MRI machines typically support weights of up to around 400 pounds. Some scanners max out at closer to 300 pounds. CT scanners tend to have weight limits that hover around 450 pounds. X-ray tables, used in procedures that require the patient to lie prone, have a wide variety of weight limits.Click to see full answer. Likewise, what is the maximum weight for an MRI scan?”Patients who require a conventional MRI scan should fall within certain parameters, the scanner table holds a maximum weight of 25 stone and the bore of a conventional MRI scanner is 68 inches.” can an obese person have an MRI? Morbidly obese patients often do not fit on magnetic resonance imaging (MRI) or computed tomography (CT) scanning tables, and layers of fat may reduce the quality of ultrasound and X-ray images. A high body mass index also influences B-type natriuretic peptide (BNP) cut-points in the diagnosis of heart failure. Also know, will I fit in an MRI machine? MRI scanners tend to have a lower weight limit and smaller gantry, while CT machines are slightly larger. “The most common point at which hospitals get into an issue, is when the patient can’t fit into the CT scanner,” Uppot said. They come in, and we scan them for an answer,” he said.Is there a weight limit for CT scan?First and Foremost – What is The Weight Limit for a Typical CT Scanner? Most CT scanners can support no more than 450 pounds. This should be adequate to support the weight of 99 percent of your patients. However, there are patients who exceed this weight limit who are in need of CT scans.