Axial resolution Study guides, Class notes & Summaries

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...

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 _______...

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...

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...

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,...

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 _______...

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

reflection return of the ultrasound wave to the transducer from a smooth surface when does the greatest amount of reflection occur when the incident beam is perpendicular to structure (specular reflection) scatter deflection of ultrasound waves from small structures (red blood cells scatter sound) refraction deflection of Ultrasound waves due to media with varied acoustic impedance attenuation loss of Ultrasound signal due to absorption in tissues as it travels ...

CaMrT study set Questions and Answers 100% Pass Small pneumothorax: what additional image to the routine pictures? - Answer-PA inspiration, PA expiration, Lateral (or lateral decub with affected lung UP) AEC not recommeneded - for expiration should be increased by 1/3 of that used for inspiration images Pneumothorax picture in PA inspo: what additional image to the routine pictures? - Answer-PA Expiration.... or lateral decub with affected lung up (air rising to the highest point in the ...

Which of the following transducers will have the worst axial resolution? a. Vector array, 3 MHz b. Linear Sequential Array, 6 MHZ c. Linear Phased Array 7.5 MHZ d. Annular Array, 6 MHz - Vector array, 3 MHz A sound wave is traveling in the body and propagates from muscle to air. What percentage of the sound wave is most likely reflected at the muscle-air boundary? a. 0.5% b. 75% c. 25% d. 5% e. 99% - 75% Which of the following lists is in decreasing order? a. mega, kilo, deca, milli...