title: Endoluminal contrast for abdomen and pelvis magnetic resonance imaging.
abstract: Magnetic resonance (MR) imaging of the abdomen and pelvis can be limited for assessment of different conditions when imaging inadequately distended hollow organs. Endoluminal contrast agents may provide improved anatomic definition and detection of subtle pathology in such scenarios. The available routes of administration for endoluminal contrast agents include oral, endorectal, endovaginal, intravesicular, and through non-physiologic accesses. Appropriate use of endoluminal contrast agents requires a thorough understanding of the clinical indications, available contrast agents, patient preparation, and interaction of the contrast agent with the desired MR imaging protocol. For example, biphasic oral enteric contrast agents are preferred in MR enterography as their signal properties on T1- and T2-weighted imaging allow for evaluation of both intraluminal and bowel wall pathology. In specific situations such as with MR enterography, MR defecography, and accurate local staging of certain pelvic tumors, the use of an endoluminal contrast agent is imperative in providing adequate diagnostic imaging. In other clinical scenarios, the use of an endoluminal contrast agent may serve as an indispensable problem-solving tool.
authors.affiliation: Department of Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390-9085, USA.
authors.forename: Mohit K
authors.initials: MK
authors.lastname: Gupta
authors.affiliation: Department of Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390-9085, USA.
authors.forename: Gaurav
authors.initials: G
authors.lastname: Khatri
authors.affiliation: Department of Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390-9085, USA.
authors.forename: April
authors.initials: A
authors.lastname: Bailey
authors.affiliation: Department of Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390-9085, USA.
authors.forename: Daniella F
authors.initials: DF
authors.lastname: Pinho
authors.affiliation: Department of Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390-9085, USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Costa
authors.affiliation: Department of Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390-9085, USA. ivan.pedrosa@utsouthwestern.edu.|Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, TX, USA. ivan.pedrosa@utsouthwestern.edu.
authors.forename: Ivan
authors.initials: I
authors.lastname: Pedrosa
mesh_terms: D000005:Abdomen / Q000000981:diagnostic imaging*; D003287:Contrast Media; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D010388:Pelvis / Q000000981:diagnostic imaging*
chemical_list: D003287:Contrast Media
keywords: Endoluminal contrast; GI imaging; GU imaging; Magnetic resonance imaging