Introduction to Radiology - PDF

Christian M. Introduction to Radiology Beltran, DDM Objectives: ❖ Summarize the basic concepts of oral radiolog ❖ Enumerate and explain the four main sections of radiology ❖ Differentiate radiopaque from radiolucent BELTRAN, C.M....

Christian M. Introduction to Radiology Beltran, DDM Objectives: ❖ Summarize the basic concepts of oral radiolog ❖ Enumerate and explain the four main sections of radiology ❖ Differentiate radiopaque from radiolucent BELTRAN, C.M. y.  Introduction to Radiology Roentgenology ❖ Studies technique and interpretation BELTRAN, C.M.  Introduction to Radiology 4 Main Sections of Radiology ❖ Basic Physics and equipmen ❖ Radiation and Protectio ❖ Oral Radiograph ❖ Oral Radiology BELTRAN, C.M. y n t  Introduction to Radiology Basic Physics and Equipment ❖ Production of x ray ❖ Properties and interactions which result in the formation of the radiographic image BELTRAN, C.M. s  Introduction to Radiology Radiation and Protection ❖ Have good diagnosis value but have harmful effect ❖ Radiation biology- how cells of the body react to radiation BELTRAN, C.M. s  Introduction to Radiology Oral Radiography ❖ Techniques involved in producing the various radiographic images ❖ Intraora ❖ Extraoral BELTRAN, C.M. : l  Introduction to Radiology Oral Radiology ❖ The interpretation of radiographic image ❖ How to properly describe the lesions ❖ Almost all aspects of dentistry shall entail a little amount of radiology diagnostic aid and treatment. BELTRAN, C.M. s  Introduction to Radiology Almost all aspects of dentistry shall entail a little amount of radiology diagnostic aid and treatment. BELTRAN, C.M. Introduction to Radiology BELTRAN, C.M.  Introduction to Radiology s ❖ Restorative Dentistr - Diagnosis of carie ❖ Endodontic - Diagnosis and treatment prope ❖ Oral Surger - Diagnosis of disease, teeth, and jaws BELTRAN, C.M. s y s y r  Introduction to Radiology Radiographic Shadows ❖ The amount the x-ray beam is attenuated by an object determines the radiodensity of the shadows ❖ Can penetrate objects, high EMR ❖ X-ray discovered by Wilhelm Conrad Roentgen ❖ It passes through the object and then hit the lm ❖ Radiographic shadows depend on the number of x-rays reaching lm and also the density of the object BELTRAN, C.M. fi fi  Introduction to Radiology Radiographic Shadows ❖ Radiopaque- white shadow - dens ❖ Radiolucent- black shadow - not so dense BELTRAN, C.M. e s s Introduction to Radiology BELTRAN, C.M. Introduction to Radiology BELTRAN, C.M. Introduction to Radiology BELTRAN, C.M.  Introduction to Radiology Shadow density is affected by: ❖ Type of materia ❖ Thickness of density of materia ❖ Shape of objec ❖ Intensity of x-ray beam BELTRAN, C.M. t l l  Introduction to Radiology Density ❖ In radiography, it is de ned as the degree of darkness of l ❖ More x-rays reaching the lm, darke ❖ Depends on ❖ Position of object in relation to the x-ray beam and l ❖ Sensitivity of the lm BELTRAN, C.M. fi fi m m : fi fi fi r  Introduction to Radiology Effect of composition ❖ Metal - radiopaqu ❖ Plastic - radiolucent BELTRAN, C.M. e  Introduction to Radiology Effect of different thickness/densities BELTRAN, C.M. Introduction to Radiology BELTRAN, C.M.  Introduction to Radiology Radiographs ❖ 2D representation of 3d object ❖ 2d images have limited informations BELTRAN, C.M. s  Introduction to Radiology Is the radiograph alone, sufficient enough to arrive at your diagnosis? BELTRAN, C.M.  Introduction to Radiology Clarity of radiographic image ❖ Contrast - Usual difference between the various black, white and grey shadow ❖ Image quality - De nition, geometric accuracy and detail of the nal image. BELTRAN, C.M. fi fi s Thank you!  Reference: ❖ Mallya S. and Lam, E. (2018). White and Pharoah’s Oral Radiology Principles and Interpretation. (8th ed.). Missouri: Mosby Elsevier Inc. ❖ Thomson, E. Johnson, O. (2012). Essentials of Dental Radiography for Dental Assistants and Hygienists (9th Edition). Pearson Education Inc. BELTRAN, C.M.