RADD 2711 Class Notes - Exam 1 Review

RADD 2711 Class Notes - Exam 1 Review - SKELETAL RADIOLOGY...

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SKELETAL RADIOLOGY A EXAM 1 PERSONEL IN RADIOLOGY Certified Radiology Technician – trained in radiology technology. Minimum 2 years technical training. Their primary responsibility is x-ray production and have no responsibility for diagnostic interpretation. General Practitioner – primary professional degree individuals (MD, DC, DO, DDS, DPM) who are granted state statute the ability to utilize ionoizing radiation for diagnostic purposes. Can provide the technical component (take x-ray) as well as the ability to diagnose from the radiograph. They carry the liability for diagnostic interpretation. Radiologist – general practitioner who also does a residency of 3-4 years in radiology. Can provide the technical component, but their primary responsibility is the interpret the x-ray and reach a diagnostic conclusion and carry the liability for providing that service. A higher level of function than a general practitioner. INTRODUCTION There are 206 bones in the body, 126 in the appendicular skeleton and 80 in the axial skeleton. Bone is a connective tissue that supports mechanical loads, protects vital organs, contributes to mineral homeostasis, and serves as a site for hemopoiesis and immunogenesis. SKELETAL DEVELOPMENT o Bone is derived from mesodermal tissue o The 1 st bone to begin ossification is the clavicle o Intramembranous Ossification – a model is formed from condensed mesenchymal cells that differentiate into fibroblasts that produce collagen and osteoblasts that produce bone. Bone is formed in this fibrous membrane. There is no preformed stage of cartilage. Bones formed by this process include the parietal, squamous, and tympanic parts of the temporal bones, upper occipital squamosa, vomer, medial pterygoid, and upper face. The clavicles and mandibles are also membranous bones but they later develop secondary cartilaginous centers. The width of bone is controlled by this method as a result of the activity of the periosteum (appositional bone growth). o Endochondral Ossification – ossification that occurs within cartilage, there are 2 forms.
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Primary Endochondral Ossification – during embryonic development from a condensed mesenchymal model, cartilage cells (chonroblasts and chondrocytes) form and produce a cartilage cast of the definitive bone. This cartilage template is transformed into bone as peripheral capillaries penetrate and induce the formation osteoblasts. The peripheral collar of new bone then extends bidirectionally along the long axis of the bone. The outer perichonral envelope becomes the periosteum, which retains the ability either to resorb or to produce bone by intramembranous ossification and is responsible for the maintenance of cortical thickness. Secondary Endochondral Ossification – a similar but separate process that
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This note was uploaded on 11/23/2011 for the course RADD 2711 taught by Professor Melissaloschiavo during the Winter '11 term at Life Chiropractic College West.

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RADD 2711 Class Notes - Exam 1 Review - SKELETAL RADIOLOGY...

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