a wave that requires a medium through which to travel, cannot travel in a vacuum correct answer: mechanical wave
transducer that requires mechanical
... [Show More] focusing and steering. electrical focusing and steering is not possible correct answer: single element transducer
Multiple elements used to create an image by varying timing of the electrical pulses to different elements in the array correct answer: phased array
high frequency probes have ________ penetration and _________ resolution correct answer: low, high
Transducer contains a large number of rectangular piezoelectric elements arranged in a linear pattern correct answer: sector phased array
Combine sequenced linear array and phased array techniques to provide a trapezoidal imaging format correct answer: vector array
In a sector image, the number of scan lines per degree of the sector determines ______ correct answer: line density
increasing the line density will _______ # of pulses per frame, improve spatial resolution (axial and lateral), __________ frame rate and ___________ temporal resolution. increase/decrease? correct answer: increases, decreases, decreases
increasing sector angle will have _________ spatial resolution and ________ temporal resolution. degraded/improved? correct answer: improved, degraded
decreasing sector angle will _______ spatial resolution and ________ temporal resolution. degrade/improve correct answer: degrade, improve
list 2 types of spatial resolution correct answer: axial and lateral
Resolution with the ability to resolve two separate structures that lie perpendicular to the ultrasound beam correct answer: lateral resolution
Resolution with the ability to resolve two separate structures that lie parallel to the ultrasound beam correct answer: axial resolution
forms aorta and pulmonary artery correct answer: trunctus arteriosus
forms left ventricle correct answer: primitive ventricle
Forms the atria correct answer: sino-atrium
forms right ventricle and truncus arteriosus correct answer: bulbous cordis
forms the atrial septum, membranous ventricular septum, MV and TV correct answer: endocardial cushions
composed of 2 segments that will become SVC, IVC and atrial floor correct answer: sinus venosus
connects pulmonary trunk to aortic arch, majority of flow bypasses fetal lungs correct answer: ductus arteriosus
connects the umbilical vein to the inferior vena cava, bypassing the liver correct answer: ductus venosus
position of apex correct answer: inferior, anterior and leftward
position of base correct answer: superior, posterior and rightward
which AV valve is closer to the apex? correct answer: TV [Show Less]