ALU 101 Exam with accurate detailed answers

ALU 101 Exam with accurate detailed answers ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||




Hounsfield Units - correct answer✔✔How the absorption of different tissues is quantified ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||




Fluoroscopy - correct answer✔✔allows physician to view moving parts of the body in real ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||




time (used for arthroscopy, cardiac catheterization, stent placement)
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Fine Needle Aspirate (FNA) - correct answer✔✔obtains cells and/or fluid for pathological
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dx

differentiates whether a cold nodule is benign/malignant ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||




A-Mode, B-Mode, M-Mode & Grayscale - correct answer✔✔provides info on structural
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size, motion or both
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creates moving image of heart including valve motion and wall motion
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Contrast Agents - correct answer✔✔allows better imaging for tubular/hollow structures
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can be used w/ plain x-ray, CT & MRI studies
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Doppler Ultrasonography - correct answer✔✔measures velocity & direction of blood flow
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within heart and blood vessels
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evaluates venous insufficiency, blood clots, arterial occlusion/stenosis, and identifies
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valvular disorders ||\\|//||




X-Rays - correct answer✔✔a beam of radiation is emitted and scattered/absorbed by
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different tissues (i.e. bone, fat, water, and air) ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||

, Advantages of US over MRI/CT Scanning - correct answer✔✔1. differentiates solid from ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||




liquid

2. lower cost
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3. portability
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4. accessibility
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5. no exposure from ionizing radiation
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Hyperechoic, Hypoechoic, Anechoic Tissues - correct answer✔✔1. large number of ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||




soundwaves

2. low number of soundwaves
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3. no soundwaves (fluid)
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Limitations to US - correct answer✔✔1. skill level of ultrasonographer ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||




2. image resolution
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3. "noise" produced when ultrasound waves hit gas & bone
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Nuclear Medicine - correct answer✔✔1. uses scintigraphy (gamma camera) to record
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radioactive material in target orgain ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||




2. images bone
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3. determines thyroid and hepatobiliary function
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3. can help dx CAD and view cardiac physiology
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Digital Radiography - correct answer✔✔1. Form of x-ray
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2. emits low dose of radiation
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3. allows radiologist to manipulate images for better visualization
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Computed Tomography (CT/CAT) - correct answer✔✔1. sees fat, air, soft tissue & bone ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//|| ||\\|//||