Term
| What is the newest modality in diagnostic imaging? |
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Definition
| PET - Positron Emission Tomography |
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Term
| What modality uses high-frequency sound waves produced by electrical stimulation of a specialized crystal. When the high frequency sound waves pass through the body, their intensity is reduced by different amounts depending on the acoustic properties of the tissues through which they travel. |
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Definition
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Term
| In US, what is a tissue or structure described as if it is echo free, or lacking a signal. It transmits sound waves easily and appears as the dark region on the image (usually fluid filled)? |
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Definition
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Term
| In US, the terms _________ and _________ are used to make comparisons of echo intensities between adjacent (solid) structures. |
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Definition
| hyperechoic and hypoechoic |
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Term
| In US, the term ________ is used to describe two structures that have the same echogenicity even though the tissue may not be the same. |
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Definition
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Term
| What modality produces cross-sectional tomographic images by first scanning a slice of tissue from multiple angles with a narrow x-ray beam, then calculating a relative linear attenuation coefficient, and finally displaying the computed reconstruction as a gray-scale image on an imaging monitor. |
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Definition
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Term
| The __ ______, aka Hounsfield number, reflects the attenuation of a specific tissue relative to that of water, which is assigned the number 0 and appears gray on the image. The highest number 1,000 represents bone and appears white, and the lowest number -1,000 represents air and appears black. |
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Definition
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Term
| ______ CT allows reconstruction of images in three dimensions and can demonstrate vascular lesions without the need for arteriography. (Can also produce virtual colonoscopy and bronchoscopy images) |
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Definition
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Term
| ___ has become the modality of choice for imaging the central nervous system and spine. It is also the first choice for imaging most conditions of the musculoskeletal system, and it is a problem solver in the abdomen and pelvis. |
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Definition
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