• Object ID: 00000018WIA309C1970GYZ
  • Topic ID: id_40024605 Version: 1.2
  • Date: Mar 15, 2022 3:22:46 PM

T1 Map scan protocol considerations

Consider these tradeoffs as you change scan parameters for images that are post processed with the T1 Map protocol.

Table 1. T1 Map protocol example
Scan parameters1.5T ValueConsiderations
TRN/A*TR cannot be selected. It depends on other scan parameters such as FOV, slice thickness, frequency matrix, flip angle, etc. Adjust these other parameters so that the TR < 4 ms.
TEN/ATE cannot be selected.
Flip angle with IR Prepared35Flip angle value is SAR limited. Adjust based on TR considerations.
Flip angle with SR Prepared65Flip angle value is SAR limited. Adjust based on TR considerations.
Bandwidth100Select the largest BW to obtain the shortest TR.
Field of ViewBased on patient sizeAdjust the size to cover the chest area and TR considerations.
Slice thickness7-10 mmAdjust based on coverage and spatial resolution considerations.
Slice spacing0Adjust based on coverage considerations.
Frequency160Adjust based on TR considerations.
Phase148Adjust based on scan time.
PlaneAny planeTypically, the T1MAP plane matches the short axis view of the heart. A maximum of 10 slice per series can be prescribed
Imaging optionsSR Prepared or IR Prepared

ASSET Acceleration factor = 2

Select IR Prepared to provide limited accuracy but high precision due to the high dynamic range of inversion recovery (IR). The results can vary and are dependent on imaging parameters and the patient's heart rate.

Select SR Prepared to provide excellent accuracy but lower precision due to the lower dynamic range of saturation recovery (SR). The results should be independent of imaging parameters and heart rate.

Acceleration factor of 2 reduces the scan time so that cardiac motion is minimized and images are sharper.

Cardiac Tab#RR interval: 1

Trigger Delay: Diastolic

Trigger Window: 15%

The Diastolic Trigger delay minimized cardiac motion.

* Not Applicable