[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100603352":3},{"organization":4,"armGroups":7,"interventions":18,"overallOfficials":24,"centralContacts":28,"locations":33,"responsibleParty":52,"collaborators":23,"id":54,"slug":55,"hasResults":56,"nctId":57,"briefTitle":58,"officialTitle":59,"acronym":23,"eligibilityCriteria":60,"healthyVolunteers":61,"sex":62,"minAge":63,"maxAge":64,"enrollmentInfo":65,"targetDuration":23,"studyType":68,"phases":69,"briefSummary":71,"conditions":72,"keywords":75,"overallStatus":35,"whyStopped":23,"lastUpdateSubmitDate":95,"lastUpdatePostDateStruct":96,"startDateStruct":99,"completionDateStruct":101,"leadSponsor":103,"locationsCount":104},{"fullName":5,"class":6},"University of California, San Francisco","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"Functional Residual Capacity\u002FEnd-Expiration Without Oxygen","EXPERIMENTAL","Participants will undergo abdominal MRI scans while performing breath-holding at end-expiration without oxygen supplementation. T2-weighted and MRCP sequences will be acquired during breath-hold trials.",[13],"Other: Breath-hold conditions",{"label":15,"type":10,"description":16,"interventionNames":17},"Functional Residual Capacity\u002FEnd-Expiration With Oxygen","Participants will undergo abdominal MRI scans while performing breath-holding at end-expiration with oxygen supplementation administered prior to. T2-weighted and MRCP sequences will be acquired during breath-hold trials.",[13],[19],{"type":6,"name":20,"description":21,"armGroupLabels":22,"otherNames":23},"Breath-hold conditions","Functional Residual Capacity\u002FEnd-Expiration (breath-hold technique) with\u002Fwithout oxygen to optimize MRI image quality.",[15,9],null,[25],{"name":26,"affiliation":5,"role":27},"John P Roberts, MD","PRINCIPAL_INVESTIGATOR",[29],{"name":26,"role":30,"phone":31,"phoneExt":23,"email":32},"CONTACT","415-353-3677","John.Roberts@ucsf.edu",[34],{"facility":5,"status":35,"city":36,"state":37,"zip":38,"country":39,"countryCode":40,"cosmosGeoPoint":41,"geoPoint":46,"contacts":47},"RECRUITING","San Francisco","California","94143","United States","US",{"type":42,"coordinates":43},"Point",[44,45],-122.41942,37.77493,{"lat":45,"lon":44},[48],{"name":49,"role":30,"phone":50,"phoneExt":23,"email":51},"Holland Stacey Stacey","415-420-5100","holland.stacey@ucsf.edu",{"type":53,"investigatorFullName":23,"investigatorTitle":23,"investigatorAffiliation":23,"oldNameTitle":23,"oldOrganization":23},"SPONSOR","100603352","optimizing-liver-mri-using-breath-holding-with-and-without-oxygen-100603352",false,"NCT07135401","Optimizing Liver MRI Using Breath-Holding With and Without Oxygen","Optimizing MRI Liver Imaging: Evaluating Breath-Holding Techniques and Oxygen Supplementation to Reduce Respiratory Motion Artifacts","Inclusion Criteria:\n\n* Subject must be within 18-75 years of age;\n* Subject must be able to hear and understand instructions without assistive devices;\n* Subject must provide written informed consent;\n* Subject has the necessary mental capacity to understand instructions, and is able to comply with protocol requirements;\n* Subject is able to remain still for duration of imaging procedure (approximately 30-45 minutes)\n\nExclusion Criteria:\n\n* Subjects with a weight greater than 499 lbs;\n* Subjects that have metallic\u002Fconductive or electrically\u002Fmagnetically active implants without Magnetic Resonance (MR) Safe or Magnetic Resonance (MR) Conditional labeling, with the exception of dental devices\u002Ffillings, surgical clips, and surgical staples determined to be safe for MRI scanning by a physician investigator;\n* Subjects that have implants with MR Unsafe labeling;\n* Subjects that have implants labeled as MR Conditional by the manufacturer for which the allowable conditions are not expected to be achieved by the MR environment or scan protocol;\n* Subjects who have a contraindication to MRI per the screening policy of the participating site;\n* Subjects with any respiratory or cardiovascular condition that could compromise safe breath holding;\n* Subjects who are female and pregnant",true,"ALL","18 Years","75 Years",{"count":66,"type":67},10,"ESTIMATED","INTERVENTIONAL",[70],"NA","The goal of this interventional study (clinical trial) is to learn if different breath-holding techniques, with and without extra oxygen, can improve the quality of abdominal Magnetic Resonance Imaging (MRI) images in healthy adults, ages 18-75.\n\nThe main questions it aims to answer are:\n\n* Does breath-holding at end-expiration improve image quality in abdominal MRI scans?\n* Does adding oxygen while breath-holding further reduce motion artifacts in abdominal MRI scans?\n\nResearchers will compare breath-holding with and without oxygen to see if using oxygen improves image quality during MRI scans.\n\nParticipants will:\n\n* Be pre-screened for MRI safety and trained on breath-hold procedures\n* Have one non-contrast abdominal MRI scan at the University of California San Francisco (UCSF) China Basin Imaging Center\n* Use two different breath-holding techniques during the scan, with and without oxygen\n* Complete one study visit lasting about 45 minutes to 1 hour",[73,74],"MRI","MRI Image Enhancement",[76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94],"abdominal MRI","breath-hold technique","functional residual capacity","image quality","non-contrast MRI","liver MRI","end-expiration","preoxygenation","oxygen supplementation","radiology","respiratory motion control","T2-weighted imaging","living liver donor","motion artifact","3T MRI","UCSF","motion artifact reduction","hyperventilation","end-inspiration","2026-04-07",{"date":97,"type":98},"2026-04-13","ACTUAL",{"date":100,"type":98},"2025-12-01",{"date":102,"type":67},"2026-08-01",{"name":5,"class":6},1]