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Figure 3c. Measurement of the short axes of the RV and LV on a reformatted four-chamber CT image obtained in a 54-year-old patient with nonsevere PE. Dashed lines on sagittal (a) and coronal (b) CT images of the heart are rotated to obtain the four-chamber image (c). The short axes of the RV and LV are 44.7 mm and 45.6 mm, respectively, resulting in a normal RV/LV diameter ratio of less than 1.
