Ch 28 DMS EXAM QUESTIONS WITH COMPLETE
SOLUTIONS
acoustic impedance Correct Answers resistance of sound as it
propagates through a medium
acoustic window Correct Answers ability of sonography to
visualize a particular area
anechoic Correct Answers property of being free of echoes or
without echos
angle of incidence Correct Answers angle at which the
ultrasound beam strikes an interface with respect to normal
(perpendicular) incidence
ankle/brachial index (ABI) Correct Answers ratio of ankle
pressure to brachial pressure to provide a general guide to help
determine the degree of disability of the lower extremity
attentuation Correct Answers weakening of the sound wave as it
propagates through a medium
axial resolution Correct Answers ability to distinguish two
structures along a path parallel to the sound beam
biparietal diameter (BPD) Correct Answers largest dimension
of the fetal head perpendicular to the midsagittal plane;
measured by ultrasonic visualization and used to measure fetal
development
, color-flow Doppler Correct Answers velocity in each direction
is quantified by allocating a pixel to each area; each velocity
frequency change is allocated a color
complex Correct Answers containing anechoic and echogenic
area
continuous wave ultrasound Correct Answers wave in which
cycles repeat indefinitely; consists of a separate transmit and
receive transducer housed within one assembly
coronal image plane Correct Answers anatomic term used to
describe a plane perpendicular to the sagittal and transverse
planes of the body
detail resolution Correct Answers includes axial and lateral
resolution
diagnostic medical sonography Correct Answers general term
that encompasses the abdominal, breast, cardiac, gynecologic,
obstetric, and vascular sonography
doppler effect Correct Answers shift in frequency or
wavelength, depending on the conditions of observation; caused
by relative motions among sources, receivers, and medium
doppler ulstrasound Correct Answers application of doppler
effect to ultrasound to detect movement of a reflecting boundary
relative to the source, resulting in a change of the wavelength of
the reflected wave
SOLUTIONS
acoustic impedance Correct Answers resistance of sound as it
propagates through a medium
acoustic window Correct Answers ability of sonography to
visualize a particular area
anechoic Correct Answers property of being free of echoes or
without echos
angle of incidence Correct Answers angle at which the
ultrasound beam strikes an interface with respect to normal
(perpendicular) incidence
ankle/brachial index (ABI) Correct Answers ratio of ankle
pressure to brachial pressure to provide a general guide to help
determine the degree of disability of the lower extremity
attentuation Correct Answers weakening of the sound wave as it
propagates through a medium
axial resolution Correct Answers ability to distinguish two
structures along a path parallel to the sound beam
biparietal diameter (BPD) Correct Answers largest dimension
of the fetal head perpendicular to the midsagittal plane;
measured by ultrasonic visualization and used to measure fetal
development
, color-flow Doppler Correct Answers velocity in each direction
is quantified by allocating a pixel to each area; each velocity
frequency change is allocated a color
complex Correct Answers containing anechoic and echogenic
area
continuous wave ultrasound Correct Answers wave in which
cycles repeat indefinitely; consists of a separate transmit and
receive transducer housed within one assembly
coronal image plane Correct Answers anatomic term used to
describe a plane perpendicular to the sagittal and transverse
planes of the body
detail resolution Correct Answers includes axial and lateral
resolution
diagnostic medical sonography Correct Answers general term
that encompasses the abdominal, breast, cardiac, gynecologic,
obstetric, and vascular sonography
doppler effect Correct Answers shift in frequency or
wavelength, depending on the conditions of observation; caused
by relative motions among sources, receivers, and medium
doppler ulstrasound Correct Answers application of doppler
effect to ultrasound to detect movement of a reflecting boundary
relative to the source, resulting in a change of the wavelength of
the reflected wave
