Image courtesy of Imago Systems Tc-99m MDP bone scan (left) is negative for osseous lesions. NaF/FDG PET/MRI (right and second slide) confirms absence of bone metastases, but shows liver metastases. Image courtesy of Stanford University.June 20, 2017 — Simultaneous injections of the radiopharmaceuticals fluorine-18 fluorodeoxyglucose (18F-FDG) and 18F-sodium fluoride (18F-NaF) followed by quantitative scanning significantly improves image quality and detection of bone metastases at a lower dose, according to new research. The research was presented at the 2017 Annual Meeting of the Society of Nuclear Medicine and Molecular Imaging (SNMMI), June 10-14 in Denver.”For certain patients with breast and prostate cancer who require evaluation of metastatic disease, a single PET/MR [positron emission tomography/computed tomography] exam can provide more accurate information with less radiation dose in one procedure that is more convenient for patients and potentially less costly for the healthcare system,” said Andrei Iagaru, M.D., associate professor of radiology and division chief, Nuclear Medicine and Molecular Imaging, Stanford University School of Medicine in Stanford, Calif.Dual-agent PET/MR is further supported by time of flight, a quantitative feature of modern PET image reconstruction that approximates the position where photons are created as radioactive agents decay, which translates into finer image quality.For this study, researchers prospectively enrolled 55 cancer patients — 39 men with prostate cancer and 17 women with breast cancer, ages 34 to 85, in line for conventional bone scan to determine the spread of their disease. All participants were administered simultaneous injections of the imaging agent 18F NaF for the evaluation of bone turnover and FDG for increased metabolic activity and/or inflammation.After injection, scientists performed PET/ MRI scans with time of flight capability and compared the results with conventional technetium 99m-methyl diphosphonate (99mTc MDP) bone scintigraphy. Results of the study showed improved detection of prostate and breast cancer that had metastasized to bone. Dual-agent PET/MR pointed to bone metastases in 22 patients who were also found positive for metastases with conventional bone scan. In addition, PET/MR detected more bone metastases in 14 patients when compared to the conventional bone scan, which caught only one lesion that was not detected by PET/MR.Researchers concluded that PET/MR found a greater extent of metastases and, as an added benefit, significantly reduced the required radiation dose from the injected agents — 80 percent less from 18F-NaF and 67 percent less from 18F-FDG.For more information: www.snmmi.org FacebookTwitterLinkedInPrint分享 Related Content News | CT Angiography (CTA) | August 06, 2019 Artificial Intelligence Improves Heart Attack Risk Assessment When used with a common heart scan, machine learning, a type of artificial intelligence (AI), does better than… read more News | Cardiovascular Ultrasound | August 07, 2019 Contrast Use in First Transthoracic Echocardiogram for Heart Failure Reduces Repeat Testing Heart failure is the fourth most common cause for all admission to U.S. hospitals, and it is the most common reason for… read more News | Colonoscopy Systems | August 06, 2019 Rise in Early Onset Colorectal Cancer Not Aligned With Screening Trends A new study finds that trends in colonoscopy rates did not fully align with the increase in colorectal cancer (CRC) in… read more News | Brachytherapy Systems | August 14, 2019 Efficacy of Isoray’s Cesium Blu Showcased in Recent Studies August 14, 2019 — Isoray announced a trio of studies recently reported at scientific meetings and published in medica read more News | Pediatric Imaging | August 14, 2019 Ultrasound Guidance Improves First-attempt Success in IV Access in Children August 14, 2019 – Children’s veins read more News | Radiation Therapy | August 15, 2019 First Patient Enrolled in World’s Largest Brain Cancer Clinical Trial Henry Ford Cancer Institute is first-in-the-world to enroll a glioblastoma patient in the GBM AGILE Trial (Adaptive… read more News | PET-MRI | June 20, 2017 Dual-Agent PET/MR With Time of Flight Detects More Cancer Hybrid molecular and MR scans performed with combined imaging agents lead to more accurate screening of metastatic breast and prostate cancer News | Mammography | August 14, 2019 Imago Systems Announces Collaboration With Mayo Clinic for Breast Imaging Image visualization company Imago Systems announced it has signed a know-how license with Mayo Clinic. 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