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Rad 115 Exam 2
Part 1
| Question | Answer |
|---|---|
| Which position requires you to elevate and support the thumb? | PA Thumb |
| How do you increase magnification? | Minimize OID as much as possible |
| What position is known as the Navicular view? | PA Ulnar Deviation (Wrist X-Ray) |
| What position is known as the Stecher Method? | PA Axial (Wrist X-Ray) |
| What position is known as the Gaynor-Hart? | Tangential Carpal Canal |
| What is the purpose of a PA Ulnar Deviation (wrist) X-Ray? | To obtain the best view of trauma to the scaphoid bone |
| Why would you take a PA Ulnar Deviation X-Ray instead of a regular PA Wrist X-Ray? | Reduced superimposition of the Scaphoid bone |
| PA Ulnar Deviation Patient Positioning | Turn hand toward ulna as far as it will SAFELY go, without moving the forearm |
| How would you go about imaging trauma to the scaphoid bone when a patient cannot do ulnar deviation? | Perform a PA Axial X-Ray |
| PA Axial Patient Positioning | Use a sponge (appears long and narrow) to elevate the IR 20° Paitent must lay hand flat and centered on the IR |
| Include 1 inch beyond skin border and about 2 inches distal and proximal to the wrist joint ^this describes _________ collimation. | PA Ulnar Deviation |
| Include 1 inch beyond skin border and about 2.5 inches distal and proximal to the wrist joint ^this describes _________ collimation. | PA Axial and Tangential Carpal Canal |
| What is the best X-Ray for evaluating fractures of the pisiform, hamate and trapezium bones? | Tangential Carpal Canal (Gaynor-Hart) |
| How would you best describe CR placement required for a Tangential Carpal Canal X-Ray? | The Central Ray is angled 25-30° inferiorly to the long axis of the hand and centered 1 inch distally to the base of 3rd metacarpal |
| Patients wrist is placed in a neutral position on the IR, with the palm (hand) facing up (patient looks ready for a high-five) ^ This best describes? | Tangential Carpal Canal Patient Positioning |
| What situation requires a Trauma AP: Partial Flexion instead of a regular AP Elbow X-Ray? | When the patient cannot completely extend their elbow (into AP position) |
| The Central Ray is centered at the __________ when performing a Trauma AP: Partial Flexion X-Ray? | Elbow joint |
| Describe Proximal Forearm Patient Positioning | Elbow is bent and centered to the IR Forearm is placed flat along the IR |
| Describe Distal Humerus Patient Positioning | Elbow is bent and centered to the IR Humerus (upper arm) is placed flat along the IR Use a sponge to support and steady the patients forearm |
| The ___________ is used to obtain images of the coronoid process (MO) and the radial head (LO) from patients who cannot fully extend the elbow for AP oblique projections. | Coyle Method |
| Coyle – Radial Head Patient Positioning- | Patient seated with their Elbow centered on the IR, palm of the hand facing down, flexing (bending) their elbow at a 90° angle |
| Describe CR positioning required for Coyle – Radial Head? | CR angled 45° towards shoulder/radial head CR enters the joint at the mid-elbow |
| Coyle – Coronoid Process Patient Positioning- | Patient seated with their Elbow centered on the IR, palm facing down, while flexing (bending) their elbow at a 80° angle |
| Describe CR positioning required for Coyle – Coronoid Process | Angled 45° away from shoulder, entering the joint at mid-elbow |
| Coyle – Radial Head replaces the __________ Elbow X-Ray | Medial Oblique |
| Coyle – Coronoid Process replaces the __________ Elbow X-Ray | Lateral Oblique |
| What type of X-Ray requires separate images of both the Proximal Forearm and the Distal Humerus? | Elbow-Trauma AP: Partial Flexion |
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