chapter 1 introduction Flashcards
Anechoic
portion of an image that appears echo-free
Echogenic
An organ or tissue that is capable of producing echoes by reflecting the acoustic beam
Echopenic
A structure that is less echogenic
Heterogeneous
Have several different echo characteristics
Homogeneous
Echoes of equal intensity
Hyperechoic
Echoes brighter than surrounding tissues
Hypoechoic
Not as bright as surrounding tissues
Isoechoic
equal echo density
Ipsilateral
Located on the same side of the body
Contralateral
Located on the opposite side of the body
This plane runs vertically through the body separating it into equal right and left halves
Sagittal
Divides the body into equal right and left halves
Midsagittal
This plane runs vertically through the body and divides the body into anterior and posterior portions
Coronal
Divide the body into superior and inferior portions
Transverse
When performing a neurosonography exam the top of the image represents which scanning surface
Superior
If a kidney stone is diagnosed with an abdominal sonogram but further testing reveals that the kidney is normal what is this result called
A false-positive result
If a kidney stone is diagnosed with an abdominal sonogram and further testing also finds a kidney stone what is this result called
A true positive result
If the abdominal sonogram appears normal but a CT exam reveals a mass in the liver what is this result called
A false-negative result
If the number of false-negative exams increase what happens to the sensitivity of the exam
The sensitivity will decrease
What term describes the ability of the exam to find diseases that are present and not find diseases that are not truly present
Accuracy
Defines how well an exam documents normal findings or excludes patients without disease
Specificity
Defines how well an exam documents what ever disease or pathology is present
Sensitivity
When scanning in the longitudinal , sagittal plane, where is the transducer indicator located in relation to the organ of interest
at the 12:00 position
When scanning in the transverse plane, where is the transducer indicator located in relation to the organ of interest?
At the 9:00 position
Exhibits both anechoic and echogenic areas on an image
Complex
Fluid filled structures, such as the gallbladder, urinary bladder, or simple cysts appear as
Anechoic
