspect of hand is in contact with ir with coronal plane of hand perpendicular to ir. Thumb is positioned as PA projection
Central ray- perpendicular to second mcp joint
PA Wrist
Part position
PA - anterior surface of wrist is in contact with it fingers are flexed to form a loose fist, placing wrist in former contact with ir and opening intercarpal joints
Central ray- perpendicular to mid carpal area
Wrist Pa oblique
Lateral body position and central ray
Position
Oblique rotate laterally. 45 degree use sponge if available
Lateral rotate laterally on to side, ulnar side on cassette
Central ray perpendicular to the midcarpal area
The small long bones of the digits are called
Phalanges
The long narrow bone located anterior to the upper portion of the rib cage and commonly know as collarbone is the
Clavicle
What is the bony landmark for wrist positioning that is a prominence on the lateral aspect of the wrist (patient is in anatomic position)
Styloid process of the radius
The head of the radius articulate with the rounded process of the distal humerus that is called
Capitulum
Why is the stair step sponge used for a PA oblique projection of the hand when the fingers are of interest
Improved visualization of the Interphalangeal joints
When positioning the hand pa oblique projection the modified teacup position the surface of the hand in contact with the ir is
Anteromedial
The pa projection of the wrist in ulnar deviation is a valuable addition to the routine wrist series in cases of
Scaphoid fracture
The projection that constitutes a routine examination of the forearm are
Ap and lateral
What is the minimum SID distance used for nearly all radiographic images of the upper limb
40 in
Describe how the hand is positioned for the PA projection
Hand open fingers extended with palmar surface in contact with ir fingers moderately separated
What is the CR centering point for the PA projection of the hand
Perpendicular to the 3rd MCP JOINT
What is the amount of lateral rotation needed to achieve a Pa oblique projection of the hand
Coronal plane of the hand forms 45 degree angle with Ir
Describe the positioning details for the PA oblique projection of the fourth finger
From the PA , hand is rotated lateral to place anteromedial (palmar/ulnar) surface in contact with the IR. Coronal plane of fingers at 45 degree angle to IR. Fingers are suppported by stair step sponge
Why is the PA projection not the routine projection for the thumb
The resulting image will have less detail that the AP projection image because the increased OID results in greater magnification distortion
Describe positioning details for the PA projection of the wrist
Anterior surface of wrist is in contact with ir. Fingers are flexed go form loose fist, placing wrist in close contact with IR and opening inter carpal joints
What is the CR centering point for the PA projection of the wrist
Perpendicular to the midcarpal area
Describe the positioning detail for lateral projection of wrist
Medial surface of the wrist is in contact with Ir. Coronal plane of wrist is perpendicular to ir