Ct Dose Reduction
Ct Dose Reduction - Related Videos
08:30
X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
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Cited by 2 •
2011
We are developing a dynamic adaptive exposure technique using our scanning beam digital X-ray system. Rather than exposing an object uniformly, the exposure is adapted depending on the opacity of the object. Here we show an experiment on an anthropomorphic phantom that resulted in a dose saving of 30%.
03:11
Oxidation-Reduction Reactions
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2020
Oxidation–Reduction Reactions Earth’s atmosphere contains about 20% molecular oxygen, O2, a chemically reactive gas that plays an essential role in the metabolism of aerobic organisms and in many environmental processes that shape the world. The term oxidation was originally used to describe chemical reactions involving O2, but its meaning has evolved to refer to a broad and important reaction class known as oxidation–reduction (redox) reactions. Some redox reactions involve the transfer of...
09:19
TSPO-PET/CT Imaging to Detect Infarct Formation in a Mouse Model of Ischemic Stroke
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2025
Source: Chaney, A. M., et.al. PET Imaging of Neuroinflammation Using [11C]DPA-713 in a Mouse Model of Ischemic Stroke. J. Vis. Exp. (2018). This video demonstrates a technique for in vivo imaging of neuroinflammation in a mouse model of ischemic stroke using a TSPO-specific radiotracer. Following injection, the radiotracer binds to TSPO, a protein located on the outer mitochondrial membrane and overexpressed in activated immune cells. A PET/CT scanner detects the radiotracer's distribution and...
10:46
Non-fluoroscopic Catheter Tracking for Fluoroscopy Reduction in Interventional Electrophysiology
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Cited by 4 •
2015
Radiation exposure is an underestimated risk in complex ablation procedures. Here, we describe a protocol to significantly decrease fluoroscopy time and dosage for both the patient and the lab staff by using a novel non-fluoroscopic catheter visualization system.
10:53
Functional Imaging of Brown Fat in Mice with 18F-FDG micro-PET/CT
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Cited by 37 •
2012
A method of functional imaging of mouse brown adipose tissue (BAT) is described in which cold-stimulated uptake of 18F-Fluorodeoxyglucose (FDG) in BAT is non-invasively assessed with a standardized micro-PET/CT protocol. This method is robust and sensitive to detect differences in BAT activities in mouse models.
FAQs
Changing tube voltage, tube current, acquisition range, and pitch alters how much radiation the patient receives during image acquisition. Lowering or limiting these settings can reduce exposure, but the changes must remain compatible with the examination’s diagnostic purpose. Appropriate adjustment therefore depends on balancing fewer detected photons and potentially greater image noise against the need for clinically useful images.
Automatic exposure control adjusts scan output to support dose optimization, while iterative reconstruction helps compensate for increased image noise associated with fewer detected photons. These approaches address different parts of the imaging process: one regulates acquisition conditions, and the other improves reconstruction of the measured data. Used together, they can support lower exposure while preserving sufficient diagnostic image quality.
Reducing exposure does not automatically produce an acceptable examination if image quality falls below the level needed for diagnosis. The relevant goal is not the lowest possible dose, but an exposure level that avoids unnecessary radiation while retaining clinically useful information. This balance is especially important when protocols are adapted for different examinations, patients, or repeated imaging needs.
A dose-optimized protocol should review the tube voltage, tube current, acquisition range, and pitch, along with whether automatic exposure control or iterative reconstruction is appropriate. These elements influence radiation exposure and the amount of noise in the resulting images. Reviewing them together allows imaging teams to adjust the examination systematically rather than relying on a single parameter change.
Dose optimization has particular value during routine examinations, pediatric care, and repeated follow-up studies. These situations differ in clinical purpose, but each benefits from avoiding radiation that does not contribute to diagnosis. Applying suitable scan settings and reconstruction approaches can help maintain useful images while supporting safer, more patient-centered imaging protocols across medical practice.
Standardized protocols can incorporate deliberate choices about scan parameters, automatic exposure control, and iterative reconstruction while preserving the image quality required for clinical interpretation. This approach makes dose optimization part of routine examination planning rather than an isolated technical adjustment. It also supports consistent care across routine, pediatric, and follow-up CT studies while reducing unnecessary patient exposure.