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QGS - Quantitative Gated SPECT

An interactive stand-alone application for the automatic segmentation, quantification and analysis of static and gated short axis myocardial perfusion SPECT.

QGS provides the following functionality:

  • Automatic generation of left ventricle (LV) inner and outer surfaces and valve plane from three- or four- dimensional (static or gated) LV short axis perfusion SPECT data.
  • Generation of quantitative data including LV volume/time curve, ED (end diastolic) volume, ES (end systolic) volume, SV (stroke volume), EF (ejection fraction), mid-myocardial surface area, SMS (summed motion score), STS (summed thickening score), SM% (summed motion percent), and ST% (summed thickening percent).
  • Display of stress and rest projection (raw) images in static and cine mode, 2D and 3D display of stress and rest short axis SPECT images in 1 (single), 2 (dual), 3 (triple), or 4 (quadruple) mode. Also display of screen capture images (also known as snapshots).
  • Automatic generation of surfaces and polar maps, which display in parametric fashion the pattern of motion and thickening of the LV using normal limits.
  • Gated short axis datasets with associated LV contours will have its diastolic function automatically computed from the time-volume curve and generating PER Peak Emptying Rate (ml/s), PFR Peak Filling Rate (ml/s), MFR/3 Mean Filling Rate for first third of cardiac cycle following end diastole (ml/s), TTPF Time To Peak Filling (intervals)
  • All categorical polar maps and polar map and functional surface overlays in QGS and QPS is available in the 20 segment format and in the AHA standard 17 segment format. 17 segment format categorical scores will be able to be automatically generated using either 17 or 20 segment using motion and thickening databases.
  • Any gated short axis datasets with associated LV contours will have the eccentricity of its mid-myocardial wall for each interval automatically computed, and expressed as an "eccentricity index". It will be displayed in the QGS Information Box as ECC, and will have values between 0 (sphere) and 1 (line).

(may not be in all versions)

  • Prone/Supine combined imaging has been a hallmark of the Cedars-Sinai approach for a decade, improving observer confidence. Prone-supine quantification allows a single measurement to be reported, representing the combination of prone and supine quantifications. This has been documented to improve the accuracy of SPECT interpretation over supine interpretation alone. The clinicians at Cedars-Sinai use this tool on every patient with questionable findings.
  • Motion Frozen generates an ungated image from gated by “warping” all frames of ECG-gated images to the end-diastolic position. Such "motion-frozen" perfusion and viability images have improved resolution and contrast since the blurring effect of cardiac motion is removed.
  • Phase toggle gives access to information regarding the synchrony of contraction from gated myocardial perfusion SPECT images, and can be of importance in assessing the likelihood of a patient benefiting from the growing procedure of cardiac resynchronization therapy (CRT).
  • Shape Index defines 3D left ventricular (LV) geometry derived from LV contours in end systolic and end diastolic phases. It's the ratio between the maximum dimension of the LV in all short-axis planes and the length of the mid-ventricular long axis and has been shown to improve the identification of left ventricular failure.
  • The PowerPoint feature provides the ability to save results and application configuration for case studies, allowing fast and easy launching directly from a PowerPoint slide, excellent for presentations and demonstrations.
  • Integration of ARG (Automated Report Generator) within QGS for reporting functionality.


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Individual applications (QGS, QPS, QBS)

You can find your version number in the "about..." box. Click the About button in the upper right corner of the application.

If using the combined QGS+QPS or AutoQUANT™, the About button is located at the bottom of any of the color scale controls.

AutoQUANT™ users, please see the conversion chart to see which CSMC Cardiac Suite version corresponds to your AutoQUANT™ version.

CSimport

In CSimport (aka CSI), the "about..." box can be displayed from the Help menu in the usual manner.

QGS+QPS and AutoQUANT™

What is the PlusPack module?

PlusPack groups several useful, advanced quantitative and productivity features in one bundle. These features are:

  • Motion frozen: compensate for cardiac motion to generate sharper perfusion datasets
  • Serial change assessment: directly compare serial studies, bypassing comparisons to statistical databases
  • Prone/Supine SPECT perfusion quantification: help eliminate artifacts by merging information from both acquisition positions
  • Shape index calculation: quantify ventricular remodeling, an early marker of disease
  • Phase analysis: assess mechanical dyssynchrony using powerful quantitative and visual tools
  • Powerpoint export: launch the Cardiac Suite from within Microsoft Powerpoint® for enhanced, more interactive presentations

Click here to open a new page with video tutorials about these features.

