ARMRIT STUDYGUIDE PACKET EXAM
WITH CORRECT QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
T1 EFFECTS - ANSWERS-1. THE SIGNAL STRENGTH FROM ALL
IMAGES, ACQUIRED FROM ALL PULSE SEQUENCES, IS
DEPENDENT IN SOME FORM ON T1 RELAXATION RATES OF
THE TISSUE.
2. T1 RELAXATION TIME IS NOT EXACT FOR A SPECIFIC
TISSUE. MANY DIFFERENT TISSUES MAY HAVE T1
RELAXATION VALUES THAT OVERLAP.
3. T1 IS DEPENDENT ON CHOICE OF PARAMETERS,
METHODOLOGY (IE TR, TE ETC.) AND ABSOLUTE VALUES ARE
NOT A PRIORITY.
4. T1 RELAXATION VALUES ARE DEPENDENT ON THE FIELD
STRENGTH OF Bo (MAIN MAGNET) AS WELL AS
TEMPERATURE AND OTHER FACTORS (EQUIPMENT).
EXAMPLE: T1 RELAXATION TIME VALUES IN A 1.5T MR
SYSTEM ARE APPROXIMATELY TWICE AS LONG AS T1
RELAXATION TIME VALUES IN A .2T MR SYSTEM
,5. THE T1 RELAXATION TIME VALUE FOR ANY TISSUE IS
DEPENDENT VERY STRONGLY ON THE RELATIVE CONTENT OF
FAT AND FREE WATER IN THAT PARTICULAR TISSUE.
6. TISSUES THAT HAVE "SHORT" T1 RELAXATION TIME
VALUES ARE EFFICIENT AT SPIN-LATTICE AND WILL EMIT A
HIGH INTENSITY (HYPER-INTENSE) SINGAL, BRIGHT.
7.TISSUES THAT HAVE "LONG" T1 RELAXATION TIME VALUES
ARE IN-EFFICIENT AT SPIN-LATTICE AND WILL EMIT LOW
INTENSITY (HYPO-INTENSE) SIGNAL, DARK.
T1 AND MOLECULAR MOTION: - ANSWERS-T1 RELAXATION
INVOLVES THE TRANSFER OF ENERGY BETWEEN THE
HYDROGEN PROTONS AND THE ENVIRONMENT (SPIN-
LATTICE). THEREFORE, T1 RELAXATION IS SENSITIVE TO ANY
CHANGES IN THE ENVIRONMENT.
FOR EXAMPLE:
-SMALL MOLECULES (WATER) MOVE > LARMOR FREQUENCY
AND WILL APPEAR HYPO INTENSE.
-MEDIUM MOLECULES (FAT) MOVE = LARMOR FREQUENCY
AND WILL APPEAR HYPER-INTENSE.
-LARGE MOLECULES (PROTEINS) MOVE <LARMOR
FREQUENCY AND WILL APPEAR HYPO-INTENSE.
,T2 EFFECTS - ANSWERS-1. THE MEASUREMENT OF THE
SIGNAL STRENGTH FROM T2 RELAXATION IN TISSUE IS
IMPORTANT WHEN EMPLOYING A SPIN-ECHO PULSE
IMAGING SEQUENCE BUT IS LESS IMPORTANT WHEN
EMPLOYING OTHER PULSE IMAGING SEQUENCES.
2. THE MEASUREMENT OF T2 RELAXATION VALUES IN
TISSUE ARE THE MOST IMPORTANT FOR THE DETECTION OF
PATHOLOGY CONDITIONS AND TISSUE CONTRAST
RESOLUTION.
3. T2 RELAXATION VALUES OF TISSUE ARE VERY CLOSELY
RELATED TO THE STATE (SOLID, LIQUID, GAS) OF THE TISSUE
MORE THAN ANY OTHER FEATURE.
4. T2 RELAXATION VALUES ARE RELATIVELY SHORT FOR
TISSUES CONTAINING WATER BOUND TO LARGE MOLECULES
(IE PROTEINS) AND WILL APPEAR RELATIVELY HYPO-
INTENSE.
