AmyloidAnalyzer

Quantitative measurement of planar thoracic bone scintigraphy, 1-hour and 3-hour acquisitions

How to use

  1. Load the images. Load the 1-hour acquisition in the left panel and the 3-hour acquisition in the right panel, with “Load DICOM” or by drag and drop. Only uncompressed DICOM files (Explicit or Implicit VR Little Endian) are accepted.
  2. Heart ROI, 1 h. Click on the centre of the heart and drag outward to set the radius.
  3. Contralateral lung ROI, 1 h. Click once on the contralateral lung. Its radius is locked to the heart ROI.
  4. ROIs at 3 h. Press “Copy ROI 1 h → 3 h”, or click on the 3-hour image to place the heart ROI and then the contralateral lung ROI. Radii are locked to the 1-hour ROIs.
  5. Adjust. Drag any ROI to move it and remove it with ✕. The WL and WW sliders change the display only; measurements always use the original pixel values.
  6. Record and export. Select the Perugini visual grade if required, then open “📋 Export values” to copy the values or download a CSV file.

Everything runs locally in this browser and no data is sent to any server. The tool reports numerical values only; it applies no threshold, classification or interpretation.

Derived values

H/CL ratio, 1 h
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H/CL ratio, 3 h
—
Retention IndexH/CL 3 h − H/CL 1 h
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Total image counts, 1 h
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Total image counts, 3 h
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H/CL = mean counts per pixel in the heart ROI divided by mean counts per pixel in the contralateral lung ROI, measured on the same image.

Perugini visual grade

Operator input, recorded as entered
Perugini grade: not assigned

AmyloidAnalyzer reports numerical measurements only. All processing takes place locally in the browser; no data is sent to any server.