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Elastography Principle Physicians have long used the technique of palpation in the clinical setting. The underlying principle of palpation lies in the ability to feel stiffer tissue in the background of softer tissue when pressed (palpated). Ultrasound brings this concept…
Tissue Harmonic Imaging Technical Aspects Fundamental frequency is the original frequency of the acoustic beam emitted from the transducer. Harmonic wave generation is an acoustic phenomenon. Harmonic waves are integer multiples of the fundamental frequency. The second harmonic (twice the…
Ultrasonography is low in cost, noninvasive, and highly portable, and it allows real-time imaging in multiple operator-controlled planes. As a result, it is the most widely used cross-sectional imaging modality worldwide. The principal challenge with ultrasonography is greater user-dependence than…
Fluoroscopy is a type of imaging technique in which real-time movements of body organs and radiopaque contrast material are visualized. During a fluoroscopic examination, the operator or radiologist controls the functions of radiography equipment and x-ray tubes for real-time imaging…
Technical Aspects A plain abdominal radiograph must be read with a complete knowledge of the clinical situation. The patient's history and results of the physical examination and laboratory studies are always important to evaluate an acute abdomen, which may be…
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