5. T2 RELAXATION VALUES FOR FREE WATER (IE CSF, URINE)
ARE RELATIVELY LONG AND WILL APPEAR HYPER-INTENSE.
IMAGE QUALITY - ANSWERS-MR IMAGE QUALITY IS A
SUBJECT THAT ENCOMPASSES SNR, CNR AND SPATIAL
RESOLUTION.
MAGNETIC FIELD - ANSWERS-A VECTOR QUANTITIY
CONSISTING OF BOTH A NORTH AND SOUTH POLE; IT
, EXERTS AN INDUCTION FORCE ON FERROMAGNETIC AND
PARAMAGNETIC SUBSTANCES. WHEN SYMBOLIZING THE
FLOW AND AREA OF A MAGNETIC FIELD, SPECIAL LINES ARE
USED; THEY ARE FIELD OR FLUX LINES
FIELD OR FLUX LINES - ANSWERS-MEASURE THE FLOW AND
AREA OF A MAGNETIC FIELD. THE STRONGEST AREA OF THE
MAGNETIC FIELD IS WHERE THE FIELD OR FLUX LINES
CONVERGE AND IS CALLED THE ISOCENTER. AWAY FROM
THE ISOCENTER THE FIELD OR FLIX LINES REPRESENT THE
FRINGE FIELDS.
ISOCENTER - ANSWERS-AREA OF THE MAGNETIC FIELD
WHERE THE FIELD STRENGTH IS THE GREATEST, IN MRI THE
CENTER OF THE SCAN AREA
FRINGE FIELDS - ANSWERS-WEAKER MAGNETIC FIELDS THAT
ARE AWAY FROM THE ISOCENTER, IN MRI OUTSIDE OF THE
SCANNING AREA.
FLUX - ANSWERS-FLOW OF ENERGY; MAGNETIC FIELD
FLOWING FROM NORTH TO SOUTH POLES REPRESENTED BY
MAGNETIC LINES OF FORCE.
WITH CORRECT QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
T1 EFFECTS - ANSWERS-1. THE SIGNAL STRENGTH FROM ALL
IMAGES, ACQUIRED FROM ALL PULSE SEQUENCES, IS
DEPENDENT IN SOME FORM ON T1 RELAXATION RATES OF
THE TISSUE.
2. T1 RELAXATION TIME IS NOT EXACT FOR A SPECIFIC
TISSUE. MANY DIFFERENT TISSUES MAY HAVE T1
RELAXATION VALUES THAT OVERLAP.
3. T1 IS DEPENDENT ON CHOICE OF PARAMETERS,
METHODOLOGY (IE TR, TE ETC.) AND ABSOLUTE VALUES ARE
NOT A PRIORITY.
4. T1 RELAXATION VALUES ARE DEPENDENT ON THE FIELD
STRENGTH OF Bo (MAIN MAGNET) AS WELL AS
TEMPERATURE AND OTHER FACTORS (EQUIPMENT).
EXAMPLE: T1 RELAXATION TIME VALUES IN A 1.5T MR
SYSTEM ARE APPROXIMATELY TWICE AS LONG AS T1
RELAXATION TIME VALUES IN A .2T MR SYSTEM
,5. THE T1 RELAXATION TIME VALUE FOR ANY TISSUE IS
DEPENDENT VERY STRONGLY ON THE RELATIVE CONTENT OF
FAT AND FREE WATER IN THAT PARTICULAR TISSUE.
6. TISSUES THAT HAVE "SHORT" T1 RELAXATION TIME
VALUES ARE EFFICIENT AT SPIN-LATTICE AND WILL EMIT A
HIGH INTENSITY (HYPER-INTENSE) SINGAL, BRIGHT.
7.TISSUES THAT HAVE "LONG" T1 RELAXATION TIME VALUES
ARE IN-EFFICIENT AT SPIN-LATTICE AND WILL EMIT LOW
INTENSITY (HYPO-INTENSE) SIGNAL, DARK.
