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New MRI Technique Images Glucose in Body to Spot Tumors

June 28th, 2017 Conn Hastings Oncology, Radiology

Scientists at the German Cancer Research Center have developed a highly sensitive magnetic resonance imaging (MRI) system that can image tumors in the body, without the need for conventional contrast agents or radioactivity.

Normally, doctors often inject a contrast agent into the blood before an MRI scan. The contrast agent circulates in the blood stream and can be detected during the scan. However, it doesn’t enter the cells themselves. Nutrients like glucose, however, do. Cells absorb glucose from the blood stream and break it down for energy. However, tumor cells need lots to glucose to maintain their aggressive growth. Being able to compare levels of glucose in different areas of the body should make it easier to see certain tumors that are hungry and therefore are growing aggressively.

MRI scanners are generally tuned to see hydrogen atoms, which are found in highest concentration in water. Glucose molecules can’t be seen directly on MRI, but an effect called magnetization transfer can be harnessed to sort-of pass the glucose signal to the surrounding water. The German team was able to monitor glucose consumption within healthy tissue, as well as in brain cancer tumors by simply injecting a glucose solution and performing scans shortly thereafter.

Existing methods of detecting glucose uptake in tumors, such as positron emission tomography, involve injecting radioactive glucose. “Our glucose MRI does not require any radioactivity and therefore, does not involve any radiation exposure for the patient,” said physicist Daniel Paech, an author on the study.

Image: Visualization of brain cancer by conventional contrast agents (left) and by the glucose MRI method (right). © Paech D, et al. T1ρ-weighted dynamic glucose enhanced MRI in the human brain. Radiology (in press). © RSNA

Study in Radiology: T1ρ-weighted Dynamic Glucose-enhanced MR Imaging in the Human Brain

Via: German Cancer Research Center

Conn Hastings

Conn Hastings received a PhD from the Royal College of Surgeons in Ireland for his work in drug delivery, investigating the potential of injectable hydrogels to deliver cells, drugs and nanoparticles in the treatment of cancer and cardiovascular diseases. After achieving his PhD and completing a year of postdoctoral research, Conn pursued a career in academic publishing, before becoming a full-time science writer and editor, combining his experience within the biomedical sciences with his passion for written communication.

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