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Parametric Mapping is a way to measure relaxation time for longitudinal and transverse relaxation time along with extracellular volume. The Native T1 mapping or longitudinal (T1) relaxation time is the time constant which determines the rate at which excited protons return to equilibrium. It is a measure of the time taken for spinning protons to realign with the external magnetic field. The Native T1 T2 mapping or transverse (T2) relaxation time constant which determines the rate at which excited protons reach equilibrium or go out of phase with each other. It is a measure of the time taken for spinning protons to lose phase coherence among the nuclei spinning perpendicular to the main field. The term "native" means contrast niave in this context. the T2 measurement is only done prior to contrast.
"T1 mapping stands for registering the course of recovery of longitudinal magnetism", this means the relaxation time after either the preparation step (saturation or inversion prepulse) followed by the acquisition of images at several time points during the T1 recover/relaxation. T1 value represents the time when recovery of magnetism has reached a percentage of its original state (63%). The recovery rate relates to the myocardial tissue properties that may be altered by pathological tissue presence (https://www.ahajournals.org/doi/10.1161/circresaha.116.307974). T1 mapping values increase with disease, and decrease post contrast.
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Rows 1-10: | Show the T1 Longitudinal Relaxation Time, the T2 Transverse Relaxation Time, Native T1 Mapping, and Extracellular volume for different segments of the heart prior to contrast for CMR. | Rows 11-13: | Show the T1 Longitudinal Relaxation Time, Native T1 Mapping, and Extracellular volume for different segments of the heart after contrast for CMR. |
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Row | STUDYID | DOMAIN | USUBJID | CVSEQ | CVTESTCD | CVTEST | CVORRES | CVORRESU | CVSTRESC | CVSTRESN | CVSTRESU | CVSTAT | CVREASND | CVLOC | CVMETHOD | CVLOBFXL | VISITNUM | VISIT | CVTPT | CVTPTREF | CVDTC |
| CVICNOIS | CVICMOTD | CVFOIIND | CVOIQ |
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| 1 | DMD-RT | CV | 301 | 1 | T1 | LONGITUDINAL RELAXATION TIME (T1 TIME) | | ms | | 1315 | ms | | | LEFT VENTRICULAR BASAL ANTEROSEPTAL SEGMENT | CARDIAC MAGNETIC RESONANCE IMAGING |
| 1 | SCREENING | BEFORE | CONTRAST ADMINISTRATION | 2023-08-01 |
| LOW NOISE | NO MOTION DISTORTION | NO FOREIGN OBJECTS | EVALUABLE IMAGE | | 2 | DMD-RT | CV | 301 | 2 | T1 | LONGITUDINAL RELAXATION TIME (T1 TIME) | 1166 | ms | 1166 | 1166 | ms |
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| LEFT VENTRICULAR BASAL INFEROSEPTAL SEGMENT | CARDIAC MAGNETIC RESONANCE IMAGING |
| 1 | SCREENING | BEFORE | CONTRAST ADMINISTRATION | 2023-08-01 |
| LOW NOISE | NO MOTION DISTORTION | NO FOREIGN OBJECTS | EVALUABLE IMAGE | | 3 | DMD-RT | CV | 301 | 3 | T1 | LONGITUDINAL RELAXATION TIME (T1 TIME) | | ms | | 980 | ms |
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| LEFT VENTRICULAR BASAL INFERIOR SEGMENT | CARDIAC MAGNETIC RESONANCE IMAGING |
| 1 | SCREENING | BEFORE | CONTRAST ADMINISTRATION | 2023-08-01 |
| LOW NOISE | NO MOTION DISTORTION | NO FOREIGN OBJECTS | EVALUABLE IMAGE | | 4 | DMD-RT | CV | 301 | 4 | T2 | TRANSVERSE RELAXATION TIME (T2 TIME) | | ms | 45 | 45 | ms | | | LEFT VENTRICULAR BASAL ANTEROSEPTAL SEGMENT | CARDIAC MAGNETIC RESONANCE IMAGING |
| 1 | SCREENING | BEFORE | CONTRAST ADMINISTRATION | 2023-08-01 |
| LOW NOISE | NO MOTION DISTORTION | NO FOREIGN OBJECTS | EVALUABLE IMAGE | | 5 | DMD-RT | CV | 301 | 5 | T2 | TRANSVERSE RELAXATION TIME (T2 TIME) | | ms | 40 | 40 | ms |
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| LEFT VENTRICULAR BASAL INFEROSEPTAL SEGMENT | CARDIAC MAGNETIC RESONANCE IMAGING |
| 1 | SCREENING | BEFORE | CONTRAST ADMINISTRATION | 2023-08-01 |
| LOW NOISE | NO MOTION DISTORTION | NO FOREIGN OBJECTS | EVALUABLE IMAGE | | 6 | DMD-RT | CV | 301 | 6 | T2 | TRANSVERSE RELAXATION TIME (T2 TIME) | | ms | 48 | 48 | ms |
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| LEFT VENTRICULAR BASAL INFERIOR SEGMENT | CARDIAC MAGNETIC RESONANCE IMAGING |
| 1 | SCREENING | BEFORE | CONTRAST ADMINISTRATION | 2023-08-01 |
| LOW NOISE | NO MOTION DISTORTION | NO FOREIGN OBJECTS | EVALUABLE IMAGE | | 117 | DMD-RT | CV | 301 | 117 | T1 | LONGITUDINAL RELAXATION TIME (T1 TIME) | | ms | 450 | 450 | ms | | | LEFT VENTRICULAR BASAL ANTEROSEPTAL SEGMENT | CARDIAC MAGNETIC RESONANCE IMAGING |
| 1 | SCREENING | AFTER | CONTRAST ADMINISTRATION | 2023-08-01 |
| LOW NOISE | NO MOTION DISTORTION | NO FOREIGN OBJECTS | EVALUABLE IMAGE | | 138 | DMD-RT | CV | 301 | 138 | EXTRAVOL | EXTRACELLULAR VOLUME | | % | 25 | 25 | % | | | LEFT VENTRICULAR BASAL ANTEROSEPTAL SEGMENT | CARDIAC MAGNETIC RESONANCE IMAGING |
| 1 | SCREENING | AFTER | CONTRAST ADMINISTRATION | 2023-08-01 |
| LOW NOISE | NO MOTION DISTORTION | NO FOREIGN OBJECTS | EVALUABLE IMAGE | | 1 | DMD-RT | CV | 302 | 1 | CVALL | CMR TEST RESULTS- add text aournd this - most cases would be one test. May have this occur when the participant is older, and this is how it would be known. |
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| | | | CARDIAC MAGNETIC RESONANCE IMAGING |
| 1 | SCREENING |
| CONTRAST ADMINISTRATION | 2023-08-05 |
| HIGH NOISE | YES-NOT ACCEPTABLE MOTION DISTORTION | YES FOREIGN OBJECTS | NON-EVALUABLE IMAGE |
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| Variable | Label | Type | Role | Origin |
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| CVICNOIS | Image Condition r/t Noise | text | Non-standard Record Qualifier | CRF | | CVICMOTD | Image Condition r/t Motion Distortion | text | Non-standard Record Qualifier | CRF | | CVFOIIND | Foreign Object on Image Indicator | text | Non-standard Record Qualifier | CRF | | CVOIQ | Overall Image Quality | text | Non-standard Record Qualifier | CRF |
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