Comparison of right ventricular volume measurements obtained using transaxial and short-axis slices acquired by cardiac MRI in patients with chronic thromboembolic pulmonary hypertension
Rieko Ishimura 1 , Kenich Yokoyama 1 , Toshiya Kariyasu 1 , Shigehide Kuhara 2 , and Toshiaki Nitatori 1
department of radiology, Kyorin University,
Mitaka, Tokyo, Japan,
medical systems, Otawara, Tochigi, Japan
Severe pulmonary hypertension(PH) causes significant
dilatation of the right ventricle(RV), and the
compensatory hypertrophy of the trabeculae carneae in
response to PH leads to severe deformation of the RV.
This deformation makes it difficult to identify the
anatomical positions of the tricuspid valve and
pulmonary valve in CMR imaging. TAX image is more
difficult to identify of the interface between the blood
within the cardiac chambers and the myocardium due to
partial volume effects. In patients with diseases
associated with deformation of RV, such as CTEPH, SAX
images may be more useful than TAX images for right
heart functional analysis.
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