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Figure 4 (A) In vivo axial magnetic resonance image (T2) of thoracic aorta (red arrow). Despite the cardiac and respiratory motion artifacts that affect the heart, the thoracic aorta, which is adherent to the paraspinal structures, is relatively preserved from such artifacts and is well delineated. (B) The same section magnified (see scale) showing the differentiation between lumen (white arrow) and vessel wall (green arrow). (C) In vivo axial magnetic resonance image (T2-weighted of the upper part of the abdominal aorta [red arrow]) adjacent to the diaphragm, potentially susceptible to respiratory motions, is well delineated. (D) The same section magnified (see scale) showing the differentiation between lumen (white arrow) and vessel wall (green arrow).
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