The soup is back from a Holiday break with our PET/CT edition! Read on to have your PET/CT acronyms decoded and defined.
4D: Technology on the CT portion of PET/CTs that not only captures the location of a tumor but also movement over time, useful when treating a tumor located near an organ that moves, sometimes referred to as respiratory gating. (UPMC Cancer Center, 2013)
ACS: Advanced Computational System, computer on a Siemens PET or PET/CT that acquires the image from the scanner, see also, ICS, IRS and PRS.
Attenuation Correction: Siemens software that takes into account the photons a patient absorbs during a study.
Auto MA: Automatic Exposure Control system, featured on GE Lightspeed-based scanners.
AWW: Advantage Windows Workstation, found only on GE product lines, used for post-processing images.
BGO: PET detector made from Bismuth Germinate and formed into a solid crystal, the most common detector on the market.
Cardiac Gating: A component added to a PET or PET/CT used when studying the heart, isolates the images that correspond to the desired point of the heart’s function using ECG signals.
CareDose: Software found on Siemens PET/CT and CTs, used to produce the same image with less radiological dose.
CTA: Coronary CT Angiogram, a specific study performed by the CT component of a PET/CT, 16 slice detectors or, preferably, 64 slice detectors are required to cover the heart region rapidly enough. (The Journal of Nuclear Medicine, 2007)
DLS4, DST, and DSTE: All acronyms for GE’s Discovery PET/CT line, see GE Discovery PET/CT Scanners Compared for more information.
DoseWise: Software found on Philips CTs, used to produce the same image with less radiological dose.
EBW: Extended Brilliance Workstation, Philips PET/CT and CT workstations.
F18: Fluorodeoxyglucose - The most common radiopharmaceutical, primarily used for oncology, commonly known as F-18, or FDG. (Radiological Society of North America, 2004)
FOV: Field of View, the space the radiologist is focusing on when capturing and diagnosing an image.
GSO: PET detector made from Cerium-doped gadolinium silicate, GSO has the lowest atomic number of any detector and can detect across the widest energy spectrum.
HD PET: High Definition PET, uniform high-resolution throughout the field of view, featured on Siemens Biograph PET/CTs.
HiRez: Higher resolution of image quality in PET, accomplished by arranging the detectors in a ring to minimize image noise. (Journal of Nuclear Medicine, 2005)
ICS: Image Construction System, featured on Siemens PET/CT systems, main computer on the CT side.
iDose: Software found on Philips PET/CT, used to produce the same image with less radiological dose.
IRS: Image Reconstruction System, featured on Siemens PET/CT, reconstructs the image with the PET and CT images fused.
LOR: Line of Response, a line along which the positron annihilation was located. (International Atomic Energy Agency, 2009)
LSO: PET detector made from Cerium-doped lutetium oxyerthosilicate, chemical structure of the LSO allows for images to be obtained in less time than BGO.
LySO: PET detector made from lutetium-yttrium oxyorthosilicate, the fastest detectors on the market. (Iran J Nucl Med, 2009)
MHU: Million Heat Unit, refers to the “size” of an x-ray tube, i.e. the tube’s ability to dissipate heat.
N13: Nitrogen-13 Ammonia, an alternative to Rubidium82 for cardiac gated PET and PET/CT studies.
PET: Positron Emission Tomography, shows the function of the body at a cellular level through the various glucose uptake rates of different organs and tissues.
PICO-3D: Electronic component introduced by Siemens on the Biograph line that sped up detection and increased the signal to noise ratio for PET.
PRS: PET Reconstruction System on a Siemens PET/CT.
Rb82: Rubidium82, a byproduct of Strontium that is used in cardiac-gated PET and PET/CT studies.
Scatter Correction: Siemens software feature that rejects scatter to produce a clearer image from a PET or PET/CT.
Syngo©A software solution by Siemens, multi-modality reading and image sharing built on a client-server platform. (Siemens, 2010)
Tc99: Technetium99, a radioactive agent used in PET and PET/CT
TOF: Time of Flight, excellent image quality can be achieved faster (10-30 mins) depending on the size of the patient, makes the biggest difference for the heaviest patients. (J Nucl Med, 2007)
TruePoint: An iteration of Siemens PET/CT models (i.e., Biograph TruePoint) which, according to Siemens, “completely integrates the functional sensitively of PET with the rich anatomical detail of diagnostic multi-slice CT.” (Siemens, 2012)
TrueV: PET/CT software designed by Siemens to increase the PET field of view.
z-UHR: Ultra High Resolution, Siemens proprietary name for .24mm isotropic resolution.
If there’s a common PET/CT acronym we didn’t mention, leave us a comment below so we can expand the information above.