MultidetectorCT angiography (CTA) and MR angiography (MRA) are well-established non-invasiveimagingtechniques for the differential diagnosis of pulmonary hypertension (PH). CTA is considered as a gold standard for the diagnosis of pulmonaryembolism,
but this method is accompanied with the radiation exposure and use of iodinated contrast media. MRA is a promising technique for the patients with PH.
Few studies to date have sought to determine the accuracy of MRA in diagnosis of...
Methods and Materials
Study populations consisted of 10 patients (m/f -3/7; mean age – 34.5+-3.1) with CTEPH.
CTA and MRA were performed in all the patients. CTA was performed at64-row scanner using dual-energy mode (GSI technique).
The volume of the injected contrast medium was 40-7 0ml. MRA was performed at1,5T MR system using 10-15 ml of contrast agent (1 mmol/ml).
3-5 ml of contrast agent injected at 2,5 ml/sec were used for the dynamic perfusion study.
After that CMR protocol for PH patents was implemented...
All the patients had CTEPH.
Patients data are presented in Table 1. Table 1.
Patients data Parameter Value Age (y.o.) 48.5±3.1 Mosaic attenuation pattern 10 (10) Diameter of PA (mm) 33±7.6 PA/Ao diameter ratio 1,13±0,2 RV/LV diameter ratio 1,28±0,38 Collateral branches 7 (10) PA occlusion (MRA) 55 (131) – 42 % PA occlusion (CTA) 56 (131) - 42,
7 % PA stenosis (MRA) 39 (131) - 29,7 % PA stenosis (CTA) 48 (131) - 36,6 % In total 131 segmental PA branches and 131 lung segments were included in...
Pulmonary MRA has a high diagnostic value in the patients with CTEPH.
It is suitable for the assessment of pulmonary vessel morphology and pulmonary perfusion.
It can serve as an alternative to CTA.
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