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BME40005 Advanced Medical Imaging Systems

Question

Answered

Task:

General MRI questions:

1.What is the purpose of the main magnetic field in a MRI?

a) To align electrons

b) To ionize the target anode

c) Thermionic emission

d) To align nuclei spins

2.What is the purpose of the gradient coils in a MRI?

a) To align electrons

b) To excite nuclei spins into the transverse plane

c) To allow images to be taken of specific areas in the body

d) To measure any changes in the main magnetic field

3.What is the purpose of the RF coils in a MRI?

a) To excite nuclei spins

b) To excite electrons

c) To measure changes in magnetic field produced by nuclei spins

d) To cool the main magnet

4.What is the overall alignment of nuclei spins before being placed in the main MRI magnetic field?

a) In the transverse plane

b) Parallel to the main MRI magnetic field

c) Random alignments, so spins effectively cancel each other out

d) Anti-parallel to the main MRI magnetic field

5.What is the overall alignment of nuclei spins after being placed in the main MRI magnetic field?

a) In the transverse plane

b) Parallel to the main MRI magnetic field

c) Random alignments, so spins effectively cancel each other out

d) Anti-parallel to the main MRI magnetic field

6.Which of the following are relaxation processes of nuclei spins in MRI after they have been excited?

a) Mass attenuation coefficient

b) Longitudinal relaxation

c) T4

d) Transverse relaxation

Watch the “BME40005 - MRI staff interview” and “Swinburne Neuroimaging Upgrade” videos and answer the following questions.

7.Which of the following statements are correct?

a) Radiographer - reviews and interprets the imaging scans to aid in making a diagnosis

b) Radiologist - reviews and interprets the imaging scans to aid in making a diagnosis

c) Radiographer - operates the imaging equipment and guides patients through the scanning process to ensure quality images are produced

d) Radiologist - operates the imaging equipment and guides patients through the scanning process to ensure quality images are produced

8.What was the old type of MRI system that was recently replaced at Swinburne?

a) GE 1.5T Optima 450W

b) Siemens Tim Trio 3T magnet

c) Philips Ingenia 1.5T

d) Siemens Magnetom Prisma 3T

9.What is the new type of MRI system that was recently installed at Swinburne?

a) GE 1.5T Optima 450W

b) Siemens Tim Trio 3T magnet

c) Philips Ingenia 1.5T

d) Siemens Magnetom Prisma 3T

10.What is the strength of the main magnetic field of the Swinburne MRI system?

a) 1.5 T

b) 1.5 kg

c) 3 N

d) 3 T

11.What is used to cool the main magnet of the Swinburne MRI system?

a) Ice

b) Dry ice

c) Air

d) Liquid helium

12.How many times a year does the helium of the Swinburne MRI need to be refilled?

a) Never

b) Once

c) 3 to 4 times

d) Once every month

13.Name two advantages of the new Swinburne MRI system over the old system that it has just replaced:

14.Aside from the standard (T1 and T2) anatomical scans, name two other scan types that are possible with the Swinburne MRI system (as discussed by Annalaise):

15.What exciting advance in MRI research does Catherine discuss towards the end of the interview video?

Safety questions:

Consult the lecture notes and “MRI Visitor Protocol Information and Safety Questionnaire” document and answer the following questions.

16.What is the source of loud noise when the MRI is taking a scan?

a) Electrical noise from the cooling system

b) The main magnetic field being turned on and off

c) Switching of currents within the gradient coils

d) The detector system spinning around inside the casing

17.When entering a MRI facility should you always assume that the main magnet is switched on?

a) Yes

b) No

18.What sorts of shielding are used in the Swinburne MRI facility?

a) Active shielding for the fringe field

b) Faraday cage, room shielding

c) Lead shielding for ionizing radiation

d) Waveguides to pass connections/cables into the MRI room

19.What is the zone designation of the MRI exam scanner room?

a) Zone 1

b) Zone 2

c) Zone 3

d) Zone 4

20.Who can enter Zone III or IV in the Swinburne MRI facility?

a) People who have completed the full SNI MRI pre-scan information, safety questionnaire and consent forms, and are under supervision of a SNI radiographer

b) Any Swinburne staff member

c) MRI researchers who have completed the SNI MRI Safety Induction Training and signed off as accepting responsibility for themselves 

d) Siemens’ engineers 

e) Swinburne security staff

21.When entering a MRI facility should you always assume that the main magnet is switched on?

a) Yes

b) No

MRI Research Paper Questions:

Consult the “Research article – MRI” document and complete the following questions for the article that you have been assigned.

22.What is the full title of the research article?

23.What is the name of the institution(s) of the first author?

24.In your own words summarise the aim of the study (a few sentences)?

25.In your own words summarise the key outcome of the testing or the main implications of the findings of the study (a few sentences)?

26.What type of MRI scanner was used in the study?

27.What type(s) of scan sequences were used in the in the study

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CEPI0913 Introduction to Nanotechnology

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