QLVAPlus & QLVAPlusCL 
Quantitative Left-Ventricular Angiography
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QLVAPlus is a program for the quick, convenient and accurate quantitation of left-ventricular volumes and wall motion from left ventriculograms taken in the 30 degree RAO projection. It uses the Stanford radial method for wall-motion analysis.
 QLVAPlusCL is an officially licensed implementation of the Centerline Method developed by Dr. Florence Sheehan at the University of Washington.

Screen captured from an actual display (1/2 size)

QLVAPlus Features:

  1. QLVAPlus automatically optimizes itself for computer display resolution settings.
  2. Images of any resolution can be analyzed.
There is an Auto mode where brightness and contrast are automatically adjusted order to optimize image appearance.
  1. QLVAPlus is available in English, Dutch, French, German, Italian, Portuguese and Spanish language versions.
  2. The following data can be specified by the operator:
    1. Heart Rate during angiography for the calculation of Cardiac Output.
    2. Height and Weight for the calculation of Body Surface Area.
    3. Artery of Interest and Number of Diseased Vessels for quantitation of hypo- and hyperkinesis within a specific region of the left ventricle (QLVAPlusCL only - not needed by QLVAPlus).
    4. Calibration object size.
  3. Pushbutton controls are used to step through the measurement process. Data can be acquired in any order, at any time. Each of these steps may be repeated as often as necessary:
    1. The View button allows unobstructed viewing of the angiogram.
    2. The Calibrate button allows the user the specify two points on a calibration object such as a grid or sphere.
    3. The Trace E.D. button saves the end-diastolic image and allows the user to trace or edit the end-diastolic contour.
    4. The Trace E.S. button saves the end-systolic image and allows the user to trace or edit the end-systolic contour.
      End-diastolic and end-systolic contours are traced over the live image by clicking the mouse at several points around the border of the left ventricle. A smooth cubic-spline curve is fitted to the points as they are entered. Points can be added, deleted or moved in any order at any time. Images with the contour superimposed can be scrolled backward and forward to determine the best possible fit - this is especially important when tracing the end-systolic image. 
    5. The Print Report button will cause a complete QLVA report to be printed with all of the data shown above, plus end-diastolic and end-systolic images and Patient, Study, Series and Image information.
    6. The E-mail button will cause a complete report, including images, to be sent by e-mail.
  4. All common volumetric parameters are calculated and displayed. Volumes are calculated using the Dodge-Sandler Area-Length method.
  5. A graphical plot displays the end-diastolic and end-systolic contours together with the 100 chords used in the calculation of wall motion using the Centerline Method (QLVAPlusCL only) . 
  6. Regional and global wall motion parameters are calculated and displayed.
  7. A standardized wall motion plot allows convenient inspection of detailed wall-motion information.

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