Contrast enhanced MRA with CAPR (Cartesian Acquisition with Projection like Reconstruction) technique - review of initial clinical experience

Abstract

Background Contrast enhanced MRA is a well validated and widely used technique for noninvasive vascular imaging. Significant advances in coil development, parallel imaging, and view-sharing techniques can enable imaging with very high spatial and/or temporal resolution which can be tailored to very specific or problematic clinical situations. Cartesian acquisition with projection like reconstruction (CAPR) is a specific technique developed by our MR Research laboratory which supports very high acceleration factors and has been adopted into clinical practice for a number of clinical scenarios. We will present a brief introduction to the technique and an illustrative review of our early clinical experience using CAPR for clinical imaging.

4D Contrast-enhanced MR Angiography with the Keyhole Technique in Children: Technique and Clinical Applications

“…The various MR imaging equipment vendors use slightly different approaches to the undersampling of k-space, but the basic premise remains the same; namely, different portions of k-space are sampled at different rates to achieve a reduction in imaging time. Algorithms used by the different vendors include time-resolved imaging with stochastic trajectories (TWIST; Siemens Healthcare, Malvern, Pa), time-resolved imaging of contrast kinetics (TRICKS; GE Healthcare, Little Chalfont, UK), k-t broad-use linear acquisition speed-up technique (k-t BLAST; Philips Healthcare), and cartesian acquisition with projection-like reconstruction (CAPR) (13)(14)(15)(16)). The clinical applications described in this article would apply to these techniques as well, although the implementation for each technique would be slightly different from the keyhole technique.…”