Lateral resolution - Study guides, Class notes & Summaries

The peak velocity of aortic regurgitation indicates the maximum pressure gradient between: the aorta and the LV in systole the aorta and the LV in diastole the LV and the LA in diastole the LV and the LA in diastole - the aorta and the LV in diastole Which type of image resolution improves with proper placement of the focal zone at the area of interest? temporal lateral contrast elevational - Lateral The tissue of the interventricular septum will be best visualized when:

A highly attenuating structure inhibits the transmission of sound which produces an anechoic area, posterior to the structure known as - Shadowing Increasing sector size increases the - Number of pulses needed to create the image Increasing sector size will decrease the - Frame rate and temporal resolution Spatial resolution will improve with - Increased line density ________________ resolution is the ability to differentiate two reflectors that are perpendicular to the US beam - Lateral _______...

Visualizing the ribs on a mammogram ensured that the entire breast was on the image. a) True b) False B) False Use of sponges as a positioning aid when performing a lateral view that included imaging into the lung field compromised which physics principle? a) Sharpness/resolution b) Line focus principle c) Inverse square law d) Reciprocity law failure A) Sharpness/resolution

ARDMS SPI Exam |Questions and Verified Answers| 100% Correct| Grade A (Latest 2023/ 2024 Update) Q: what does coded excitation improve in addition to penetration? A. lateral resolution B. signal-to-noise ratio C. frame rate D. dynamic range Answer: B Q: how is lateral resolution determined for a pulsed-echo system using a tissue-mimicking test object? A. by observing spaces between reflectors perpendicular to the beam B. by observing spaces between reflectors along the beam path ...

SPI Practice Test Questions And Answers Graded A+. Which of the following do the source and the medium determine? a. duty factor b. frequency c. propagation speed d. axial resolution - correct answer. d. Axial resolution is affected by all of the following EXCEPT a. frequency b. damping c. spatial pulse length d. focusing - correct answer. d. Damping in a transducer a. reduces the number of cycles in a pulse and increases the quality factor b. increases the...

Glaucoma- Clinical Examination Qs&As A+ methods to view anterior chamber angle - ANS-- ultrasound biomicroscopy - gonioscopy when to perform gonio? - ANS-- all glaucoma suspects, glaucoma patients, and narrow angle patients - key to obtaining the correct diagnosis of the type of glaucoma present grade 4 angle (Schaefer) - ANS->20 degrees grade 3 angle (Schaefer) - ANS-10-20 degrees grade 2 angle (Schaefer) - ANS-<10 degrees grade 1 angle (Schaefer) - ANS-partially/completely clos...

Which of the following adjustments will change the image data that will be stored in the memory of the ultrasound system? A) Both pre-processing and post-processing B) Post-processing C) Changing monitor contrast settings at the beginning of the exam. D) Pre-Processing - Pre-processing-is performed as the image is "live" or in real time, before it has been stored to memory. Which measurement of beam intensity is used to describe levels of intensity associated with US bioeffects? A) Sp...

ARDMS SPI Exam |Complete Questions with Correct Answers Graded A+ When the direction of the wave propagation is parallel to the particle motion of the medium, the wave being transmitted is called a: A) surface wave. B) longitudinal wave. C) transverse wave. D) non-linear sound. B) longitudinal wave If the sound beam attenuated 6 dB, what will happen to the overall intensity? A) Quadrupled B) Doubled C) Halved D) Quartered D) Quartered Frequency increased from 3 MHz to 6 MHz,...

Neuroscience EXAM 3– USA (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A Q: Where does the light enter through? Answer: lens Q: Once light enters through the lens it goes to the what? Answer: retina Q: What is the central fixation for each eye w the highest visual acuity? Answer: fovea Q: This surrounds the fovea and also has a relatively high visual acuity? Answer: macula Q: This area is formed by axons le...

Lateral resolution is related to → ~:- The spacing of reflectors perpendicular to the beam When using Doppler ultrasound, what is proportional to the amount of absorption and determines the depth of penetration? → ~:- Frequency of the transmitted ultrasound If the frequency of the transducer increases, the wavelength → ~:- Decreases Clinical manifestations of portal hypertension include (3) → ~:- -splenomegaly -encephalopathy -Ascites What symptoms suggest compromised circu...