Basic Perfusion SPECT Bundle

This bundle includes the following applications and features:

QGS - Quantitative Gated SPECT
This application provides cardiac function quantitation using perfusion datasets: ED and ES volumes, ejection fraction. The image data can be viewed in a variety of modes, from selected slices in a 2D view to a rendered 3D surface of the myocardium with function maps (perfusion, motion, thickening and regional EF).
QPS - Quantitative Perfusion SPECT
In addition to cardiac parameters, such as chamber volume and wall area, this application provides perfusion analysis of ungated datasets by comparing rest and stress datasets to a database of normal values (also called normal limits) using statistical methods.
This bundle also includes the CSI data management application and the Companion module (AHA 17-segment scoring, diastolic function, eccentricity).

Basic Perfusion + Blood Pool SPECT Bundle

This bundle includes the following applications and features:

QGS - Quantitative Gated SPECT
This application provides cardiac function quantitation using perfusion datasets: ED and ES volumes, ejection fraction. The image data can be viewed in a variety of modes, from selected slices in a 2D view to a rendered 3D surface of the myocardium with function maps (perfusion, motion, thickening and regional EF).
QPS - Quantitative Perfusion SPECT
In addition to cardiac parameters, such as chamber volume and wall area, this application provides perfusion analysis of ungated datasets by comparing rest and stress datasets to a database of normal values (also called normal limits) using statistical methods.
QBS - Quantitative Blood Pool SPECT
This application provides automatic quantitation of left- and right-ventricular function (ejection fraction, ED and ES volumes, stroke volumes) using gated blood pool SPECT images. It also displays motion polar maps and parametric surfaces.
This bundle also includes the CSI data management application and the Companion module (AHA 17-segment scoring, diastolic function, eccentricity).

Deluxe Perfusion SPECT Bundle

This bundle includes the following applications and features:

QGS - Quantitative Gated SPECT
This application provides cardiac function quantitation using perfusion datasets: ED and ES volumes, ejection fraction. The image data can be viewed in a variety of modes, from selected slices in a 2D view to a rendered 3D surface of the myocardium with function maps (perfusion, motion, thickening and regional EF).
QPS - Quantitative Perfusion SPECT
In addition to cardiac parameters, such as chamber volume and wall area, this application provides perfusion analysis of ungated datasets by comparing rest and stress datasets to a database of normal values (also called normal limits) using statistical methods.
Compared to the Basic Perfusion SPECT bundle, this package adds the PlusPack module, providing serial change assessment, prone/supine perfusion quantification, shape index calculation, phase analysis, and powerpoint export.
This bundle also includes the CSI data management application and the Companion module (AHA 17-segment scoring, diastolic function, eccentricity).

Deluxe Perfusion + Blood Pool SPECT Bundle

This bundle includes the following applications and features:

QGS - Quantitative Gated SPECT
This application provides cardiac function quantitation using perfusion datasets: ED and ES volumes, ejection fraction. The image data can be viewed in a variety of modes, from selected slices in a 2D view to a rendered 3D surface of the myocardium with function maps (perfusion, motion, thickening and regional EF).
QPS - Quantitative Perfusion SPECT
In addition to cardiac parameters, such as chamber volume and wall area, this application provides perfusion analysis of ungated datasets by comparing rest and stress datasets to a database of normal values (also called normal limits) using statistical methods.
QBS - Quantitative Blood Pool SPECT
This application provides automatic quantitation of left- and right-ventricular function (ejection fraction, ED and ES volumes, stroke volumes) using gated blood pool SPECT images. It also displays motion polar maps and parametric surfaces.
Compared to the Basic Perfusion + Blood Pool SPECT bundle, this package adds the PlusPack module, providing serial change assessment, prone/supine perfusion quantification, shape index calculation, phase analysis, and powerpoint export.
This bundle also includes the CSI data management application and the Companion module (AHA 17-segment scoring, diastolic function, eccentricity).

