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. 2023 Feb 16;5(1):e220146. doi: 10.1148/ryct.220146

Figure 4:

Comparison of MTC-BOOST and native T2prep-bSSFP cardiac MRI. (A) Multiplanar reformatted images in a 19-year-old woman with partial atrioventricular septal defect, after repair, and severe left atrioventricular valve regurgitation. Residual respiratory motion induces blurring in the ascending aorta (blue arrowheads), left ventricle (orange arrowheads), and left main stem (yellow arrow) in the clinical T2prep-bSSFP data set. Respiratory motion is adequately resolved in the MTC-BOOST data set, with clear depiction of the aortic and left ventricular wall (purple arrowheads) and the left main coronary stem (red arrow). (B) Multiplanar reformatted images in a 19-year-old man with subaortic ventricular septal defect and aortic regurgitation secondary to aortic valve prolapse after surgical repair, who had recurrent aortic regurgitation after ventricular septal defect closure and aortic valve repair. Images were acquired in end systole because of high heart rate. Substantial luminal signal loss in the ascending aorta and right pulmonary artery was observed due to flow artifacts (blue arrows). Attenuation of the artifact in the corresponding regions in the MTC-BOOST data set enabled reliable aortic dimensioning (red arrows). (C) Multiplanar reformatted images in a 23-year-old woman with dextrocardia, situs solitus, double-outlet right ventricle, and severe pulmonary stenosis, who was palliated with Hemi-Fontan procedure. Common origin of the coronary arteries from the posterior-facing sinus is well demarcated with the MTC-BOOST sequence (red arrow). Substantial artifact from residual respiratory motion in the clinical T2prep-bSSFP data set (blue arrow) hinders diagnostic certainty. (D) Multiplanar reformatted images in a 26-year-old man with Alagile syndrome and hypoplasia of the left pulmonary artery. Residual respiratory motion in the clinical T2prep-bSSFP data set causes substantial blurring along the course of the left pulmonary artery and ascending aorta, leading to unclear measurements of the respective vascular diameters (black arrowheads). The MTC-BOOST data set resolves the respiratory motion and demarcates the aorta, as well as the proximal and distal course of the left pulmonary artery (red arrow) and its branches. Ao = aorta, Asc = ascending, CA = coronary artery, LA = left atrium, LPA = left pulmonary artery, LV = left ventricle, MPA = main pulmonary artery, MTC-BOOST = Magnetization Transfer Contrast Bright-and-black blOOd phase SensiTive, RA = right atrium, RPA = right pulmonary artery, SVC = super vena cava, T2prep-bSSFP = T2-prepared balanced steady-state free precession.

Comparison of MTC-BOOST and native T2prep-bSSFP cardiac MRI. (A) Multiplanar reformatted images in a 19-year-old woman with partial atrioventricular septal defect, after repair, and severe left atrioventricular valve regurgitation. Residual respiratory motion induces blurring in the ascending aorta (blue arrowheads), left ventricle (orange arrowheads), and left main stem (yellow arrow) in the clinical T2prep-bSSFP data set. Respiratory motion is adequately resolved in the MTC-BOOST data set, with clear depiction of the aortic and left ventricular wall (purple arrowheads) and the left main coronary stem (red arrow). (B) Multiplanar reformatted images in a 19-year-old man with subaortic ventricular septal defect and aortic regurgitation secondary to aortic valve prolapse after surgical repair, who had recurrent aortic regurgitation after ventricular septal defect closure and aortic valve repair. Images were acquired in end systole because of high heart rate. Substantial luminal signal loss in the ascending aorta and right pulmonary artery was observed due to flow artifacts (blue arrows). Attenuation of the artifact in the corresponding regions in the MTC-BOOST data set enabled reliable aortic dimensioning (red arrows). (C) Multiplanar reformatted images in a 23-year-old woman with dextrocardia, situs solitus, double-outlet right ventricle, and severe pulmonary stenosis, who was palliated with Hemi-Fontan procedure. Common origin of the coronary arteries from the posterior-facing sinus is well demarcated with the MTC-BOOST sequence (red arrow). Substantial artifact from residual respiratory motion in the clinical T2prep-bSSFP data set (blue arrow) hinders diagnostic certainty. (D) Multiplanar reformatted images in a 26-year-old man with Alagile syndrome and hypoplasia of the left pulmonary artery. Residual respiratory motion in the clinical T2prep-bSSFP data set causes substantial blurring along the course of the left pulmonary artery and ascending aorta, leading to unclear measurements of the respective vascular diameters (black arrowheads). The MTC-BOOST data set resolves the respiratory motion and demarcates the aorta, as well as the proximal and distal course of the left pulmonary artery (red arrow) and its branches. Ao = aorta, Asc = ascending, CA = coronary artery, LA = left atrium, LPA = left pulmonary artery, LV = left ventricle, MPA = main pulmonary artery, MTC-BOOST = Magnetization Transfer Contrast Bright-and-black blOOd phase SensiTive, RA = right atrium, RPA = right pulmonary artery, SVC = super vena cava, T2prep-bSSFP = T2-prepared balanced steady-state free precession.