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(SMEs add content and update the text below. Thank you.)

Parametric Mapping is a way to measure relaxation time for longitudinal and transverse relaxation time along with extracellular volume.

"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? one is longitudinal relaxation time and the other is transverse relaxation time.  The results vary by the physics of the MRI. It shows how the protocns relax after a period of excitation. 1.5 Tesla has a different constant than for another type of scanner. It detects edema/fibrosis.  Transverse relaxation time - under 49 change to 40 to 50; 50,60 is high.
  2. Do we need minimum and maximum values? for SI mean, area, circumference, SI mean, SI min/max?- will change depending on the (also changes after contrast)- NA; in the context of research do they collect this - no. Not relevant.
  3. For extracellular volume - use percent. Normal is under 28.5%; Abnormal is in the mid 30%; mid 20% 

  4. Post contrast longitudinal relaxation time is 400s to 500s

  5. Post contrast transverse relaxation time is not done


Stopped here -

  1. Do we need timepoints for the T1 measurement or just the point in time of the final assessment?
  2. 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)
  3. 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?
  4. 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?
  5. For the location does the intracellular compartment need to be noted? (myocytes, fibroblasts, endothelial cells, smooth muscle cells)
  6. 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)
  7. 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 parametric mapping (T1 mapping, T2 mapping, and extracellular volume) results for USUBJID 301. For brevity, after contrast a limited sample of tests were shown in this example.


The PR dataset shows the procedure of cardiac magnetic resonance imaging using the device associated with SPDEVID ABC001 and the PRREFID of 12345678. This information shows what CMR device is used for the procedure and the accession number or procedure reference identifier associated with the specific procedure for USUBJID 301.

pr.xpt

pr.xpt

Row

STUDYID

DOMAIN

USUBJID

SPDEVID

PRSEQ

PRREFID

PRLNKID

PRTRT

PRSTDTC

1

DMD-RT

PR

301

ABC001

1

12345678

04

CARDIAC MAGNETIC RESONANCE IMAGING

2023-08-01

$warningHtml
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.

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

45

ms4545ms

LEFT VENTRICULAR BASAL ANTEROSEPTAL SEGMENT

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

Pre-contrast

40

ms4040msLEFT VENTRICULAR BASAL INFEROSEPTAL SEGMENTCARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
6DMD-RTCV3016T2TRANSVERSE RELAXATION TIME

Pre-contrast

48

ms4848msLEFT 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

450

ms450450ms

LEFT VENTRICULAR BASAL ANTEROSEPTAL SEGMENT

CARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
12DMD-RTCV30112
NATIVE T1 MAPPINGPost-contrast840ms

840

840ms
CARDIAC MAGNETIC RESONANCE IMAGING
1SCREENING2023-08-01
13DMD-RTCV30113EXTRAVOLEXTRACELLULAR VOLUME

Post-contrast

25

%2525%

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
DI holds the device identifier information that describes the device used to produce the image that was the basis of the interpretation recorded in the CV domain. Characteristics in DI are those necessary to identify each device to the level of granularity necessary for the study (e.g., to the model level if knowing the actual unit is not necessary, to the serial number level if there is a need to distinguish among units).

di.xpt

di.xpt

Row

STUDYID

DOMAIN

SPDEVID

DISEQ

DIPARMCD

DIPARM

DIVAL

1

DMD-LGE

DI

ABC001

1

DEVTYPE

Device Type

CMR Scanner

2

DMD-LGE

DI

ABC001

2

MANUF

Manufacturer

ACME

3

DMD-LGE

DI

ABC001

3

TRADENAM

Trade Name

ACME 64

4

DMD-LGE

DI

ABC001

4

MODEL

Model Number

CMR540

$warningHtml
Fixed properties of devices identified in DI are represented in the DO domain. The sponsor chose to keep the software version constant throughout the study. DO should contain properties that are important for interpreting the data. 

do.xpt

do.xpt

Row

STUDYID

DOMAIN

SPDEVID

DOSEQ

DOTESTCD

DOTEST

DOORRES

DOORRESU

1

DMD-LGE

DO

ABC002

1

SFTWRNAM

Software Name

CMRRLXU2


2

DMD-LGE

DO

ABC002

2

SFTWRVER

Software Version

CMRLX.2


3

DMD-LGE

DO

ABC002

3IMAQDIMImage Acquisition Dimensionality3
$warningHtml
Changeable properties and parameters of the devices identified in DI are represented in the DU domain. These settings could be linked to the record in the CV domain by their shared SPDEVID and DTC values. For the sake of brevity, only 1 subject's parameters are shown. For more information on relating records, see SDTMIG v3.4 Section 8.2, Relating Peer Records. 

du.xpt

du.xpt

Row

STUDYID

DOMAIN

USUBJID

SPDEVID

DUSEQ

DUREFID

DUTESTCD

DUTEST

DUORRES

DUORRESU

DUSTRESC

DUSTRESN

DUSTRESU

DUDTC

1

DMD-LGE

DU

301

ABC001

1

12345678

ANTPLANEAnatomical PlaneSAGITTAL
SAGITTAL

2020-02-21

2

DMD-LGE

DU

301

ABC001

2

12345678

INTDISTM

Interslice Distance

1mm11mm

2020-02-21

3

DMD-LGE

DU

301

ABC001

3

12345678

STHICKSlice Thickness1mm11mm

2020-02-21

4

DMD-LGE

DU

301

ABC001

4

12345678

PIXSPCXX-axis Pixel Spacing2mm22mm

2020-02-21

5

DMD-LGE

DU

301

ABC001

5

12345678

PIXSPCYY-axis Pixel Spacing2mm22mm

2020-02-21

6

DMD-LGE

DU

301

ABC001

6

12345678

AQMTRXSZImage Acquisition Matrix Size256X256VOXEL256X256256X256VOXEL

2020-02-21

7

DMD-LGE

DU

301

ABC001

7

12345678

FLDVIEWField of View280X280mm280X280280X280mm

2020-02-21

8

DMD-LGE

DU

301

ABC001

8

12345678

NUMSLICENumber of Slices125
125125

2020-02-21

9

DMD-LGE

DU

301

ABC001

9

12345678

ATTCRCTAttenuation Correction TypeFBP
FBP

2020-02-21

10

DMD-LGE

DU

301

ABC001

10

12345678

DECCORRDecay Correction IndicatorN
N

2020-02-21

11

DMD-LGE

DU

301

ABC001

11

12345678

RANDCORRRandoms Correction IndicatorN
N

2020-02-21

12

DMD-LGE

DU

301

ABC001

12

12345678

RECONDATReconstruction of Raw Data TypeITERATIVE
ITERATIVE

2020-02-21

$warningHtml
$titleHtml

relrec.xpt

Row

STUDYID

RDOMAIN

USUBJID

IDVAR

IDVARVAL

RELTYPE

RELID

1

DMD-LGE

PR


PRLNKID


ONE

04

2

DMD-LGE

CV


CVLNKID


MANY

04

3

DMD-LGE

AG


AGLNKID


ONE

04

$warningHtml

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