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NEET MDS Quiz - Practice Test

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Radiology - 3 Questions

1
Radiology
Reflecting layer used in intensifying screens
1) Calcium tungstate
2) Titanium oxide & magnesium carbonate
3) Gaddinium oxysulphide
4) Lanthanum oxybromide

📠Explanation:

The reflecting layer in intensifying screens is made of titanium oxide and magnesium carbonate. This layer reflects light back toward the film, increasing the efficiency of the screen by ensuring that light photons traveling away from the film are redirected back to contribute to image formation.

2
Radiology
Objects which cause attenuation of X-ray beam are shown as............in image 
1. Radiolucent
2. Radiopaque
3. Gray
4. None of the above

📠Explanation:

Objects which cause attenuation of X-ray beam are shown as radiopaque in an image.

Radiopaque materials absorb or block X-rays, leading to a reduced transmission of the X-ray beam. This results in the appearance of white areas or shadows on the X-ray image, indicating the presence of dense structures like bone, metal restorations, or calculi. Radiolucent structures, on the other hand, allow X-rays to pass through more freely, resulting in dark areas on the image.

3
Radiology
Best radiograph for viewing # of maxillary bone
1) Submentovertex
2) PA view
3) Waters view
4) Towne"s projection

📠Explanation:

Waters view is the best radiograph for viewing fractures of maxillary bone. It provides excellent visualization of the maxillary complex, including the maxillary sinuses, zygomaticomaxillary sutures, and orbital floors, which are commonly involved in maxillary fractures.

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