1- In the graph in the Following Figure, the T1 and T2 curves are plotted simultaneously forconvenience. Assume the following values for T1 and T2: for white matter (WM): T1 500, T2 = 100msec for cerebrospinal fluid (CSF): T1 = 2000, T2 = 200 msec Also assume a spin density N = 100 forboth WM and CSF.a. For a TR = 2000 msec, find the relative signal intensities for WM and CSF (i.e., pointsA and B on the graph).b. Calculate the crossover TE where WM and CSF have identical T2 weighting (point C).c. Now, calculate the signal intensities of WM and CSF for TE = 25 (first echo) and TE =100 msec (second echo), and the ratio CSF/WM.d. Repeat (a) to (c) for TR = 3000 msec and observe how one gets more T2 weighting inthe 2nd echo (higher ratio CSF/WM).e. Now, calculate the signal intensities for TR = 3000 and TE = 200 msec. Notice thatdespite relative loss of signal for both WM and CSF, the ratio CSF/WM actually increases,indicating more T2 weighting (i.e., CSF gets brighter on the images).100%-SignalIntensityWMCSFTRTETRTE (crossover)T1 and T2 curves are plotted simultaneously. Use this graph to answer the questions2- Match the following: (i) reduces T1 effect; (ii) enhances T1 effect; (iii) reduces T2effect; (iv)enhances T2 effect with:a- short TR--b- long TR--c- short TEd- long TE-3- For a material having a T2 of 80 msec 320 msec after a 90 pulse, what is the relativemagnitude of the MR signal compared to the maximum signal.4- If a material has a longitudinal relaxation time constant T1 = 200 msec, what will theMR signal S be 200 ms after an RF pulse has flipped (nutated) the bulk magnetizationinto the transverse plane?

To given thatFor white matter(WM)T1=500 T2=100For cerebropinal fluid(CSF)T1=2000…

udej8 onvenience. Assume the following values for T1 and T2: for white matter (WM): T1 = 500 nsec for cerebrospinal fluid (CSF): T1 = 2000, T2 = 200 msec Also assume a spin density N oth WM and CSF. a. For a TR = 2000 msec, find the relative signal intensities for WM and CSF (i.e., point A and B on the graph). b. Calculate the crossover TE where WM and CSF have identical T2 weighting (point C c. Now, calculate the signal intensities of WM and CSF for TE = 25 (first echo) and TE = 100 msec (second echo), and the ratio CSF/WM.

udej8 onvenience. Assume the following values for T1 and T2: for white matter (WM): T1 = 500 nsec for cerebrospinal fluid (CSF): T1 = 2000, T2 = 200 msec Also assume a spin density N oth WM and CSF. a. For a TR = 2000 msec, find the relative signal intensities for WM and CSF (i.e., point A and B on the graph). b. Calculate the crossover TE where WM and CSF have identical T2 weighting (point C c. Now, calculate the signal intensities of WM and CSF for TE = 25 (first echo) and TE = 100 msec (second echo), and the ratio CSF/WM.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.19P: 5.19 Suppose that the graph below shows measured values of for air in forced convection over a...

See similar textbooks

Related questions

Q: G) FNT 5: Groups 1-3: Path A Groups 3-6: Path B Here are the numerical results for FNT 5: A: WA =…

A: Given: To find:

Q: 5. Sketch the following function in frequency domain plot: i. Y(t) = 3 sin (4лt) + 4 cos (4 лt) ii.…

A: Given data i) Y(t) = 3 sin (4πt) + 4 cos (4πt)ii) Y(t) = 12 sin (10πt) + 5 sin (20πt) + sin…

Q: Consider that the free response of the mechanical system is given by y(t) = 5e-at cos(2nf) (Eq. 1)…

A: Calculate the frequency of damped oscillations of the system in Hertz and rad/s.

Q: 5. For the overdamped oscillations, the displacement x(t) is expressed by the following x(t)-e-t [A…

A: Given data: x(t) = e-βt A eωt + B e-ωtWe have to find it's expression in terms of hyperbolic…

Q: The tendency of higher frequency source harmonics of a complex sound to drop off in power relative…

A: Given: Higher frequency source

Q: a string is attached to a mechanical vibrator, which has a frequency of 30Hx. the sttring is 3.0m…

A: Given Data The length of the string is: l=3 m The frequency is: f=30 Hz The linear density is:…

Q: Geochemical Box Models - please use same terminology found in question Consider an element X…

A: First of all, write the net flux value, As, it is known that if CA>>CB, Then MA is equivalent…

Q: It is desired to increase the transmission loss between a highway and a residence 100 m from the…

Q: The equation of motion of a harmonic oscillator is given by ÿ+2Çwný + why = 0 and the initial %3D…

A: 3rd option is correct.

Concept explainers

Free undamped vibrations

Whenever an object/system displaces in either side of its equilibrium position with the help of an external/internal means, then the object/system moves regularly or randomly on both sides of its equilibrium position. This motion is called vibration. Generally, there are three types of vibration: longitudinal vibration, transverse vibration, and torsional vibration.

