Purpose
Cardiac MR (CMR) has evolved as the non-invasive reference standard for accurate and highly reproducible determination of cardiac function and myocardial viability.
The introduction of open high-field (HFO) MR scanners offers advantages such as a greater feasibility of conducting exams on patients with claustrophobia,
patients who are obese,
and children.
Therefore,
the aim of our study was to evaluate CMR imaging of patients with heart disease acquired with an open 1.0-T MR scanner and compare them to CMR images of patients taken with a standard...
Methods and Materials
200 patients (127 m) with a mean age of 52±18 years (mean±standard deviation) with cardiac diseases were reviewed consecutively on a Philips scans: open 1.0 T with 26-mT/m,
using 8-channel or a 3-channel phased array coil depending on the patient’s size,
and on 1.5 T with a 33-mT/m,
using a 5-channel phased array coil.
In cine,
T1,
delayed enhancement (DE) and short time inversion recovery (STIR) sequences SNR and CNR were calculate and an image quality score,
using a 3-point grading scale [3 excellent; 1...
Results
Image quality show a significant difference for two sequence types,
cine and STIR,
both at 1.0 T and 1.5T (cine p=0.012; STIR p=0.003),
alternately,
for STIR and DE sequences,
no significant differences were found (DE: p=0.685; T1: p=0.157).
The median SNR achieved,
using the cine and DE and STIR sequences,
were more than doubled by 1.5T in oppose to 1.0T,
and had a significant difference on the CNR for the cine and DE (p<0.001) apart the STIR sequences (p=0.414).
Using the T1 sequences there weren’t...
Conclusion
Image quality in comparison between the open and closed-bore MRI was generally lower in regard to SNR and CNR,
but however satisfactory in regarding of the quality image score.
