Object ID: 00000018WIA305ED870GYZ
Topic ID: id_40021856 Version: 1.4
Date: May 20, 2022 10:13:53 AM

3D Heart concept

3D Heart is an improvement to three PSDs used to acquire coronary vessels using 3D gated Fiesta and 3D gated Fast GRE/SPGR and for myocardium evaluation using a 3D myocardium delayed enhancement (Fast GRE with IR-Prep and cardiac gated imaging options) acquisition. 3D Heart includes many enhancements that increase the SNR/CNR, reduce motion artifact, allow free-breathing acquisitions and, in general, improve the cardiac workflow.

3D multi-slab localizer is an application for easy whole heart or whole chest coverage and it minimizes the effect of respiratory drift and heart rate variability on image quality.
Figure 1. Slab comparison

Table 1. Image legend
Callout Description
1 Multi-SLAB. Note the improved CNR between blood and myocardium.
2 Single-SLAB
Footer CNR _{blood to myocardium} = 3.4
1 NEX with center-outer k-space ordering for increase SNR.
Figure 2. NEX comparison

Table 2. Image legend
Number Description
1 Half NEX
2 1 NEX: improved SNR is 1 NEX with center-outer k-space ordering
T2 Prep Imaging Option enabled for 3D gated Fiesta on 1.5T only.
Figure 3. T2 Prep comparison

Table 3. Image legend
Number Description
1 T2 Prep Imaging Option turned Off.
2 T2 Prep Imaging Option turned On.
MinFull TE and 1 NEX available with Slice Resolution User CV that reduces scan time and retains image sharpness
Figure 4. Slice Resolution scan parameter comparison

Table 4. Image legend
Number Description
1 Reformatted image with no Slice Resolution
2 Reformatted image with Slice Resolution = 80%
Navigator slab tracking cylindrical excitation, and multi-channel combination improve motion suppression and increase Navigator scan efficiency.
3D Fast GRE has IR Prep enabled.

Table 1. Image legend
Callout	Description
1	Multi-SLAB. Note the improved CNR between blood and myocardium.
2	Single-SLAB
Footer	CNR _{blood to myocardium} = 3.4

Table 2. Image legend
Number	Description
1	Half NEX
2	1 NEX: improved SNR is 1 NEX with center-outer k-space ordering

Table 3. Image legend
Number	Description
1	T2 Prep Imaging Option turned Off.
2	T2 Prep Imaging Option turned On.

Table 4. Image legend
Number	Description
1	Reformatted image with no Slice Resolution
2	Reformatted image with Slice Resolution = 80%

3D Fiesta allows T2 Prep, Navigator, and SPECIAL IR Fat saturation on 1.5T systems.

Number	Description
1	Trigger delay
2	Acquisition window
3	T2 Prep pulse
4	Navigator pulse
5	SPECIAL Fat saturation pulse
6	Fiesta pulse

Number	Description
1	Trigger delay
2	Acquisition window
3	IR Prep pulse
4	Navigator Tipup - an IR pulse is added with slab tracking to tipup the spins in the navigator bar region
5	Navigator pulse
6	SPECIAL Fat saturation pulse
7	Fast GRE pulse