Podcast
Questions and Answers
What is the correct positioning of the lateral aspect of the thumb for a standard view radiography?
What is the correct positioning of the lateral aspect of the thumb for a standard view radiography?
In a digital radiography of fingers, what should be centered for the direct projection (DP) view?
In a digital radiography of fingers, what should be centered for the direct projection (DP) view?
What is crucial to ensure when performing lateral imaging of the little finger?
What is crucial to ensure when performing lateral imaging of the little finger?
What field of view (FOV) should be included when imaging the lateral projection of fingers?
What field of view (FOV) should be included when imaging the lateral projection of fingers?
Signup and view all the answers
What is the positioning requirement for the fingers when taking a direct projection (DP) view?
What is the positioning requirement for the fingers when taking a direct projection (DP) view?
Signup and view all the answers
What is the primary beam centering point for the Dorsi-Palmer view of the hand?
What is the primary beam centering point for the Dorsi-Palmer view of the hand?
Signup and view all the answers
Which positioning is used for the Lateral hand view?
Which positioning is used for the Lateral hand view?
Signup and view all the answers
What is the purpose of the Lateral hand radiograph in trauma cases?
What is the purpose of the Lateral hand radiograph in trauma cases?
Signup and view all the answers
For the Dorsi-Palmer Oblique view, how should the hand be positioned?
For the Dorsi-Palmer Oblique view, how should the hand be positioned?
Signup and view all the answers
What is included in the field of view for the Dorsi-Palmer view?
What is included in the field of view for the Dorsi-Palmer view?
Signup and view all the answers
In Dorsi-Palmer positioning, how should the fingers be arranged?
In Dorsi-Palmer positioning, how should the fingers be arranged?
Signup and view all the answers
What aspect of the hand should be in contact with the image receptor in the Dorsi-Palmer view?
What aspect of the hand should be in contact with the image receptor in the Dorsi-Palmer view?
Signup and view all the answers
What is the recommended angle for the primary beam when centering over the Dorsi-Palmer Oblique view?
What is the recommended angle for the primary beam when centering over the Dorsi-Palmer Oblique view?
Signup and view all the answers
What is the correct positioning of the arm during the Dorsi-palmer (DP) projection of the wrist?
What is the correct positioning of the arm during the Dorsi-palmer (DP) projection of the wrist?
Signup and view all the answers
In a lateral wrist view, how is the forearm positioned?
In a lateral wrist view, how is the forearm positioned?
Signup and view all the answers
What does the ulnar deviation of the wrist help to visualize?
What does the ulnar deviation of the wrist help to visualize?
Signup and view all the answers
During an anterior oblique wrist projection, how much should the hand be rotated?
During an anterior oblique wrist projection, how much should the hand be rotated?
Signup and view all the answers
Which area should be centered during the lateral wrist imaging?
Which area should be centered during the lateral wrist imaging?
Signup and view all the answers
What is included in the field of view for a standard Dorsi-palmer wrist view?
What is included in the field of view for a standard Dorsi-palmer wrist view?
Signup and view all the answers
For effective soft tissue visual assessment, what should be ensured during wrist imaging?
For effective soft tissue visual assessment, what should be ensured during wrist imaging?
Signup and view all the answers
What type of projection includes a 30-degree cranial angle to visualize the scaphoid?
What type of projection includes a 30-degree cranial angle to visualize the scaphoid?
Signup and view all the answers
Study Notes
Radiographic Technique - Hand
- Radiographs of the hand require careful patient positioning and technique to ensure clear images.
- The relationship between the patient, image receptor, and primary beam must be considered, along with hand position, field of view, centering point, and the primary beam.
- Standard views include Dorsi-Palmer (DP) and Dorsi-Palmer Oblique (DP Oblique).
Dorsi-Palmer View (DP)
- Forearm positioned on the same plane, and pronated.
- Palmer aspect of the hand in contact with the image receptor (IR).
- Fingers are slightly separated.
- Radial and ulna styloid processes equidistant from the IR
- Vertical central beam is centered at the head of the 3rd metacarpal.
- The field of view includes soft-tissue of the distal phalanges, distal ends of radius and ulna and soft tissues laterally.
Dorsi-Palmer Oblique (DP Oblique)
- Hand externally rotated 45 degrees.
- Fingers slightly separated.
- Primary beam centered over the 5th metacarpal and angled to the 3rd metacarpal.
