Mechanical transducer Study guides, Class notes & Summaries

ARDMS- SPI Comprehensive Exam (2023/24) || Questions & 100% Correct Solutions ARDMS- SPI Comprehensive Exam (2023/24) || Questions & 100% Correct Solutions Mechanical transducer image shape: - ANSWER - fan or sector-shaped Mechanical transducers have a _________ focal depth. - ANSWER - fixed When there is any damage done to the crystal in a mechanical transducer, - ANSWER - the entire image is lost Array transducers are comprised of... - ANSWER - a single slab of PZT cut into ...

Frequencies used in transthoracic imaging are usually in the range of ____________. Frequencies used in transesophageal imaging are usually in the range of ______________. A) 3-6 MHz;6-8 MHz B) 3-6 MHz; 5-7 MHz C) 2.5-4 MHz; 5-7 MHz D) 1-3 MHz; 6-8 MHz - 2.5-4 MHz; 5-7 MHz Which of the following will aid in visualization of the endocardium? A) Increased transducer frequency B) Larger sector size C) Increased wall filter D) Agitated saline contrast - Increased transducer frequency-this ...

CEFM Practice Test| Answered 100% Correctly| Updated The paper speed used with EFM in North America is: a. 1cm/min b. 2cm/min c. 3cm/min C. 3cm/min The US transducer on the EFM measures the a. Electrical signal of the fetal heart b. Mechanical movement of the fetal heart reflected off of sound waves c. R to R intervals of the fetal heart b. Mechanical movement of the fetal heart reflected off of sound waves The purpose of the autocorrelation in external monitoring is to a. Compare i...

Waves are classified according to whether or not they need a medium in which to propagate. A wave which needs a medium is called a(n) ______________________ wave, a wave which will propagate in a vacuum (the absence of a medium) is called a(n) ________________ wave correct answer: mechanical, electromagnetic What are the two classifications of mechanical waves? correct answer: Transverse and longitudinal Frequency has the units of: (select all that apply) A. Cycles/second B. Hz C. Her...

1. The paper speed used with EFM in North America is: a. 1cm/min b. 2cm/min c. 3cm/min ANS : c. 3cm/min 2. The US transducer on the EFM measures the a. Electrical signal of the fetal heart b. Mechanical movement of the fetal heart reflected off of sound waves c. R to R intervals of the fetal heart ANS : b. Mechanical movement of the fetal heart reflected off of sound waves 3. The purpose of the autocorrelation in external monitoring is to a. Compare incoming waveforms for comparison ...

What is an advantage of single crystal- or pure-wave crystal transducer? A) wide bandwidth B) lower frequencies at higher resolution C) absence of aliasing with pulsed Doppler D) higher frame rate E) greater steering angles - Answer- A If you wish to perform a sonogram with the largest possible field of view in the near field and at depth, what type of array transducer would be preferable? A) linear array B) curved array C) phased array D) sector E) all of the above - Answer- ...

The doppler shift is 5000 Hz. The pulse repetition frequency is 9000 Hz. Which of the following is true? A. peak pressure gradient is 36mmHg B. range ambiguity will occur C. aliasing will occur D. the peak velocity is equal to 2 m/s - ️️C. aliasing will occur When evaluating a suspected arterial stenosis, a doppler angel of ____ degrees will produce the most accurate flow velocity. A. 0 B. 30 C. 60 D. 90 - ️️A. 0 Spatial resolution is: A. the minimum reflector separation req...

CEFM Practice Test| Answered 100% Correctly| Updated The paper speed used with EFM in North America is: a. 1cm/min b. 2cm/min c. 3cm/min C. 3cm/min The US transducer on the EFM measures the a. Electrical signal of the fetal heart b. Mechanical movement of the fetal heart reflected off of sound waves c. R to R intervals of the fetal heart b. Mechanical movement of the fetal heart reflected off of sound waves The purpose of the autocorrelation in external monitoring is to a. Compare i...

What type of wave is sound? - CORRECT ANSWER mechanical and longitudi-nal The frequency ranges for ultrasound are: - CORRECT ANSWER >20 kHz The speed of sound in soft tissue is: - CORRECT ANSWER 1540 m/s which of the following transducers fires the elements in groups? A. Linear sequenced array B. Phased array C. Continuous-wave transducer D. Single-element transducer - CORRECT ANSWER A Enhancement is caused by** - CORRECT ANSWER weakly attenuat...

what improves temporal resolution -answer- low line density, high frame rate, narrow sector line, fewer pulse per frame which of the following is true when the dynamic aperature is increased -answer- near zone length increases Which of the following is the standard protocol for digital imaging that allows compatibility and communication between computers, workstations, and network hardware provided by various manufacturers of CT, MRI, and ultrasound -answer- DICOM the beam of an unfocus...