CONTRAST AGENTS 🌟IMPORTANT POINTS TO REMEMBER 🔹Definition: Contrast agents is defined as radiopaque substances that have been developed to alter artificially the density of different parts of the patient, thus altering the subject contrast. 🔹Requirement of Contrast Media: The contrast media should be adequately radiopaque to show good contrast. They should be viscous enough that […]
OUTDATED SPECIALISED TECHNIQUES 🌟 IMPORTANT POINTS TO REMEMBER 🔹Conventional Tomography is the process by which an image of layer within the body is produced while images of structures lying above and below that layer are made invisible by blurring. It is also called body section radiography. 🔹There are two types of basic design used in […]
IMAGE-GUIDED THERAPY 🌟IMPORTANT POINTS TO REMEMBER 🔸VR: VR is based on computer graphics and special CAD planning and animation software for the creation of a computerised environment (or cyberspace) using the 3D image data of the patient. 🔸Medical RP: Medical RP is a technique for the manufacture of dimensionally accurate physical models of human anatomy […]
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 […]
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