Axial resolution - Study guides, Class notes & Summaries

URR SPI Exam 1, Questions and Answers Scored A+ The Doppler shift is 5000Hz. The pulse repetition frequency is 9000Hz. Which of the following is true? A: The peak velocity is equal to 2 m/s B: Aliasing will occur C: Range ambiguity will occur D: The peak pressure gradient is 36 mmHg B: Aliasing will occur The acoustic impedance of the matching layer: A: must be much thinner than the transducer element B: usually the same material as the damping layer C: is usually very low ...

Reducing the likelihood of bioeffects from acoustic energy is the mission of the: A. Nyquist limit B. Reynolds number C. Huygens principle D. ALARA principle E. Poiseuille principle -answer- D. ALARA principle The number of cycles in a pulse directly related to the: A. Duty factor B. SPL C. operating frequency D. PRF E. propagation speed of the medium -answer- B. SPL The Doppler shift frequency is proportional to the: A. Cosine values B. Doppler angle C. Operat...

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...

Ultrasound waves that are traveling through a medium consist of a. electromagnetic and radio frequencies b. compressions and refractions c. electromagnetic and ionizing frequencies d. compressions and rarefactions - ️️d. What is the difference between audible sound and ultrasound? a. audible sound waves can travel through a vacuum b. audible sound has a higher frequency c. ultrasound has a higher frequency d. ultrasound waves are ionizing - ️️c. Damping in a transducer a. redu...

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 _______...

ARDMS SPI STUDY GUIDE ALREADY VERIFIED A+ How does harmonic imaging improve image quality? ️️Harmonic imaging reduces artifacts by using higher harmonic frequencies, which produce clearer, more detailed images than fundamental frequencies. What is the primary cause of side lobe artifacts? ️️Side lobe artifacts result from unwanted sound beams emitted at angles outside the main beam, potentially causing misleading echoes on the image. How does adjusting dynamic range affect ...

difference between radiography and computed tomography - correct answers radiography reduces 3D patient anatomy to 2D projection image and has superimposition of anatomy; computed tomography has a thin slice/2D image which corresponds to a 3D section of the patient without superimposed anatomy isotropic - correct answers x = y = z in voxel size reason why isotropic voxels are desired - correct answers allows you to create high resolution coronal and sagittal reconstructions; makes it easie...

Imaging a superficial mass, you adjust controls to optimize spatial resolution. What does spatial resolution consist of? - correct answer Lateral and axial resolution Which of the following does not display a sector format? - correct answer Linear-sequenced array Axial Resolution is equal to - correct answer spatial pulse length divided by 2 Resolution of of two structures at different depths along the path of the sound beam is termed: - correct answer Axial resolution Which of the f...

SPI PRACTICE QUESTIONS ALL ANSWERS CORRECT What is the purpose of axial resolution in ultrasound? ️️Axial resolution allows for the distinction between two structures along the direction of the sound beam, determined by pulse length and frequency. How does acoustic enhancement appear on an ultrasound image? ️️Acoustic enhancement appears as increased brightness behind fluid-filled structures, as fluids cause minimal attenuation of sound waves. What is the primary factor tha...

ESP X-Zone Practice Test Questions And Answers Which of these factors has the greatest influence on pulse repetition period? a. thickness of PZT crystal b. displays dynamic range c. display depth d. impedance of the medium e. attenuation of the sound beam c. display depth A sound wave with a frequency of 5 MHz is traveling in soft tissue. What is the wavelength of this sound? a. 0.3mm b. 5mm c. 0.5mm d. 0.3cm e. 0.5m a. 0.3mm What is the accuracy of reflector depth posi...