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    • MR Contrast

Atrial Septal Defect - ASD (rev. 10/17/19)

Indication: Detection, shunt fraction calculation (Qp/Qs), defect measurement for treatment planning

SEQUENCES

Localizer

Axial bright blood chest

Coronal bright blood chest

Axial dark blood chest

2 chamber CINE

Fake short axis CINE

4 chamber CINE

4 chamber CINE STACK WHOLE HEART (TrueFISP, 0                 spacing) - consider GRE to view ASD jet

Short axis stack ATRIA CINE (TrueFISP, 0 spacing)

RVOT CINE

PA CINE

Main PA Through Plane Phase Contrast (VENC 120)

Right PA Through Plane Phase Contrast (VENC 90)

Left PA Through Plane Phase Contrast (VENC 90)

Atrial Septum In Plane Phase Contrast (HLA, VENC 50)

Atrial Septum Through Plane Phase Contrast (VENC 50)

3 chamber CINE

Coronal LVOT CINE

Aorta STJ Through Plane Phase Contrast

-- CONTRAST--

Multislice first past perfusion (4 ch and atrial SA)

+/- Coronal isotropic high res TWIST angio

LV short axis stack CINE

TI scout

MDE segmented SAS

MDE segmented 2 chamber

MDE single shot 4 chamber

MDE single shot 3 chamber

3D MDE (Short Axis and 4 chamber)

NOTES:


4 chamber CINE STACK WHOLE HEART GRE

0 spacing

Purpose: to visualize turbulent jet through atrial septum


Short axis stack ATRIA CINE

0 spacing

perpendicular to atrial septum on 4 chamber view

3 point plan to track with angled atria


Atrial septum In Plane PC

Purpose: to visualize jet

Horizontal Long Axis view (~4 chamber)

Copy from best 4 Chamber CINE in the stack that shows the ASD


Atrial septum Through Plane PC

Purpose: calculate flow through ASD

prescribe parallel to interatrial septum, using 4 chamber STACK 3 point plan

+/- Isotropic (high res) Coronal TWIST angio

Purpose: look for anomalous pulmonary veins


First Past Perfusion

3 or 4 slices through ASD

-two best 4 chamber and two best short axis