Nuclear Magnetic Resonance-Bushberg Chapter 14 Diagnostic Radiology Imaging Physics Course Raphex 2003 Diagnostic Questions Raphex 2003 Diagnostic Questions D56.In MRI,pure water will have aT1 and a D55.In MRI contrast is created by all of the following .T2 except: ◆A.long.long A.Administration of a contrast agent. ◆B.long,shor B.Differences in atomic number C.short,long C.Differences in hydrogen content ◆D.short,short D.Differences in T1 time of tissues. E.Differences in T2 time of tissues. 色制 Raphex 2002 Diagnostic Questions Raphex 2000 Diagnostic Questions D52.In biological tissue,relaxation times are ordered: D46.The T2 relaxation time of a tissue is about 60 msec on an MRI system with a 0.5 Tesla magnet.On a 1.5 ◆A.T1<T2<T2 Tesla MRI system,one might expect the T2 relaxation ◆B.T1<T2*<T2 time to: 。C.T2*<T2<T1 ◆D.T2<T2*<T1 A.Decrease significantly. ◆E.T2<T1<T2 ◆B.Decrease slightly C.Increase significantly. ÷D.Increase slightly. ◆E.Remain the same. 9.19and26May2005Nuclear Magnetic Resonance – Bushberg Chapter 14 Diagnostic Radiology Imaging Physics Course 9, 19 and 26 May 2005 9 © UW and Brent K. Stewart, PhD, DABMP 33 Raphex 2003 Diagnostic Questions Raphex 2003 Diagnostic Questions ™ D56. In MRI, pure water will have a _ T1 and a . In MRI, pure water will have a _ T1 and a _ T2. _ T2. ™ A. long, long ™ B. long, short B. long, short ™ C. short, long ™ D. short, short D. short, short © UW and Brent K. Stewart, PhD, DABMP 34 Raphex 2003 Diagnostic Questions Raphex 2003 Diagnostic Questions ™ D55. In MRI contrast is created by all of the following . In MRI contrast is created by all of the following except: except: ™ A. Administration of a contrast agent. A. Administration of a contrast agent. ™ B. Differences in atomic number. B. Differences in atomic number. ™ C. Differences in hydrogen content. C. Differences in hydrogen content. ™ D. Differences in T1 time of tissues. D. Differences in T1 time of tissues. ™ E. Differences in T2 time of tissues. E. Differences in T2 time of tissues. © UW and Brent K. Stewart, PhD, DABMP 35 Raphex 2002 Diagnostic Questions Raphex 2002 Diagnostic Questions ™ D52. In biological tissue, relaxation times are ordered: In biological tissue, relaxation times are ordered: ™ A. T1 < T2 < T2* A. T1 < T2 < T2* ™ B. T1 < T2* < T2 ™ C. T2* < T2 < T1 ™ D. T2 < T2* < T1 ™ E. T2 < T1 < T2* E. T2 < T1 < T2* © UW and Brent K. Stewart, PhD, DABMP 36 Raphex 2000 Diagnostic Questions Raphex 2000 Diagnostic Questions ™ D46. The T2 relaxation time of a tissue is about 60 msec . The T2 relaxation time of a tissue is about 60 msec on an MRI system with a 0.5 Tesla magnet. On a 1.5 on an MRI system with a 0.5 Tesla magnet. On a 1.5 Tesla MRI system, one might expect the T2 relaxation Tesla MRI system, one might expect the T2 relaxation time to: time to: ™ A. Decrease significantly. A. Decrease significantly. ™ B. Decrease slightly. B. Decrease slightly. ™ C. Increase significantly. C. Increase significantly. ™ D. Increase slightly. D. Increase slightly. ™ E. Remain the same. E. Remain the same