Atoms of elements with the same number of protons but a different number of _______ are called isotopes.

2

The __________ is the sum of the protons in the nucleus.

2

The ________ is the sum of the protons and neutrons in the nucleus.

2

The isotope of the hydrogen nucleus is called __________.

4

High-energy nuclei align their magnetic moments in the anti-parallel direction and are termed ______________.

6

Low-energy nuclei align their magnetic moments parallel to the external field and are termed_____________.

6

The net magnetic moment of the patient is called the _________.

 8

The static external magnetic field is called ___________.

8

The Larmor equation states that:

9

 ω₀ = B₀ x λ

• ω₀ is the precessional frequency
• B₀ is the magnetic field strength of the magnet
• λ is the gyrometric ratio

At 1.0 T, the precessional frequency of hydrogen is ________.

9

For resonance of hydrogen to occur, an _______ of energy at exactly the Larmor frequency of hydrogen must be applied.

11

The application of an RF pulse that causes resonance to occur is termed ____________.

11

The angle to which the NMV moves out of alignment is called the ___________.

11

flip angle

B₀ is termed the _____________ plane.

 12

The plane at 90° to B₀ is termed the ____________ plane.

12

_______________ is the position of each magnetic moment on the precessional path around B₀.

13

The amount of magnetization in the longitudinal plane gradually increasing is called ____________.

16

The amount of magnetization in the transverse plane gradually decreasing is called _____________.

16

The induction of reduced signal is called the ______________.

16

free induction decay

(FID)

The recovery of longitudinal magnetization is caused by a process termed __________.

16

______________ is caused by the nuclei giving up their energy to the surrounding environment or lattice, and it is termed _____________.

16

_____________ is caused by the magnetic fields of neighboring nuclei interacting with each other, termed ___________.

16

The ________ is the time it takes 63% of the longitudinal magnetization to recover in the tissue.

16

The _________ is the time it takes 63% of the transverse magnetization to be lost.

16

A series of RF pulses, gradient applications and intervening time periods is called a ____________.

19

The _________ is the time from the application of one RF pulse to the application of the next RF pulse for each slice and is measured in milliseconds (ms).

20

The _______determines the amount of longitudinal relaxation that is allowed to occur between the end of one RF pulse and the application of the next.

20

TR determines the amount of _______ relaxation that has occurred when the signal is read.

20

The ___________ is the time from the application of the RF pulse to the peak of the signal induced in the coil and is measured in ms.

20

The _________ determines how much decay of transverse magnetization is allowed to occur.

20

TE controls the amount of _________relaxation that has occured when the signal is read.

20