Siemens Biograph mCT Flow PET/CT system ends “stop and go” scanning with FlowMotion Technology

The new Biograph mCT Flow released by Siemens Healthcare is the first PET/CT system that moves the patient through the gantry in one continuous motion while still acquiring PET data. Known as FlowMotion, this technology allows the physician to better define imaging protocols based on the scanned organ and provides better image quality with details of the severity of the lesion. This helps to eliminate overlapped scans.12.12.13

The previous Biograph mCT system used sequential static imaging or “stop and go” acquisition where the table moves to a position and stops to acquire an image and then continues moving to the next position and stops to acquire an image and so on, until the entire scan has been performed. The “stop and go” acquisition leads to multiple overlapping scanning positions which can cause image distortion and gives false values of a detected lesion which provides the physician with incorrect information regarding the severity of the lesion. The stop and go acquisition could also startled the patients which led to motion artifacts. With the continuous flow of the table, the patient has a much better experience during the scan and the image quality is notably improved.

The Radiology Technologist (RT) can easily adjust the speed, image resolution and respiratory motion using the Flowmotion technology; this allows RTs to precisely choose the beginning and end of a scan. This process helps reduce the CT radiation dose up to 32% to the patient. The Biograph mCT Flow system also comes with the TrueV technology which allows an increase of 70% in counts (number of photons collected by crystals in the detector). This helps lower dose rates by reducing the injected radiotracer dose and by doubling the scan speed. The TrueV technology helps decrease scan time by 50%.

The Biograph mCT Flow scanner has a 78cm bore, short tunnel and 500 pound table capacity. Optional upgrades for this system include 128 slice CT and an expanded PET field of view up to 21.6 cm.


Jamie Dildy, BS, R.T.(R)
Jamie Dildy, BS, R.T.(R), Clinical Analyst — At MD Buyline, Ms. Dildy is the clinical analyst for mini and mobile C-arms, contrast injectors, lithotripters, SPECT and SPECT/CT, PET/CT and PET MR, urology systems, gamma detection systems and infant care and infant security. She has over 10 years of experience as an interventional radiology technologist and holds her registry license in Radiology Technology through the American Registry of Radiology Technologists (ARRT). Ms. Dildy graduated from The University of Arkansas for Medical Sciences in with a Bachelor of Science in Radiologic Technology.