Clarity without compromise.
You and your patients continue to demand lower dose — but not at the expense of diagnostic image quality. The Discovery CT750 HD delivers on both imperatives with a number of clinical benefits:
Low dose made possible by ASiR
Through an algorithmic image reconstruction process known as ASiR* (Advanced Statistical iterative Reconstruction), the Discovery CT750 HD provides exceptional image quality. It may improve low contrast detectability (LCD) up to 40%,1,2 allow for reduced noise,3 and reduce artifacts—all without degrading anatomical integrity. ASiR overcomes the limitations of the conventional CT reconstruction approach known as filtered back projection, arriving at an optimal image using an advanced iterative computation. This computation may dramatically reduce the amount of dose needed to acquire a high-performance image.
The highest resolution in cardiac CT
The Discovery CT750 HD has the highest available Cardiac CT spatial resolution. At 18.2 lp/cm,4 the system provides up to 66% greater spatial resolution than comparable systems. SnapShot Pulse and ASiR enablelow dose not only for Coronary CT but also across cardiovascular exams, enabling cardiac CT of less than 1mSv. Intelligent system design helps to manage high and unstable heart rates in prospective and retrospective modes.
The first quantitative dual-energy CT on the market
Gemstone* Spectral Imaging (GSI) is a unique dual energy technique that uses rapid kV switching and Gemstone Detector technology to acquire and generate material density data. This data enables clinicians to identify the chemical composition of body materials, and aids in the characterization of pathology. At temporal registration speeds of up to 165 times faster than the nearest competitor, GSI is the first quantitative dual energy on the market utilizing a 50cm FOV. Individual spectral images can be derived from 101 user-selectable energy levels. This approach enables GSI to review different levels of monochromatic energy levels for better iodine conspicuity, image contrast optimization, accurate CT numbers and up to a 50% reduction in common beam hardening artifacts — features that together aid in a fast, confident diagnosis.
Greater coverage makes advanced techniques possible
The Discovery CT750 HD has features that enable the performance of advanced diagnostic techniques. VolumeShuttle is a feature that offers acquisition coverage of 80mm. As a result, clinicians can perform CT perfusion in a single scan, with a single contrast injection. Volume Helical Shuttle is a continuous bi-directional scan mode that extends z-coverage and improves temporal sampling. The result is more than 300mm of high-resolution volume coverage, equivalent to a 500-slice image, and the ability to perform 4D-CTA studies.
1. In clinical practice, the use of ASiR may reduce CT patient dose depending on the clinical task, patient size, anatomical location and clinical practice. A consultation with a radiologist and a physicist should be made to determine the appropriate dose to obtain diagnostic image quality for the particular clinical task. ASiR dose reduction was measured on a standard 20cm water phantom. The test involved maintaining constant pixel standard deviation as the mA was reduced at 120 kV.
2. LCD was measured using the Statistical LCD technique, which is based on an analysis of the pixel standard deviation on the uniform section of the CatPhan (R) 600 phantom. The improvement is demonstrated at 120kVp, when comparing ASiR images acquired with 40% lower mAs to full dose FBP images.
3. Noise measured as Pixel Noise Standard Deviation.
4. Based upon internal test data comparing Discovery CT750 HD cardiac half-scan spatial resolution to data from "Advanced CT Scanners for Coronary Angiography", ImPACT Report CEP10043, March, 2010, available at www.impactscan.org.