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✓ Certified Professional Seller GE Healthcare Optima CT 680 64-Slice (2015)
GE Healthcare Optima CT 680 64-Slice (2015)
GE Healthcare Optima CT 680 64-Slice (2015)
GE Healthcare Optima CT 680 64-Slice (2015)
GE Healthcare Optima CT 680 64-Slice (2015)
GE HealthCare Medical Diagnostic Equipment
Refurbished

GE Healthcare Optima CT 680 64-Slice (2015)

Product Code: MDIE-MIEQ-2843

Noise modelled in the reconstruction, so protocols can run at lower mA.

Filtered back projection treats noise as something to smooth after the fact. Adaptive Statistical Iterative Reconstruction models how noise arises within the measured data and works against it during reconstruction, which is what allows a study to be acquired at a lower tube current. This scanner was built in 2015 and is listed on Medigear.uk for UK business buyers.

Sections
CT Scanner
Categories
Medical Diagnostic Equipment
Condition
Refurbished
Year
2015
Origin
China
Seller Type
Certified Professional Seller
CE & ISO Certified
Global Shipping
Supplier: Medigear
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Every CT image carries noise from the quantum statistics of how many photons reached the detector. Reduce the tube current and fewer photons arrive, so the noise rises, and the conventional route to a quiet image has been to put enough dose through the patient to bury it.

Adaptive Statistical Iterative Reconstruction works on the other side of that trade. The reconstruction models the statistical behaviour of the acquired data, including where noise originates in the measurement chain, and applies that model iteratively as the image is formed. Because noise is being addressed at its source in the data rather than smoothed out of a finished image, the same diagnostic task can be attempted with fewer photons, which is the mechanism behind lower-mA protocols on this platform.

That matters most where dose is already a governed quantity. Paediatric imaging, surveillance in oncology, repeat imaging in inflammatory disease and screening programmes all involve either radiosensitive patients or cumulative exposure across many studies, and a reconstruction that supports a lower acquisition dose applies to every one of them. Under a UK dose framework, the availability of iterative reconstruction is a matter the radiation protection adviser will want documented rather than assumed.

Dose management surrounding it follows the conventional pattern for the generation: automatic exposure control varying current with patient attenuation, modulation along the scan axis and through the rotation, and dose checking aligned with the NEMA XR-25 standard, with the specific tools present on a given system depending on the software release and licences.

The imaging chain across GE's Optima 64-slice line combines a solid-state scintillator detector with a digital data acquisition system and helical reconstruction, delivering isotropic voxels for reformatting in any plane, with axial reconstruction across the acquired channels supporting z-axis visualisation. Cardiac work depends on rotation time for temporal resolution, and trauma and oncological work on coverage per rotation and table speed. Those figures vary between configurations on this line, so they are established for the individual scanner rather than assumed from the model name.

Diagnostic interpretation remains with the reporting radiologist, and exposure decisions with the operator under the employer's dose framework. The model designation, software release, ASiR licence, tube type and condition, detector configuration and rotation time are provided by the seller at quotation, with CE marking documentation, the declaration of conformity, a decontamination certificate and warranty terms issued by the manufacturer or held by the seller.

Paediatric imaging is where a reconstruction supporting lower acquisition dose carries most weight, since radiosensitivity is highest and cumulative exposure begins early.

Oncology surveillance involves repeated studies over years, so a dose reduction applied to each acquisition accumulates across the pathway.

Inflammatory bowel disease and other conditions requiring repeat cross-sectional imaging benefit in the same way, particularly in younger patients.

Routine head, chest and abdominal computed tomography runs across the acquired channels with isotropic voxels available for reformatting in any plane.

Emergency and trauma imaging depends on coverage per rotation and table speed, both of which are established for the individual scanner.

Cardiac work depends on rotation time for temporal resolution, with the figure for this unit confirmed at quotation.

Services operating under a formal dose framework are supported by automatic exposure control, axial and rotational modulation and dose checking aligned with NEMA XR-25.

Noise Addressed Where It Arises

The reconstruction models the statistical behaviour of the acquired data, so noise is worked against during image formation rather than smoothed from a finished image.

Fewer Photons for the Same Task

Because noise is handled within the data, a diagnostic image can be produced from a lower photon count, which is the mechanism behind reduced-mA protocols.

Applied to Every Acquisition

A reconstruction-level dose benefit applies across the whole examination range rather than to a single protocol.

Most Valuable Where Dose Is Governed

Paediatric imaging, oncology surveillance and repeat cross-sectional work all accumulate exposure, and each acquisition carries the benefit.

Exposure Following Patient Attenuation

Automatic exposure control with modulation along the scan axis and through the rotation adjusts current to the anatomy in the beam.

Dose Checking to a Recognised Standard

Dose checking aligned with NEMA XR-25 supports the notification and alert thresholds a department sets.

Isotropic Voxels for Reformatting

Helical reconstruction produces isotropic data, so reformatted planes carry the resolution of the acquisition.

Documented for the Radiation Protection Adviser

The ASiR licence and dose management tools present are set out in writing, which is what a dose framework requires.

Tube Life Established Before Order

Tube type, heat capacity, accumulated scan seconds and slice count are provided by the seller at quotation.