Deluxe Perfusion PET Bundle

This bundle includes the following applications and features:

QGS-PET - Quantitative Gated PET
This application provides cardiac function quantitation using perfusion datasets: ED and ES volumes, ejection fraction. The image data can be viewed in a variety of modes, from selected slices in a 2D view to a rendered 3D surface of the myocardium with function maps (perfusion, motion, thickening and regional EF).
QPET - Quantitative PET
The new PET Kinetics module provides the calculation of Coronary Flow Reserve (CFR) and Myocardial Blood Flow (MBF).
This application also provides automatic segmentation, quantification and analysis of static and gated myocardial perfusion PET, with support for both short axis and transverse datasets.
This bundle is designed for the processing of PET data only and can be purchased at a substantial discount with a SPECT bundle for a complete PET/SPECT processing solution.
This bundle also includes the CSI data management application, the PlusPack module (serial change assessment, prone/supine perfusion quantification, shape index calculation, phase analysis, powerpoint export), the Fusion/CT module (3D display and automatic registration of coronary trees, fused image display), and the Companion module (AHA 17-segment scoring, diastolic function, eccentricity).

The Automated Report Generator (ARG) Add-On

ARG - Automated Report Generator
The Cedars-Sinai reporting system can substantially improve the workflow in your nuclear cardiology department. Its two components are Automated Report Generator (ARG) and QARG.
This add-on provides a reporting server, integration with QPS and QGS, as well as the standalone data entry tool QARG that can be used in the stress lab or anywhere else to enter patient demographics, ECG info, etc...

Automated Reconstruction (AutoRecon) Add-On

AutoRecon
This application offers several automatic processing modules for single-photon emission computed tomography (SPECT) studies.

This add-on provides a full-fledged reconstruction program with the following features:

  • automated reconstruction limits selection
  • automated motion correction
  • filtered backprojection and iterative reconstruction.
  • automatic reorientation of the transaxial data into short axis images

Breathe new life into your old camera by freeing yourself from antiquated workstations!

Motion Correction (MoCo) Add-On

MoCo - Motion Correction
This application provides automatic and manual correction of SPECT acquisition artifacts.

A cost effective solution to benefit from motion correction while using your workstation's reconstruction software.

What is in the Companion module?

The Companion includes several useful features that were added after the initial release of the quantitative cardiac suite. These features are:

  • AHA model 17-segment scoring
  • Eccentricity calculation: a measure of ventricular sphericity to assess ventricular remodeling
  • Diastolic function: ventricular filling and emptying parameters are extracted from interpolated time-volume curves

What is the Fusion/CT module?

The Fusion/CT module adds features related to coronary CT angiography (CTA) and multi-modality registration. These features are:

  • 3D display of coronary trees extracted by a variety of software packages
  • Automated registration of coronary trees (especially useful for non-hybrid systems)
  • Fused image display to assess or correct image registration (for CTA and attenuation CT data)

The Fusion/CT module is standard with the Deluxe PET bundle, and available as an option for SPECT bundles.

What is the Fusion/CT module?

The Fusion/CT module adds features related to coronary CT angiography (CTA) and multi-modality registration. These features are:

  • 3D display of coronary trees extracted by a variety of software packages
  • Automated registration of coronary trees (especially useful for non-hybrid systems)
  • Fused image display to assess or correct image registration (for CTA and attenuation CT data)

The Fusion/CT module is standard with the Deluxe PET bundle, and available as an option for SPECT bundles.

What is the CSI data browser?

Our software packages are designed to be installed on your computer, not on vendor workstations. To use the quantitative applications studies need to be transferred from your acquisition systems to your computer with the Cedars-Sinai software.

CSI allows you to transfer studies and manages the datasets on your computer. Its main features include:

  • Pull data from DICOM Query/Retrieve and FTP servers as well as legacy systems
  • Push data from DICOM systems to your computer
  • Import data from CDs or other removable media, or from a network share
  • Simple, intuitive data management lets you organize data in folders to manage clinical and research projects
  • One-click anonymized mode hides patient identification so you can use the software in interactive lectures

Click here to open a new page with video tutorials about some of these features.