Developing a new measure of small bowel peristalsis with dynamic MR: a proof of concept study

Abstract

It is possible to develop a new measure, based on automated segmentation of mean signal amplitude changes, of small bowel peristalsis using dynamic MR.

Motility mapping as evaluation tool for bowel motility: Initial results on the development of an automated color‐coding algorithm in cine MRI

“…The method is valuable as an additional diagnostic reference in combination with static MRI. Additionally, compared to other methods , our method is fast to execute, with only slightly prolonged examination times for each patient. Breathing artifacts during dynamic image acquisition were reduced by restricted motion correction in the cranio‐caudal direction.…”

“…Previous studies validated their techniques by comparison with manual measurements and subjective visual assessments or by using a phantom . Our standard reference was based on pathologic findings in static MRI.…”

“…The particular aim was to observe the global intestine and not only selected parts. Although there are promising techniques for assessing global small bowel motility (15,(17)(18)(19)21), to our knowledge there is no study showing a technique applicable in daily routine. The approach presented allows for sum-marizing of different motility areas of the whole intestine in an easily readable color picture (motility map).…”

“…Previous studies using subjective criteria detecting bowel motility abnormalities in patients with Crohn's disease (CD) showed the advantages of cine MRI as a supportive tool in the depiction and monitoring of CD (11)(12)(13). In recent studies, increasing effort has been made to develop objective and automated measurement tools to assess bowel motility (14)(15)(16)(17)(18)(19)(20)(21). However, in contrast to clinically established software for cine MRI in cardiac imaging, eg, Argus (Siemens, Erlangen, Germany), there is a lack of an objective, comprehensive, and practicable evaluation tool for routine diagnostics of bowel motility.…”

Global Small Bowel Motility: Assessment with Dynamic MR Imaging

“…advances in magnetic resonance (MR) imaging hardware and software now enable real-time acquisition of dynamic volumetric cine loops that depict small bowel motion with high temporal resolution. Subjective assessment of motility by radiologists can be standardized by means of computational postprocessing that provides potential quantitative measurements of both local segmental and global bowel motion (10)(11)(12)(13)(14). One such software program has been validated (10) and investigated in the context of Crohn disease (15).…”