Unit Specification Confirmed, Not Assumed

Because published figures in this market are often drawn from a sibling model, the specifications for this scanner are obtained in writing.

Installation Arranged Alongside Supply

Medigear.uk can arrange the site survey, delivery, installation, staff familiarisation and service cover.

64-Slice Multidetector CT Scanner

A gantry, patient table and operator console covering routine and advanced computed tomography according to the configuration supplied.

Year of Manufacture: 2015

Bearing on software release, licensed applications, tube generation and support arrangements.

Adaptive Statistical Iterative Reconstruction

Statistical modelling of the acquired data applied iteratively during image formation, supplied as a licensed option.

Lower-mA Protocol Support

Acquisition at reduced tube current where the reconstruction is enabled and the protocol is set accordingly.

Automatic Exposure Control

Tube current varied according to patient attenuation through the acquisition.

Axial and Rotational Current Modulation

Exposure adjusted along the scan length and through the gantry rotation.

Dose Check to NEMA XR-25

Notification and alert thresholds aligned with the recognised standard.

Solid-State Scintillator Detector

High absorption efficiency across the detector array, with the configuration on this unit confirmed at quotation.

Digital Data Acquisition System

Detector signal conversion feeding the reconstruction chain.

Helical and Axial Acquisition

Continuous helical scanning with table incrementation, and axial acquisition across the detector channels.

Isotropic Spatial Resolution

Voxels supporting reformatting in any plane without loss of resolution.

Multi-Planar and 3D Reconstruction

Reformatting and volume rendering at the console according to the applications licensed.

X-Ray Tube and Generator

Tube type, heat storage capacity and generator output confirmed at quotation for this unit.

Rotation Time

Minimum rotation time confirmed at quotation, as configurations vary across this line.

Detector Coverage per Rotation

Z-axis coverage confirmed at quotation for the detector configuration fitted.

Gantry Aperture and Table Capacity

Confirmed at quotation for this unit.

Tube Condition and Usage

Accumulated scan seconds and slice count provided by the seller at quotation.

Software Release and Licensed Applications

Determining the dose tools, reconstruction options and clinical applications available, confirmed at quotation.

DICOM Connectivity

Archive and networking, with the configuration confirmed at quotation.

CE Marking and Declaration of Conformity

Issued by the manufacturer and requested from the seller at quotation.

Decontamination Certificate and Warranty Terms

Provided by the seller at quotation, in line with normal practice for used imaging equipment.

Site Survey and Installation

Room dimensions and access, floor loading, power supply, cooling and radiation shielding assessed before installation, which Medigear.uk can arrange.

This GE Optima CT680 64-slice scanner was built in 2015, and the case for it rests on how the image is reconstructed. Noise in computed tomography comes from the quantum statistics of how many photons reach the detector, and lowering tube current means fewer photons and more noise, so the conventional answer has been to put enough dose through the patient to bury it. Adaptive Statistical Iterative Reconstruction models the statistical behaviour of the acquired data and applies that model iteratively as the image is formed, addressing noise within the measurement rather than smoothing a finished image, which is what supports acquiring the same study at a lower tube current. The benefit lands hardest in paediatric imaging, oncology surveillance and repeat cross-sectional work, where exposure accumulates across a pathway. Around it sit automatic exposure control with axial and rotational modulation, dose checking aligned with NEMA XR-25, a solid-state detector feeding a digital acquisition system, and isotropic voxels for reformatting. Diagnostic interpretation remains with the reporting radiologist. The rating plate designation, software release, ASiR licence, tube type and condition, detector configuration and rotation time are provided by the seller at quotation. Medigear.uk lists the scanner for UK business buyers and can arrange a site survey, delivery, installation, staff familiarisation, service cover and the supply of spares and consumables. Enquire for a written quotation.

FAQ

Frequently Asked Questions

Everything buyers need to know about sourcing medical equipment through MediGear.

It is a 64-slice multidetector CT scanner from GE's Optima line, covering routine head, chest, abdominal, musculoskeletal, angiographic and cardiac work according to the configuration and licensed applications supplied. This scanner was built in 2015.

Adaptive Statistical Iterative Reconstruction, which models the statistical behaviour of the acquired data and applies that model iteratively during image formation.

Noise is addressed within the measured data as the image is formed, so a diagnostic image can be produced from fewer photons, which is what supports acquiring at a lower tube current.

Those where dose is already governed closely: paediatric patients, oncology surveillance, repeat imaging in inflammatory disease and screening programmes.

It was a licensed option on this line, so its presence on this unit is set out by the seller at quotation.

Automatic exposure control with modulation along the scan axis and through the rotation, and dose checking aligned with NEMA XR-25, with the tools present depending on the software release and licences.

Rotation time varies between configurations on this line, so the figure for this scanner is confirmed at quotation.

Detector configuration and coverage per rotation are established for the individual scanner and confirmed at quotation.

Specifications quoted for this designation in the secondary market are frequently drawn from a sibling model, so the plate and the unit's own specifications should be obtained in writing.

Tube type, heat storage capacity, accumulated scan seconds and slice count, all of which bear on the working life remaining and are provided by the seller at quotation.

Room dimensions and access, floor loading, power supply, cooling and radiation shielding. Medigear.uk can arrange the site survey and installation once terms are agreed with the seller.