TOPIC: PRINCIPLE OF PROJECTION 🌟 IMPORTANT POINTS TO REMEMBER 🔹Image sharpness: It is the degree with which how well a boundary between two differing radiodensities is delineated. 🔹Image resolution: It is the degree with which how well a radiograph records separate objects that are close together.
IMAGE CHARACTERISTICS 🌟IMPORTANT POINTS TO REMEMBER 🔹Density: It is also called photographic density. It is the term used for describing the degree of film blackening and is measured by densitometer. In diagnostic radiology, the range of optical density is 0.3–2. 🔹Radiolucent areas: The white areas on the radiographic film🔹Radiopaque areas: The black areas on the […]
TOPIC: OCCLUSAL RADIOGRAPHY 🌟 IMPORTANT POINTS TO REMEMBER 🔹It is also called as called ‘sandwich radiography’. Occlusal radiographs are made using an extreme bisecting angle technique in which the primary beam is directed perpendicular to the imaginary bisector of angle formed between long axis of the tooth and long axis of the film. 🔹Mandibular cross-sectional view: […]
TOPIC: PATIENT MANAGEMENT IN DENTAL RADIOLOGY 🌟 IMPORTANT POINTS TO REMEMBER 🔺Dental radiographers must understand the importance of dental radiographs and their use in the management of the patients. 🔺He or she can be a dental assistant, dental hygienist or dental auxiliary. 🔺Proper dental radiograph is helpful to the dentist for detecting the pathology […]
TOPIC: BITEWING RADIOGRAPHY 🌟IMPORTANT POINTS TO REMEMBER 🔹Position of bite: The tab or bite platform should be positioned in the middle of the film packet and parallel to the upper and lower edges of the film packet. 🔹Position of film packet: The film packet should be positioned with its long axis horizontally for horizontal bitewing […]
PARALLEL LINE ANGLE TECHNIQUE 🌟 IMPORTANT POINTS TO REMEMBER 🔹Parallel line angle technique is also called Fitzgerald technique, long cone technique and extended cone technique. 🔹The central ray of the X-ray beam should be perpendicular to the film and the long axis of the tooth. The film should be placed in the mouth parallel to […]
TOPIC: BISECTING LINE ANGLE TECHNIQUE 🌟 IMPORTANT POINTS TO REMEMBER 🔹Bisecting line angle technique is also called short cone technique. 🔹Cieszynski rule: This rule states that two triangles are equal when they share one common side and have two equal angles. The central ray of the X-ray beam and the imaginary bisector result in formation […]
INTRAORAL RADIOGRAPHY: GENERAL CONSIDERATIONS 🌟 IMPORTANT POINTS TO REMEMBER 🔹Types of intraoral radiography: Periapical Radiography, Bitewing Radiography, Occlusal Radiography 🔹Head position: The chair should be raised high enough so that the occlusal surfaces of the maxillary arch can be visible while taking maxillary views. 🔹Occlusal plane: This should be parallel to the floor.
TOPIC: RADIATION HAZARDS 🌟IMPORTANT POINTS TO REMEMBER 🔹Biological effects: Can be somatic (stochastic effect, deterministic effect) or genetic. The effect can be also acute or immediate effect and chronic or long-term effect. 🔹Immediate effects of radiation are dermatitis, brittleness of the fingernail, epilation and leukopenia. 🔹Chronic or long-term effect: Repeated low levels of radiation exposure […]
TOPIC: RADIATION PROTECTION 🌟 IMPORTANT POINTS TO REMEMBER 🔹Natural radiation: It yields an average annual dose of about 0.79 mSv. It has three components: cosmic radiation, terrestrial radiation and internal sources. 🔹Cosmic radiation: It includes both energetic subatomic particles and photons of extraterrestrial origin that reach the earth.
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