NOrmalized MAgnetization Ratio (NOMAR) filtering for creation of tissue selective contrast maps
Year: 2012
Type: article
Abstract: An MRI segmentation technique based on collecting two additional saturation transfer images is proposed as an aid for improved detection of chemical exchange saturation transfer agents. In this approach, the additional images are acquired at saturation frequencies of -12.5 and -50 ppm. Use of the ratio of these images allows differentiation of voxels with low magnetization transfer contrast (such as fat, cerebrospinal fluid, edema, or blood) from target tissue voxels using a global threshold determined by histogram analysis. We demonstrate that this technique can reduce artifacts, in vitro, in a phantom containing tubes with chemical exchange saturation transfer contrast agent embedded in either crosslinked bovine serum albumin or buffer, and in vivo for detecting diamagnetic CEST (DIACEST) liposomes injected into mice.
Source: Magnetic Resonance in Medicine
DOI: 10.1002/mrm.24271
Language: English
Subfield: Radiology, Nuclear Medicine and Imaging
Field: Medicine
Domain: Health Sciences
Open Access status: bronze
Awards: Multi-Color Exchange Transfer Imaging of Drug Delivery Nanocarriers, G2063293639, Novel approaches for CEST labeling, detection, quantification and translation, Resource for Quantitative Functional FMRI, JHU ICMIC Program, DIACEST Islet Cell Capsules for Immunoprotection, MR Detection, and pH Sensing
OpenAlex ID: W2071266108