Author + information
- Amita Singh,
- Keigo Kawaji,
- Roderick Tung,
- Karima Addetia,
- Noreen Nazir,
- Akhil Narang,
- Javed Zaidi,
- Ginny O'Keefe Baker,
- Roberto Lang and
- Amit Patel
Background: Severe susceptibility artifacts (SA) limit the use of cardiac magnetic resonance (CMR) in patients with implantable cardioverter defibrillators (ICDs). The use of a previously developed wideband (WB) late gadolinium enhancement (LGE) technique may ameliorate these artifacts. We sought to determine the rate of SA in patients with ICDs using standard LGE, and whether the WB LGE approach improves image quality.
Methods: 15 consecutive patients with ICDs referred for CMR (Philips, 1.5T) were included in this study. Using the WB protocol, the frequency offset associated with minimal SA was determined prior to contrast administration. LGE images were obtained using the standard approach and the WB LGE approach including the best frequency offset. For each patient, the number of left ventricular (LV) slices with a SA was determined for both approaches.
Results: Of 15 patients enrolled in the study, 6 were excluded due to claustrophobia or an unrelated imaging problem. In the remaining 9 subjects a total of 144 LV slices were analyzed. The standard LGE approach had significantly more LV slices per patient with SA (figure) than the WB LGE approach (3.5 ±3 vs 0.22 ± 0.4, p=0.002). On the standard LGE images, SA was encountered in the mid anterior wall (56%), basal and apical anterior wall (44%) and apical anterolateral wall (22%).
Conclusions: SA are commonly present on standard LGE images in patients with an ICD. The WB LGE protocol essentially resolves the presence of these susceptibility artifacts.
Poster Hall, Hall C
Friday, March 17, 2017, 3:45 p.m.-4:30 p.m.
Session Title: Non Invasive Imaging: MR Heart Failure and Pulmonary Hypertension
Abstract Category: 29. Non Invasive Imaging: MR
Presentation Number: 1158-197
- 2017 American College of Cardiology Foundation