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Contrast RADIOGRAPHIC IMAGING

 Contrast RADIOGRAPHIC IMAGING A high overall radiographic density or a low overall radiographic density also holds true for contrast an image can offer only little differences in density between different structures and be known as a low contrast image on the other hand a great difference in density between different structures can exist and this is known as a high contrast image the reason why a low contrast image gives little difference in densities is because there are so many densities present on a low contrast image ranging from light to dark this long range of densities gives the low contrast image the term long-scale contrast, on the other hand, a great difference in densities exists on a high contrast image because only a few densities are recorded on these images this is why high contrast images are also known as short-scale contrast images it might be tempting to assume that high contrast radiographic images are good and low contrast images are bad.   A high contras...
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Instrumentation of Fluoroscopy

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Instrumentation of Fluoroscopy  The components of this fluoroscopic imaging chain from this illustration you can see has a generator x-ray tube collimator filtration a table for the patient and the patient grid image intensifier optical coupling video camera and a monitor finally to visualize the image let's go step by step on this fluoroscopic imaging chain the x-ray generator the work of the accelerate generator is to enable selection of kilovolt edge and tube current that is Kaylyn MA for the accelerator the kV Mme can be altered using automatic brightness control it's called ABC now why do we need an automatic brightness control it maintains the overall image brightness at a constant level as the imagined inspire is panned across different parts of the body next, we move on to the x-ray tube requires high tube loading for extended views because fluoroscopy is a continuous process it's not like the exposures which are taken in routine radiography it can have a grid contr...
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Advanced Abdominal Ultrasound

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Ultrasound criteria of appendix ultrasound  >6mm Noncompressible structure  Pain with transducer pressure Presence of free fluid Signs of obstruction  The criteria again are going to be an appendix that's enlarged greater than 6 millimeters it is a non-compressible structure the people will have pain with transducer pressure there may be the presence of free fluid and there may be signs of obstruction or ileus so the way that we scan. we can use the linear probe if the patient size allows us and we can start by mowing the lawn at the edge of the liver or we can start down by the iliac crest if we start at the edge of the liver we're going to look for the gas in the colon as seen in this scan right here and we will follow that down until we see a tubular noncompressible structure and here we also see hyperechoic fat suggesting inflammation or stranding around the appendix just deep to the appendix we will see in this clip the iliopsoas muscle right here you can see the ...
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