TOPIC : CONE-BEAM COMPUTED TOMOGRAPHY 🌟 IMPORTANT POINTS TO REMEMBER 🔹History: CBCT was first developed and described for use in angiography. In 1998, Mozzo et al. reported the first CBCT unit developed specifically for dental and maxillofacial use. 🔹Principle Of CBCT: CBCT is based on fixed X-ray source detector with a rotating gantry. A divergent […]
TOPIC: DIGITAL RADIOGRAPHY 🌟 IMPORTANT POINTS TO REMEMBER 🔸Digital radiography may be defined as a system for the acquisition, processing and display of radiographic images using modern data processing technology.🔸Components of a digital radiographic system: A digital radiographic system consists of a solid-state detector and storage phosphor plate.🔸Solid-state detectors: Solid-state detectors are made of semiconductors […]
TOPIC: MAGNETIC RESONANCE IMAGING 🌟 IMPORTANT POINTS TO REMEMBER 🔹It is formally called Nuclear Magnetic Resonance. 🔹Felix Bloch is called the father of MRI. 🔹Bloch proposed that the nucleus behaves like a small magnet as it spins on an imaging axis, and has an associated magnetic field. 🔹This field is called the magnetic […]
TOPIC: COMPUTED TOMOGRAPHY 🌟 IMPORTANT POINTS TO REMEMBER 🔹Tomography: The word tomography is derived from the Greek word ‘tomos’ meaning ‘a technique of X-ray photography by which a single plane is photographed with the outline of structures in other plane eliminated’. 🔹History: Allen McLeod Cormack proposed the theoretical idea of CT in 1950s and the […]
TOPIC: ORTHOPANTOMOGRAPHY 🌟 IMPORTANT POINTS TO REMEMBER 🔹Panoramic radiographic technique is also known as pantomography and rotational panoramic radiography. 🔹Indication: To evaluate overall health of maxillofacial structures, know exact location of third molar if it is horizontally impacted and cannot be seen on periapical radiography, and evaluate developmental anomalies. 🔹Advantages: It provides broad anatomical coverage […]
TOPIC: SKULL RADIOGRAPHY 🌟 IMPORTANT POINTS TO REMEMBER 🔹The cranium encloses and protects the brain and is made up of eight bones, two of which, the parietal and temporal, are paired. 🔹The technical requirements for extraoral imaging include a detector, a grid and equipment capable of a long source-to-film distance. 🔹Caudal difference: It is important […]
TOPIC: LATERAL OBLIQUE VIEW 🌟IMPORTANT POINTS TO REMEMBER 🔹 The lateral oblique view is one of the most enterprising and satisfactory techniques of having an extraoral view of the jaw. 🔹Size of the cassette used for the lateral oblique view is 5 × 7 in. 🔹The central rays of the beam are directed at –15° […]
TOPIC: UNDIAGNOSTIC RADIOGRAPHY 🌟IMPORTANT POINTS TO REMEMBER 🔹Lighter radiographs: Radiographs exposed for less than optimum time or with less than optimum kVp or exposed for optimum timing and kVp but underdeveloped, all will result in lighter radiographs or low-density radiographs. 🔹Prevention can be done by developing such films for a relatively longer time 🔹Darker films: […]
TOPIC: QUALITY CONTROL IN DENTAL RADIOGRAPHY 🌟 IMPORTANT POINTS TO REMEMBER 🔹Quality control: It is the specific measure for ensuring and verifying the quality of the radiograph taken. 🔹Quality assurance: The arrangement to ensure that the quality control procedures are effective, leading to relevant changes and improvement. 🔹Quality audit: It is the process of supervision […]
TOPIC: PRINCIPLE OF RADIOGRAPHIC INTERPRETATION 🌟IMPORTANT POINTS TO REMEMBER 🔹Radiographic interpretation is based on the visualisation and analysis of opacities on a radiograph. 🔹The difference between those X-rays absorbed by the body part and those that penetrate it is known as differential absorption. 🔹The greater the tissue absorption, the fewer X-ray photons reach the film, […]