Pulse echo technique - Study guides, Class notes & Summaries

ADVANCED PULSE SEQUENCES AND ECHO FORMATION QUESTIONS AND ANSWERS WITH SOLUTIONS 2024 Which of the following can be achieved by using gradient-echo pulse sequences? - ANSWER Improve temporal resolution The inversion recovery pulse sequence that is used to suppress CSF in proton density and T2-weighted images is known as what? - ANSWER FLAIR Balance gradient echo is utilized to reduce the effects of: - ANSWER Phase Dephasing Dixon technique can be used to produce ____________ images. A...

An analogy for the decoding of the MR signal through Fourier Transform - ANSWER-Basilar membrane processing sound Logically each line of phase encoding data is combined to allow the FT to determine the position along the y-axis. The number of phase encoding steps determines - ANSWER-the number of pixels along the y-axis In a gradient echo pulse sequence, which flip angle will produce a T2 weighted gradient echo image. - ANSWER->20 - <45 degree flip angle In a horizontal magnet, wh...

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...

Electromagnetic energy is symbolized by a sine wave that has two components of measurements, they are: - Answer-Wavelength and frequency Of the following techniques which one is applied to prevent "crosstalk" between multi-slices with little or no interslice "gap" - Answer-Interleaving The artifact known as aliasing, wrap around or fold over will always show up in what gradient direction? - Answer-Phase encoding Which of the following causes of artifacts on MR images is most commonly m...

ARMRIT-Practice test (part 2 Mri Clinical applications) questions and answers Tissues that have low (short) relaxation times have: - Ans ️️ -High (long) relaxation rates Spatial resolution is an image quality factor determined by ________ and ________. - Ans ️️ - Slice thickness and pixel size Inversion time, In an inversion recovery pulse sequence, is the time interval between the: - Ans ️️ -180 and 90 degree pulses A complicated equation for predicting the MR signal intensit...

ARDMS SPI Practice Exam B Questions and Answers Which artifact is illustrated by this image? - CORRECT ANSWER-a) Shadowing b) Side Lobe c) Reverberation d) Mirroring What is increased if the pulse duration is decreased? - CORRECT ANSWER-a) Bandwidth b) Line Density c) Frame Rate d) Duty Factor What is the most appropriate action for the sonographer to take when receiving a verbal order for an exam? - CORRECT ANSWER-a) Deny performance of the exam until a written request is rece...

Tissues that have low (short) relaxation times have: - Answer High (long) relaxation rates Spatial resolution is an image quality factor determined by ________ and ________. - Answer Slice thickness and pixel size Inversion time, In an inversion recovery pulse sequence, is the time interval between the: - Answer 180 and 90 degree pulses A complicated equation for predicting the MR signal intensity from a tissue subject to a spin-echo sequence is the: - Answer Bloch Equation In a grad...

CCI exam questions with correct answers Which valves separate the areas of greatest pressure differences (and lowest) Answer Mitral valve (TV) The LAD lies in the _______ interventricular sulcus? Answer Anterior From the left parasternal window which of the following are you most likely to get accurate velocity measurements? Answer pulmonary artery During which phase do the Coto Aries fill? Answer Easily diastole From the apical 4ch view how do you rotate the transducer to obtain th...

The 2 types of enhancement media described by Lauffer, the mechanism of T1 agents is - Answer to decrease T1 relaxation time, thus emitting high signal An analogy for the decoding of the MR signal through Fourier Transform - Answer Basilar membrane processing sound Logically each line of phase encoding data is combined to allow the FT to determine the position along the y-axis. The number of phase encoding steps determines - Answer the number of pixels along the y-axis In a gradient ech...

MRI PHYSICS- Armrit Test- Solved Signal - Ans ️️ -Current induced iby receiver coil. Also comes from the procession of protons in the patient. Chemical pre saturation - Ans ️️ -Selectively apply 90 degree pulse at frequency of tissue to be saturated. Moves fat or HBO 90 degrees. 2nd puse wider bandwidth moves both fat and water 90 degrees. One will be saturated so will not be read. Saturating out normal anatomy, pathology is often seen more clearly. NEX number of excitations - Ans...