TOPIC : POSITRON EMISSION TOMOGRAPHY AND FUSION IMAGING 🌟 IMPORTANT POINTS TO REMEMBER 🔹Principle Of PET: It relies on positron-emitting radionuclides generated in cyclotrons. FDG is a glucose analogue that enters the cell using the same uptake mechanism as normal glucose. Within the cell, FDG is phosphorylated by the enzyme hexokinase to 2-deoxyglucose-6-phosphate. 🔹Annihilation Radiation: […]
TOPIC: THERMOGRAPHY 🌟 IMPORTANT POINTS TO REMEMBER 🔹Thermography is based on the ability to image the heat emission of the human body. It is a non-invasive objective, non-radiative tool that uses the heat from the body to diagnose the causes of a host of health-care conditions. 🔹Principles Of Thermography: All objects, including the human body […]
TOPIC: NUCLEAR MEDICINE 🌟 IMPORTANT POINTS TO REMEMBER 🔹Radionuclide: Unstable nuclei, having excess or a deficit neutron, are radioactive and transform spontaneously (or decay) until they become stable nuclei, by emitting alpha, beta and gamma radiations in any combination. 🔹Production Of Radionuclide: It is done in the following ways: nuclear reactor, neutron deficit, cyclotron, nuclear […]
TOPIC: ULTRASONOGRAPHY 🌟IMPORTANT POINTS TO REMEMBER 🔹USG: It is also defined as the study of tissues of the human body with the utilisation of reflections (echoes) of high-frequency sound waves (USs) which are introduced on the body surface, in the area under examination, by a device called ‘a transducer’. The word ‘sonography’ means imaging with […]
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.
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 […]
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