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Aortic regurgitation

Case Study
Flamm, Scott, M.D. Cleveland Clinic USA

Patient history

A 62-year-old male with a history of shortness of breath for 2 years, presented for an MR examination at the Cleveland Clinic, Ohio, USA.

MR examination

MRI was performed using an Achieva 1.5T XR scanner with the SENSE XL Torso coil.

 

Single-shot SSFP and half Fourier acquired single-shot turbo spin echo (ssTSE) images were acquired to delineate the anatomy.

 

Cine SSFP images were then acquired in multiple orientations to characterize aortic motion and size.

 

Through-plane velocity encoded phase contrast images were acquired in a plane perpendicular to the mid ascending aorta, at the level of the main pulmonary artery, in order to quantify aortic flow and regurgitation.

 

All images were acquired with retrospective VCG gating during short (typically 8-14 second) breath holds, except the ssTSE images which were acquired with respiratory triggering during free breathing.

 

 

ExamCard used:

Images

 

The coronal oblique view shows moderate jet of aortic regurgitation (red arrow) ino the left ventricle. In addition, there is mild dilatation of the ascending aorta.

 

 

The phase contrast study performed at the mid ascending aorta (red circular region of interest) is used to quantify the severity of the aortic regurgitation. In this patient, the regurgitation fraction was 27%, identified as flow below the baseline (blue line) during diastole.

 

Diagnosis

Moderate aortic regurgitation.

Clinical impact of using Achieva 1.5T XR

The Achieva 1.5T XR helped to identify and determine aortic regurgitation. In addition, it also enabled evaluation of the aortic dilation.

 

Even when the Achieva XR is running at 1.5T, it has the gradient capabilities of a 3.0T scanner. This allows shorter TRs and TEs and, as a result, in the same breath hold, accomplishes imaging that has higher spatial resolution, higher temporal resolution, or both. Another advantage of the Achieva 1.5T XR are the shorter scan times, reducing examination times.

 

The additional flow quantification images, using the Achieva 1.5T XR, are acquired with good reproducibilty, within a single breath hold, and with retrospective gating to cover the entire cardiac cycle.

 

The integration of ExamCards with the Extended Workspace (EWS) is particularly advantageous. With the customizable display protocols and the tight integration with the EWS display protocols, series of long and short axis images can be displayed on a single screen and all be synchronized.

 

 

Related information:



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Apr 30, 2010

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Case Study
Achieva 1.5T XR
Release 2.6
Quasar Dual
Aorta, Cardiac, Cardiac Morphology, Function Cine, Function Non-Cine
 

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