- The field of view includes the soft tissue of distal phalanges, distal radius and ulna and soft tissues laterally..
Lateral Hand
- Hand externally rotated 90 degrees from the DP position.
- Fingers extended and thumb abducted.
- Radial and ulna styloid processes are superimposed.
- Vertical central beam is centered at the head of the 2nd metacarpal.
- Soft tissue of distal phalanges, distal radius and ulna and soft tissues posterior aspect of hand and thumb are included in the field of view.
- Used to determine displacement and position of fracture fragments in trauma or foreign bodies.
Wrist Technique - DP/PA
- Arm is pronated.
- Radial and ulna styloid processes are equidistant from the IR.
- Fingers flexed.
- Vertical primary beam centered midway between radial and ulna styloid processes.
- Field of view includes distal 1/3 of the radius and ulna, and heads of metacarpals.
Lateral Wrist
- Forearm externally rotated into the lateral position.
- Radial and ulna styloid processes superimposed.
- Vertical central beam centered on the radial styloid process.
- Thumb abducted.
- View includes heads of metacarpals, distal 1/3 radius and ulna, and soft tissues.
Scaphoid View
- Various protocols exist between imaging centers, so the specific protocol for a scaphoid view should be determined.
- Views include PA 30-degree cranial, lateral, anterior oblique, or both.
- Ensure familiarity with specific hospital protocols.
DP Ulna Deviation (15 degrees)
- Ulna deviation elongates the scaphoid, showing it without superimposition of the radius.
- Forearm pronated, with elbow and shoulder on the same plane.
- Patient performs ulna deviation.
- Vertical central beam centered between radial and ulna styloid processes.
- Field of view includes distal radius and ulna, proximal metacarpals, and soft tissues.
Anterior Oblique View
- Rotating the hand and wrist 45 degrees from the PA position.
- Wrist has ulna deviation.
- Vertical central beam centered midway between the radial and ulna styloid processes.
- Field of view includes distal ends of the radius and ulna, proximal metacarpals, and surrounding soft tissues.
PA 30-degree Cranial Angle
- Wrist, hand, and forearm positioned in a PA (posteroanterior) position.
- Arm abducted.
- Hand with ulna deviation.
- 30 degree angle from the long-axis of the scaphoid applied to the x-ray tube.
AP Oblique/Posterior Oblique - Ulna Deviation
- Hand, wrist, and arm are supinated (rotated internally), for visualizing posterior aspect of the hand 45 degrees for the image receptor.
- Vertical central beam placed midway between the radial and ulna styloid processes.
- Foam pads may be used for patient support.
Thumb - AP
- Patient seated with arm externally rotated at the shoulder.
- 1st metacarpal parallel to the IR.
- No other fingers overlaying the palm.
- Vertical central beam centered on the 1st metacarpo-phalangeal joint.
- Image should include the 1st carpo-metacarpal and soft tissue distal to the phalanx.
Thumb - Erect AP
- Patient positioning using an erect wall stand.
- Ensuring the 1st metacarpal is parallel with the IR.
- Be mindful that the patient may struggle to keep still.
Lateral Thumb
- Internally rotate the hand from a DP position, placing the thumb laterally.
- Palms of the hand raised slightly for support, if needed.
- Lateral aspect of the thumb parallel to the IR.
- Vertical central beam centered on the 1st carpo-metacarpal joint.
Fingers (DP)
- Patient seated adjacent to the table with; hand, wrist, and forearm in the same plane.
- Finger of interests in the center of the IR.
- Phalanges positioned parallel to the IR.
- Vertical central beam is centered on the proximal interphalangeal joint (PIP).
- Soft tissue of the distal phalanx, distal one-third of the metacarpal, adjacent fingers, and lateral soft tissue are included in the FOV.
Lateral Fingers (Little/Ring/Middle/Index Fingers)
- Patient's hand externally rotated.
- Affected finger extended, other fingers flexed.
- Pad the hand as needed to separate the affected finger.
- Vertical central beam centered on the proximal interphalangeal joint (PIP).
- Distal 1/3 metacarpal and soft tissues are included in the FOV.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers essential radiographic techniques for imaging the hand, focusing on patient positioning and the Dorsi-Palmer views. It details the correct setup for clear radiographs, including specific anatomical landmarks and beam alignment. Knowledge of these techniques is crucial for obtaining accurate and diagnostic hand images.