Question

1- In the graph in the Following Figure, the T1 and T2 curves are plotted simultaneously for
convenience. Assume the following values for T1 and T2: for white matter (WM): T1 500, T2 = 100
msec for cerebrospinal fluid (CSF): T1 = 2000, T2 = 200 msec Also assume a spin density N = 100 for
both WM and CSF.
a. For a TR = 2000 msec, find the relative signal intensities for WM and CSF (i.e., points
A and B on the graph).
b. Calculate the crossover TE where WM and CSF have identical T2 weighting (point C).
c. Now, calculate the signal intensities of WM and CSF for TE = 25 (first echo) and TE =
100 msec (second echo), and the ratio CSF/WM.
d. Repeat (a) to (c) for TR = 3000 msec and observe how one gets more T2 weighting in
the 2nd echo (higher ratio CSF/WM).
e. Now, calculate the signal intensities for TR = 3000 and TE = 200 msec. Notice that
despite relative loss of signal for both WM and CSF, the ratio CSF/WM actually increases,
indicating more T2 weighting (i.e., CSF gets brighter on the images).
100%-
Signal
Intensity
WM
CSF
TR
TE
TR
TE (crossover)
T1 and T2 curves are plotted simultaneously. Use this graph to answer the questions
2- Match the following: (i) reduces T1 effect; (ii) enhances T1 effect; (iii) reduces T2
effect; (iv)enhances T2 effect with:
a- short TR--
b- long TR--
c- short TE
d- long TE-
3- For a material having a T2 of 80 msec 320 msec after a 90 pulse, what is the relative
magnitude of the MR signal compared to the maximum signal.
4- If a material has a longitudinal relaxation time constant T1 = 200 msec, what will the
MR signal S be 200 ms after an RF pulse has flipped (nutated) the bulk magnetization
into the transverse plane?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

The drag on an airplane wing in flight is known to be a function of the density of air (), the viscosity of air(), the free-stream velocity (U), a characteristic dimension of the wing (s), and the shear stress on the surface of the wing (s). Show that the dimensionless drag, sU2, can be expressed as a function of the Reynolds number, Us.
Topics Discussed: Static of Rigid Bodies, Force Vector, Addition of a System of Coplanar Forces, Cartesian Vector Please re-compute and re-solve the given, This is my answer. But I also want to see your expert answer if we land in the same solutions and answers. Please show your complete solution. Thank you.
Don't Use Chat GPT Will Upvote And Give Solution In 30 Minutes Please
For the following concentration expressions, indicate whether they are uniform or nonuniform and in how many dimensions (OD, 1D, 2D, or 3D), and steady or unsteady. Then for the following control volume and origin, and table of constants, use Excel or Matlab to graph profiles that show how concentration changes within the control volume and over time to a limit of 20 for the following: C(x,0,0,0), C(0,y,0,0), c(0,0,z,0) and C(0,0,0,t). On each graph, show which parameters are held constant, the CV boundaries, and the point where all four plots overlap. 20 C(x=0) 10 a 0.0001 b 0.001 20 0.01 y k 0.1 100 All of the following functions are C(space, time) and so not necessarily just x as suggested. a. C,(x)= C,(x = 0)x exp{- ax} d. C, (x) = C, (x = 0)x exp{-ax}x exp{- by² }x exp{-cz²}x exp{- kt}
Topics Discussed: Static of Rigid Bodies, Force Vector, Addition of a System of Coplanar Forces, Cartesian Vector Please re-compute and re-solve the given, This is my answer. But I also want to see your expert answer if we land in the same solutions and answers. Please show your complete solution. Thank you.
1. For the following concentration expressions, indicate whether they are uniform or nonuniform and in how many dimensions (OD, 1D, 2D, or 3D), and steady or unsteady. Then for the following control volume and origin, and table of constants, use Excel or Matlab to graph profiles that show how concentration changes within the control volume and over time to a limit of 20 for the following: C(x,0,0,0), C(0,y,0,0), C(0,0,z,0) and C(0,0,0,t). On each graph, show which parameters are held constant, the CV boundaries, and the point where all four plots overlap. 20 C(x=0) 10 a 0.0001 b 0.001 | 20 0.01 k 0.1 100 All of the following functions are C(space, time) and so not necessarily just x as suggested. a. C,(x)= C,(x = 0)x exp{- ax}
I need help coding in MATLAB. Can you code an example of calibration problem of magnetometers? Assume the uncalibrated values.
4
Given: The plane accelerates in its current trajectory with a= 100 m/s^2 Farag Angle theta= 5° W=105 kips F_drag= 80 kips m= 1000 lbs Find: F_thrust, F_lift Please include the KD. Fthrust Futel t Fueight 000 BY NC SA 2013 Michael Swanbom
Topics Discussed: Static of Rigid Bodies, Force Vector, Addition of a System of Coplanar Forces, Cartesian Vector Please re-compute and re-solve the given, This is my answer. But I also want to see your expert answer if we land in the same solutions and answers. Please show your complete solution. Thank you.
I need help with my MATLAB code. I am trying to plot the semi major axis and eccentricity with the following code with rungge kutta method. I have two different nnn's in the code which produce two different step sizes. So, I am wondering why both give the same exact plots for semi-major axis and eccentricity. The orbital dynamics fucntion considers J2, drag, SRP, and third body effects. % Orbital elements obtained from TLE inc = 63.5000118; % Inclination (degs) raan = 19.999977; % RAAN (degs) ecc = 0.001; % Eccentricity argp = 120.02165342; % argument of perigee (degs) v = 0; % True anomaly (degs) a = 6584.697271; % Semi-major axis (km) mu = 3.986e5; period = (2*pi*sqrt((a^3)/mu)); % Calculating the state vector in eci frame [x, y, z, vx, vy, vz] = kep2cart(a, ecc, inc, raan, argp, v); Y = [x, y, z, vx, vy, vz]; options = odeset('RelTol', 1e-12, 'AbsTol', 1e-12); nnn1 = 800; t_step1 = period/nnn1; m6 = 50; h_step6 = t_step1/m6; t_total6 = 0:h_step6:10*period; [t6,…
Can you please answer this