MDCB Board Review Questions with Complete Solutions (Latest 2025) In terms of a computer, what do the following acronyms
stand for:
CRT LED LCD ROM
RAM - Correct Answers ✅CRT: cathode ray tube
LED: liquid emitting diode
LCD: liquid crystal display
ROM: read only memory (permanent, can't write over)
RAM: random access memory (temporary, lost when
computer turns off) What is used for MRI magnet shielding? What is used for MRI radiofrequency shielding? - Correct Answers ✅-steel plates -metal mesh (Faraday cage) What strength of MRI has been shown to have no biological effects? - Correct Answers ✅If <10Tesla, then no biological effects What is the cause for acoustic noise with an MRI machine? - Correct Answers ✅The switching of gradient fields 1 / 4
MDCB Board Review Questions with Complete Solutions (Latest 2025) What is the event of a rapid boil-off of the liquid nitrogen or liquid helium surrounding the MRI magnet, which is a failure of the emergency venting system and can cause a life- threatening oxygen shortage in the MRI room? - Correct Answers ✅Quench What is the resolution of MRI? Spatial accuracy? - Correct
Answers ✅-Resolution: 0.3lp/mm
-Spatial accuracy: 1mm-2mm
How can the resolution of an MRI be bettered? - Correct Answers ✅Use stronger gradients What are some disadvantages of MRI? - Correct Answers ✅-Image distortion due to lack of homogeneity of magnetic fields and due to the gradients having slight spatial non- linearities -No electron density info -Long scan times (motion artifacts) -Spatial resolution not as good as CT What 9 structures are evaluated on an MRI? - Correct Answers ✅-CSF -Gray matter -White matter 2 / 4
MDCB Board Review Questions with Complete Solutions (Latest 2025) -Fat -Cortical bone -Air -Blood -Oedema -Protein
On a T1 MRI image, how does the following anatomy look:
-CSF -Gray matter -White matter -Fat -Cortical bone -Air -Blood -Oedema
-Protein - Correct Answers ✅-CSF: dark
-Gray matter: gray
-White matter: bright
-Fat: bright
-Cortical bone: dark
-Air: dark
-Blood: dark 3 / 4
MDCB Board Review Questions with Complete Solutions (Latest 2025)
-Oedema: grey/dark
-Protein: bright
On a T2 MRI image, how does the following anatomy look:
-CSF -Gray matter -White matter -Fat -Cortical bone -Air -Blood -Oedema
-Protein - Correct Answers ✅-CSF: bright
-Gray matter: gray
-White matter: gray
-Fat: gray
-Cortical bone: dark
-Air: dark
-Blood: dark
-Oedema: bright
-Protein: bright
- / 4