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28 Cards in this Set
- Front
- Back
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X-rays were discovered in ____ by ____
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1895
Wilhelm Konrad Roentgen |
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This is almost like a video version of x-ray
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fluoroscopy
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CT stands for
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computed tomography
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Dexa is mainly used for
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bone density
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Traditional X-ray is called:
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plain film radiography
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Radiation attenuation is affected by:
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atomic number
thickness of material |
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Often times, plain film radiography is enhanced by:
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contrast media
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The most common contrast media is
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barium or iodine
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Pros and Cons of plain film radiography
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Pros
-inexpensive -fast -easily accessible Cons -poor sensitivity to early disease -poor imaging of soft tissues -exposure to ionizing radiation -possible allergic reaction to contrast media |
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Slices of body images is produced by:
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CT and MRI
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Pros and Cons of CT
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Pros
-excellent imaging of soft bone -improved soft tissue imaging -can produce images in all three planes -often best imaging option Cons -exposure to ionizing radiation (much more than traditional x-ray) -takes longer than x-ray -possible allergic reaction if contrast is used |
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A 3D image made by a computer from a CT scan is called:
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Spiral CT
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What type of imaging can be used to view metabolic activity of a patient
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Nuclear imaging
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In nuclear imaging, ____ is usually tagged with another substance to detect where in the body uptake will occur
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technetium (Tc99)
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In nuclear imaging, technetium (Tc99) is attached to ____ for bones
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Methylene Diphosphonate (MDP)
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Give two examples of nuclear imaging
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Bone scan
PET scan |
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Nuclear imaging pros and cons
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Pros
-extremely sensitive -provides physiologic information -possible early detection -can image entire body with one scan Cons -Not specific (tells you increase activity, but not why) -radiation exposure (low) -time consuming (require multiple visits) |
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Bone scan is (specific/not specific) and (sensitive/not sensitive)
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not specific
sensitive |
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Fused image is made from:
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CT and PET scan
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Ultrasound are used to view:
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soft tissue
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Cholelithiasis (gall stones) can be seen with:
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ultrasound
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Ultrasound pros and cons
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Pros
-inexpensive -non-invasive -real time Cons -does not image gas or bone |
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MRI uses strong magnetic fields and radiofrequencies to manipulate _____
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hydrogen protons
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What are the two imaging techniques that does not include ionizing radiation
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Ultrasound
MRI |
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T1 vs T2 MRI images
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T1 - for fat
T2 - fluid (WW2 - water is white on T2) |
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MRI pros and cons
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Pros
-Unparalleled soft tissue imaging -Like CT, can produce axial, sagittal, and coronal slices -Can be used with or without contrast media -No ionizing radiation Cons -expensive -noisy and claustrophobic -poor imaging of bone |
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MRI usually used for:
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Neurologic exam (brain/spinal cord)
Musculoskeletal system (joints, muscles, ligaments, tendons) |
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CT usually used for:
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chest, abdomen, pelvis, head trauma
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