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VTI measurements are created by tracing the Doppler spectral envelope to calculate the integrated velocity across the selected waveform.",[451,455,456],{},"This guide explains how to create, refine, and save VTI measurements.",[446,458,460],{"id":459},"applies-to","Applies to",[462,463,464],"ul",{},[465,466,467,468,472],"li",{},"All users can create measurements, however users with the ",[469,470,471],"strong",{},"Viewer only"," role cannot save measurements.",[474,475,476],"warning",{},[451,477,478],{},"Measurements can only be saved if the study does not already have an approved final report.",[446,480,482],{"id":481},"steps","Steps",[451,484,485],{},[486,487],"img",{"alt":488,"src":489},"","\u002Fscreenshots\u002Fdoppler_vti.gif",[491,492,494],"h3",{"id":493},"step-1-select-the-vti-tool","Step 1: Select the VTI Tool",[496,497,498],"ol",{},[465,499,500,501,504],{},"Select ",[469,502,503],{},"VTI"," from the Measurement Toolbar.",[506,507,508],"note",{},[451,509,510],{},"Doppler measurement tools are only available when viewing a recognised Doppler image.",[491,512,514],{"id":513},"step-2-define-the-vti-origin","Step 2: Define the VTI Origin",[496,516,517,520],{},[465,518,519],{},"Select the point on the waveform where the measurement should begin.",[465,521,522],{},"Move the green slider to the waveform peak to define the origin point.",[491,524,526],{"id":525},"step-3-trace-the-spectral-envelope","Step 3: Trace the Spectral Envelope",[496,528,529,532,535],{},[465,530,531],{},"Trace the Doppler spectral envelope using point-by-point contour tracing.",[465,533,534],{},"Continue selecting points along the waveform boundary until the contour is complete.",[465,536,537],{},"Double-click to complete the measurement.",[491,539,541],{"id":540},"step-4-review-the-measurement","Step 4: Review the Measurement",[451,543,544],{},"Once the contour is complete, HeartLab displays a preview of the measurement highlighted in green.",[451,546,547],{},"The lower pane also provides options to:",[462,549,550,556,559],{},[465,551,552,555],{},[469,553,554],{},"Resample"," the contour",[465,557,558],{},"Retake the measurement",[465,560,561],{},"Save the measurement",[491,563,565],{"id":564},"step-5-save-the-measurement","Step 5: Save the Measurement",[496,567,568,578,592],{},[465,569,500,570,573,574,577],{},[469,571,572],{},"Select Measurement"," or press ",[469,575,576],{},"Enter",".",[465,579,580,581],{},"In the pop-up window:\n",[462,582,583,586,589],{},[465,584,585],{},"Search, scroll, or create a measurement label",[465,587,588],{},"Select the appropriate measurement type",[465,590,591],{},"Optionally include related measurements",[465,593,594,595,573,598,577],{},"Click ",[469,596,597],{},"Save",[469,599,576],{},[451,601,602],{},"The measurement is saved to the study and the annotation remains visible on the image.",[604,605,606],"tip",{},[451,607,608],{},"Use clearly defined Doppler envelopes and avoid tracing excessive background noise to improve measurement consistency and accuracy.",[446,610,612],{"id":611},"related","Related",[462,614,615,620,624],{},[465,616,617],{},[618,619,174],"a",{"href":175},[465,621,622],{},[618,623,170],{"href":171},[465,625,626],{},[618,627,628],{"href":155},"Measurement Accuracy",{"title":488,"searchDepth":630,"depth":631,"links":632},1,2,[633,634,635,643],{"id":448,"depth":631,"text":449},{"id":459,"depth":631,"text":460},{"id":481,"depth":631,"text":482,"children":636},[637,639,640,641,642],{"id":493,"depth":638,"text":494},3,{"id":513,"depth":638,"text":514},{"id":525,"depth":638,"text":526},{"id":540,"depth":638,"text":541},{"id":564,"depth":638,"text":565},{"id":611,"depth":631,"text":612},"Trace and save Doppler Velocity Time Integral (VTI) measurements from spectral Doppler waveforms.","mdc",null,{},true,{"title":178,"description":644},"1zEVg4p8EcF3Phza8bnuN7GdjlRGPBAI7ho51SeZUv0",[652,654],{"title":174,"path":175,"stem":176,"description":653,"children":-1},"Capture and save single-point velocity measurements on Doppler waveforms.",{"title":182,"path":183,"stem":184,"description":655,"children":-1},"Create EF by capturing end-diastolic and end-systolic volume contours.",1779232506076]