NEET MDS Shorts
56692
RadiologyExplanation: In a Coolidge tube, the cathode is typically made of molybdenum, which has a high melting point and is effective for electron emission. The anode is usually made of copper, which has excellent thermal conductivity, allowing it to dissipate heat generated during x-ray production effectively.
80442
RadiologyTo localize a supernumerary or an impacted tooth and determine its exact relationship to the other teeth, the most effective radiographs would be two or more periapical views at different angles and an occlusal view.
76595
Radiology
Tomography is a diagnostic imaging method that is often referred to as basic
"sectional" or "slice" radiography. It involves taking a series of
two-dimensional images of a specific area or "slice" of the body, using a narrow
beam of radiation that passes through the body from multiple angles. These
images are then combined to create a detailed, cross-sectional view of the
internal structures, allowing for the visualization of the body without the
superimposition of structures outside the area of interest. This technique is
particularly useful for diagnosing conditions that may not be apparent on
standard X-rays.
Explanation of the other options:
1) Othopantomography: This is a type of panoramic radiography used to capture a
wide-angle view of the teeth, jaw, and other oral structures. While it does
produce an image of a "section" of the body, it is not typically referred to as
"sectional" or "slice" radiography in the same sense as tomography, as it does
not involve the same layering or cross-sectional approach.
2) Cephalogram: A cephalogram is a specific type of X-ray used in dentistry and
orthodontics to examine the soft tissues and bones of the face and head,
particularly the skull and jaw. It provides a two-dimensional, flat
representation of the head from the side view, and while it is a form of
radiography, it does not produce the layered or cross-sectional images that are
characteristic of tomography.
64811
RadiologyFor maintaining parallelism between the object and film, the film is placed at a distance to avoid distortion by increasing the target to object distance.
58829
RadiologyInterproximal caries is best detected by bitewing radiography.
91388
RadiologyIn radionuclide imaging, the most useful radiopharmaceutical for skeletal imaging is Technetium-99m linked to Methylene diphosphonate.
90582
RadiologyA consistent radiographic feature in Paget's disease is hypercementosis of tooth.
66472
RadiologyOrotic acid forms radiopaque stones, while Xanthine, Cysteine, and Allopurinol form radiolucent stones. Radiolucent stones are not visible on plain radiographs due to their composition being similar to soft tissue density. Orotic acid stones contain calcium and are therefore radiopaque.
94057
RadiologyLamina dura is the radiographic appearance of alveolar bone proper.
53760
RadiologyIn bone scintigraphy, all is guessed except none.