Understanding Ultrasound Exam Bundle (Complete Solutions)

Mechanical Transducer - ANSWER-- Disc shaped - One active element - Fan or sector shaped - Crystal moves with motor - Steered mechanically - Fixed focusing - No image when PZT is damaged What is the channel a combination of? - ANSWER-Combination of the active element, wire, and system elec...

Axial Resolution - ANSWER-Measures the ability of a system to display two structures that are very close together when the structures are PARALLEL to the sound beam's main axis. Resolution - ANSWER-The ability to create accurate images Axial Resolution - ANSWER-What answers the question, what...

Five terms describe the shape and regions of a sound beam: - ANSWER-1. focus 2. near zone length zone or near zone length 4. far zone 5. focal zone focal point - ANSWER-The location where the beam is the narrowest Near Zone (Fresnel Zone) - ANSWER-the region or zone in between the transdu...

_____________ Is the ability to create accurate images. - ANSWER-Resolution T/F Axial Res. is the ability to distinctly identify 2 structures that are very close together side by side. - ANSWER-False _______________________ measures the ability of a system to display 2 structures that are ve...

parameters that describe both pulsed and continuous waves (pg. 64) - ANSWER-Period, Wavelength, Frequency, Propagation Speed for pulsed wave, these parameters are all determined by the source/ system a. SPL, PD, PRP, DF b. PD, PRP, PRF, DF - ANSWER-b. PD, PRP, PRF, DF which parameters...

sound waves weaken, or ________, as they travel through the body. - ANSWER-attenuate amplified - ANSWER-strengthened deibel notation - ANSWER-standard measurement tool used to report the strength of the wave A number that represents the number of 10s that are multiplied to create the origin...

Go-Return Time or Time-of-Flight - ANSWER-The elapsed TIME from pulse CREATION to pulse RECEPTION Relationship between TIME-OF-FLIGHT and DEPTH (distance) - ANSWER-DIRECTLY RELATED: As depth increases the time it takes from when that pulse is created to when that pulse is received, increases ...

Which imaging modality places time of flight information on the X axis and echo amplitude on the Y axis? A. M mode B. L mode C. J mode D. A mode - ANSWER-D. A mode A mode, or amplitude mode, displays reflector depth on the X axis. Reflector depth is determined by a pulses time of flight. Th...

A video display that is limited to black and white only, with no shades of Gray, is called _______. A. binary B. bistable C. monochrome D. inchworm - ANSWER-B. bistable A video display with the ability to show black and white only, without any intermediate shades of Gray, is called bistable...

What is the ability of the system to create numerous frames each second? - ANSWER-Frame rate How is frame rate determined? - ANSWER-Sounds speed in the medium, depth of imaging What unit is frame rate measured in? - ANSWER-Hertz What does "accuracy in time" (the ability to precisely posit...

Contrast - ANSWER-Determines the range of brilliance in an image Brightness - ANSWER-Determines the brilliance of an image Scan Converter - ANSWER-converts/translates the information from spoke (fan shaped) format to video format (horizontal lines) Analog Numbers - ANSWER-* Real world * Un...

Directly related means - ANSWER-When one item increases or decreases, the second item, responds the same direction Two quantities are directly proportional if an increase in one quality leads to a/an ___________ in the other. - ANSWER-Increase Proportionally related means - ANSWER-Two items ar...

harmonic frequency? - ANSWER-twice the fundamental frequency (second harmonic frequency) fundamental frequency? - ANSWER-the frequency of sound created by the transducer and transmitted into the body. transducer transmits a sound pulse with a frequency of 2 MHz.. what about in harmonic mode? -...

What are the 6 major components of the ultrasound system? - ANSWER--Transducer -Pulser and beam former -Receiver -Display -Storage -Master synchronizer What do the Pulser and Beam former do? - ANSWER-Create and control the electrical signals sent to the transducer to generate sound pulses ...

Two items that are not associated. - ANSWER-Unrelated Two items that are associated or affiliated (the relationship between the items does not have to be specified). - ANSWER-Related, or proportional Two items that are associated such that when one item increases, the other increases. - ANSWER...

What does Acoustic propagation properties mean? - ANSWER-Effect of the medium upon the wave What does Biologic effect mean? - ANSWER-effect of wave upon the biologic tissue How does sound travel? - ANSWER-in a straight line Sound waves are _______ and ________ waves - ANSWER-Mechanical and ...

Parameters - ANSWER-describe features of a sound wave What are the 7 parameters? - ANSWER-period, frequency, amplitude, power, intensity, wavelength, speed What is the source of a sound wave? - ANSWER-ultrasound system and transducer What is the tissue through which the sound can travel cal...

What are the 5 parameters that describe pulse waves? - ANSWER-Pulse duration, PRP, PRF, duty factor and spatial pulse length Can a continuous wave create an image? - ANSWER-No Can a pulse wave create an image? - ANSWER-Yes What is a pulse wave? - ANSWER-Collection of cycles that travel toge...

What is defined as a beam's power divided by its area? - ANSWER-intensity What words are related to the intensities of pulsed waves? - ANSWER-spatial, peak, average, temporal, pulsed Spatial - ANSWER-refers to distance or space Peak - ANSWER-maximum value Average - ANSWER-mathematical m...

Transmission - ANSWER-Electrical energy from the system is converted into sound Reception - ANSWER-The reflected sound pulse is converted into electricity Piezoelectric Effect - ANSWER-The property of certain materials to create a voltage when they mechanically deformed or when pressure is app...