Right Ventricular Volume Estimation With Cine MRI, a Comparative Study Between Simpson's Rule and a New Modified Area-Length Method

To quantitate right ventricular(RV) volumes easily using cine MRI, we developed a new method called ”modified area-length method(MOAL method)”. To validate this method, we compared it to the conventional Simpson's rule. Magnetom H15 (Siemens) was used and 6 normal volunteers and 21 patients with various RV sizes were imaged with ECG triggered gradient echo method(FISP, TR 50ms, TE 12ms, slice thickness 9mm). For Simpson's rule transverse images of 12 sequential views which cover whole heart were acquired. For the modified area-length method, two orthogonal views were imaged. One was the sagittal view which includes RV outflow tract and the other was the coronal view defined from the sagittal image to cover the whole RV. From these images the area(As, Ac) of RV and the longest distance between RV apex and pulmonary valve(Lmax) were determined. By correlating RV volumes measured by Simpson's rule to As * Ac/Lmax the RV volume could be estimated as follows

Magnetib resonance imaging (MRI)

Cine MRI 右心室容積

Simpson法

二断面簡便法 (Modified area-length Method)