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Questions and Answers
What is the recommended FFD for upper limb procedures to maximize image sharpness?
What is the recommended FFD for upper limb procedures to maximize image sharpness?
- 50-54″(127-137cm)
- 40-44″(102-113cm) (correct)
- 30-34″(76-86cm)
- 20-24″(51-61cm)
What is the recommended size for the cassette in a PA oblique fingers X-ray?
What is the recommended size for the cassette in a PA oblique fingers X-ray?
- 12 x 12cm L.W.
- 10 x 15cm L.W.
- 24 x 30cm L.W.
- 18 x 24cm L.W. (correct)
What is the most effective practice for preventing unnecessary radiation exposure to the patient during upper limb examinations?
What is the most effective practice for preventing unnecessary radiation exposure to the patient during upper limb examinations?
- Longer exposure time
- Close collimation (correct)
- Increased OID
- (Grid use with digital systems)
What is the recommended position for a patient undergoing a hand PA fingers X-ray?
What is the recommended position for a patient undergoing a hand PA fingers X-ray?
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What type of screens are recommended for digital imaging in upper limb procedures?
What type of screens are recommended for digital imaging in upper limb procedures?
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Study Notes
Image Quality and Radiation Exposure
- For upper limb procedures, a Focus-to-Film Distance (FFD) of 100 cm is recommended to maximize image sharpness.
Cassette Size and Orientation
- A cassette size of 18 cm x 24 cm is recommended for a PA oblique fingers X-ray.
Radiation Safety
- The most effective practice for preventing unnecessary radiation exposure to the patient during upper limb examinations is to collimate the X-ray beam to the area of interest.
Patient Positioning
- For a patient undergoing a hand PA fingers X-ray, the recommended position is with the fingers extended and the hand flat on the cassette, with the fingers separated and the palmar surface facing downwards.
Digital Imaging
- For digital imaging in upper limb procedures, high-resolution screens with a resolution of at least 4 lp/mm are recommended.
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