T1 AND MOLECULAR MOTION: - ANSWERS-T1 RELAXATION
INVOLVES THE TRANSFER OF ENERGY BETWEEN THE
HYDROGEN PROTONS AND THE ENVIRONMENT (SPIN-
LATTICE). THEREFORE, T1 RELAXATION IS SENSITIVE TO ANY
CHANGES IN THE ENVIRONMENT.
FOR EXAMPLE:
-SMALL MOLECULES (WATER) MOVE > LARMOR FREQUENCY
AND WILL APPEAR HYPO INTENSE.
-MEDIUM MOLECULES (FAT) MOVE = LARMOR FREQUENCY
AND WILL APPEAR HYPER-INTENSE.
-LARGE MOLECULES (PROTEINS) MOVE <LARMOR
FREQUENCY AND WILL APPEAR HYPO-INTENSE.
,T2 EFFECTS - ANSWERS-1. THE MEASUREMENT OF THE
SIGNAL STRENGTH FROM T2 RELAXATION IN TISSUE IS
IMPORTANT WHEN EMPLOYING A SPIN-ECHO PULSE
IMAGING SEQUENCE BUT IS LESS IMPORTANT WHEN
EMPLOYING OTHER PULSE IMAGING SEQUENCES.
2. THE MEASUREMENT OF T2 RELAXATION VALUES IN
TISSUE ARE THE MOST IMPORTANT FOR THE DETECTION OF
PATHOLOGY CONDITIONS AND TISSUE CONTRAST
RESOLUTION.
3. T2 RELAXATION VALUES OF TISSUE ARE VERY CLOSELY
RELATED TO THE STATE (SOLID, LIQUID, GAS) OF THE TISSUE
MORE THAN ANY OTHER FEATURE.
4. T2 RELAXATION VALUES ARE RELATIVELY SHORT FOR
TISSUES CONTAINING WATER BOUND TO LARGE MOLECULES
(IE PROTEINS) AND WILL APPEAR RELATIVELY HYPO-
INTENSE.
5. T2 RELAXATION VALUES FOR FREE WATER (IE CSF, URINE)
ARE RELATIVELY LONG AND WILL APPEAR HYPER-INTENSE.
IMAGE QUALITY - ANSWERS-MR IMAGE QUALITY IS A
SUBJECT THAT ENCOMPASSES SNR, CNR AND SPATIAL
RESOLUTION.
MAGNETIC FIELD - ANSWERS-A VECTOR QUANTITIY
CONSISTING OF BOTH A NORTH AND SOUTH POLE; IT
, EXERTS AN INDUCTION FORCE ON FERROMAGNETIC AND
PARAMAGNETIC SUBSTANCES. WHEN SYMBOLIZING THE
FLOW AND AREA OF A MAGNETIC FIELD, SPECIAL LINES ARE
USED; THEY ARE FIELD OR FLUX LINES
FIELD OR FLUX LINES - ANSWERS-MEASURE THE FLOW AND
AREA OF A MAGNETIC FIELD. THE STRONGEST AREA OF THE
MAGNETIC FIELD IS WHERE THE FIELD OR FLUX LINES
CONVERGE AND IS CALLED THE ISOCENTER. AWAY FROM
THE ISOCENTER THE FIELD OR FLIX LINES REPRESENT THE
FRINGE FIELDS.
ISOCENTER - ANSWERS-AREA OF THE MAGNETIC FIELD
WHERE THE FIELD STRENGTH IS THE GREATEST, IN MRI THE
CENTER OF THE SCAN AREA
FRINGE FIELDS - ANSWERS-WEAKER MAGNETIC FIELDS THAT
ARE AWAY FROM THE ISOCENTER, IN MRI OUTSIDE OF THE
SCANNING AREA.
FLUX - ANSWERS-FLOW OF ENERGY; MAGNETIC FIELD
FLOWING FROM NORTH TO SOUTH POLES REPRESENTED BY
MAGNETIC LINES OF FORCE.
