Cardiovascular magnetic resonance in pulmonary hypertension

Table 3 Suggested Imaging Protocol in PH

Sequence	Objective	Slice
		Prescription	Parameters
Localisers	Identify the position of the heart	Sagittal, coronal and axial planes
Cines	Define axes of both ventricles and the great arteries	HLA, VLA, SAX stack, LVOT, LVOT cross cut, RV VLA, MPA, MPA cross cut	Retrospectively gated, steady state free procession, slice thickness 7 mm, interslice gap 3 mm, FOV read 340 mm, FOV phase 75 mm
Flow Measurements	To determine stroke volume through main pulmonary artery and aorta	MPA/Ao	Retrospectively gated,2D segmented Spoiled Gradient Echo sequence. Slice thickness 10 mm, FOV read 350 mm, FOV phase 100 mm
Magnetic Resonance Angiography	To assess the pulmonary arterial tree	Ensure coverage of the lung vasculature	Non-ECG gated 3D Spoiled Gradient Echo sequence, slice thickness 1.30 mm, FOV read 400 mm, FOV phase 100 mm
Late Gadolinium Enhancement	To exclude areas of infarction and determine the degree of insertion region enhancement	Short axis stack and long axis acquisitions	2D segmented Spoiled Gradient Echo sequence with non-selective inversion pulse sequence. Slice thickness 8 mm, FOV read 340 mm, FOV phase 75 mm. LGE TI 260 mm initially then alter accordingly

HLA; horizontal long axis, VLA; vertical long axis, SAX; short axis, LVOT; left ventricular outflow tract, RV; right ventricular, MPA; main pulmonary artery, Ao; aorta, FOV; field of view, LGE; Late Gadolinium Enhancement, TI, inversion time.

ISSN: 1532-429X