You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 24 Next »

"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.

  1. What is the difference between T1 and T2? Should there be any differences in the data collected for each of these?
  2. Do we need minimum and maximum values? for SI mean, area, circumference, SI mean, SI min/max?
  3. Do we need timepoints for the T1 measurement or just the point in time of the final assessment?
  4. Does Cardiac Motion correction need to be indicated? If yes, does the type need to be indicated (such as the modified LL (MOLLI) sequence)?  If yes, should this be reflected on each result? (Alana/Jon/Diane - I am considering a "Cardiac Motion Correction Indicator" NSV)
  5. Do we need a postcontrast indicator since those measurement differ? or is that what the terms "native T1" (no contrast) and "post-contrast T1" (after contrast) mean?
  6. Three is a "gold" standard noted as the "T1 mapping based on the acquisition of single images by a T1 turbo spin-echo sequence". It is noted as the ultimate T1 mapping method. Does the method need to be called out by what kind of acquisition sequence was used?
  7. For the location does the intracellular compartment need to be noted? (myocytes, fibroblasts, endothelial cells, smooth muscle cells)
  8. Does the cardiac phase for the specific T1 segment need to be noted? (atrial systole-diastole; isovolumentric contraction-diastole; rapid ejection-systole; reduced ejection-systole; isovolumetric relaxation-diastole; rapid ventricular filling-diastole)
  9. Is it important to record the "MRI scanner type" (Avanto, Siemens; Best, Philips; Acheiva, Philips), the "reception coil" (16-channel; 32-channel), "the T1 mapping sequence" (MOLLI; ShMOLLI)

The following example shows the T1 mapping results for USUBJID 301. For brevity, after contrast only one of each test was shown in this example.

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 11-14:Show the T1 Longitudinal Relaxation Time, the T2 Transverse Relaxation Time, Native T1 Mapping, and Extracellular volume for different segments of the heart after contrast for CMR.

cv.xpt

cv.xpt

Row

STUDYID

DOMAIN

USUBJID

CVSEQ

CVTESTCD

CVTEST

CVCAT

CVORRES

CVORRESU

CVSTRESC

CVSTRESN

CVSTRESU

CVLOC

CVMETHOD

CVLOBFXL

VISITNUM

VISIT

CVDTC

1DMD-RTCV3011T1LONGITUDINAL RELAXATION TIME

Pre-contrast

1315

ms

1315

1315ms

LEFT VENTRICULAR BASAL ANTEROSEPTAL SEGMENT

CARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
2DMD-RTCV3012T1LONGITUDINAL RELAXATION TIMEPre-contrast1166ms11661166msLEFT VENTRICULAR BASAL INFEROSEPTAL SEGMENTCARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
3DMD-RTCV3013T1LONGITUDINAL RELAXATION TIME

Pre-contrast

980

ms

980

980msLEFT VENTRICULAR BASAL INFERIOR SEGMENTCARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
4DMD-RTCV3014T2TRANSVERSE RELAXATION TIME

Pre-contrast

962

ms

962

962

ms

LEFT VENTRICULAR BASAL ANTEROSEPTAL SEGMENT

CARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
5DMD-RTCV3015T2TRANSVERSE RELAXATION TIME

Pre-contrast

976

ms

976

976

msLEFT VENTRICULAR BASAL INFEROSEPTAL SEGMENTCARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
6DMD-RTCV3016T2TRANSVERSE RELAXATION TIME

Pre-contrast

985

ms

985

985msLEFT VENTRICULAR BASAL INFERIOR SEGMENTCARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
7DMD-RTCV3017
NATIVE T1 MAPPINGPre-contrast1070ms

1070

1070ms
CARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
8DMD-RTCV3018EXTRAVOLEXTRACELLULAR VOLUME

Pre-contrast

1.5

/s

1.5

1.5/s

LEFT VENTRICULAR BASAL ANTEROSEPTAL SEGMENT

CARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
9DMD-RTCV3019EXTRAVOLEXTRACELLULAR VOLUME

Pre-contrast

1.2

/s

1.2

1.2/sLEFT VENTRICULAR BASAL INFEROSEPTAL SEGMENTCARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
10DMD-RTCV30110EXTRAVOLEXTRACELLULAR VOLUME

Pre-contrast

1.1

/s

1.1

1.1/sLEFT VENTRICULAR BASAL INFERIOR SEGMENTCARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
11DMD-RTCV30111T1LONGITUDINAL RELAXATION TIME

Post-contrast

1015

ms

1015

1015ms

LEFT VENTRICULAR BASAL ANTEROSEPTAL SEGMENT

CARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
12DMD-RTCV30112T2TRANSVERSE RELAXATION TIME

Post-contrast

750

ms

750

750

ms

LEFT VENTRICULAR BASAL ANTEROSEPTAL SEGMENT

CARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
13DMD-RTCV30113
NATIVE T1 MAPPINGPost-contrast840ms

840

840ms
CARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
14DMD-RTCV30114EXTRAVOLEXTRACELLULAR VOLUME

Post-contrast

1.1

/s

1.1

1.1/s

LEFT VENTRICULAR BASAL ANTEROSEPTAL SEGMENT

CARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
$warningHtml

Dataset Wrapper Debug Message

Please add a row column to your dataset.

The AG dataset shows the Gadolinium based contrast that was used for the procedure. In this example, the researchers did not collect the time of the contrast.

ag.xpt

ag.xpt

Row

STUDYID

DOMAIN

USUBJID

AGSEQ

AGTRT

AGCAT

AGDOSE

AGDOSU

AGDOSFRM

AGROUTE

AGSTDTC

1

DMD-LGE

AG

301

1

Gd-DOTA

CONTRAST AGENT

8

mL

SOLUTION

INTRAVENOUS

2023-08-01

$warningHtml

  • No labels