How to Edit M-Mode Ultrasound Images for a Figure in PowerPoint

Transcript

hello so we've got the situation where we want to create a figure using images from a cardiac ultrasound machine we've got cardiac ultrasound M mode images here taken on a visual Sonic Vivo 770 and you can see we've got an image at the top an image at the bottom the image at the top is looking fairly decent you can see the uh sepal wall and the the... Read More

Key Insights

• 🤶 Two cardiac ultrasound M-mode images can be easily compared by creating a side-by-side figure with similar scales.
• 🥰 The scale differences in the images are due to changes in heart size and remodeling over time.
• ⚖️ Cropping, aligning, and adjusting the transparency and scale of one image can help create a visually comparable figure.
• 🤩 The use of the control key (or command key on Mac) and the shift key can aid in precise cropping and alignment.

Questions & Answers

Q: How do you edit M-mode ultrasound images for a comparison figure in PowerPoint?

Crop both images to the areas of interest, place them together, and make the front image about 50% transparent. Overlay the images, align their depth-scale markings, and stretch one until the scales match. Restore full opacity, arrange the images side by side, and recrop their edges so they are scaled identically.

Q: Why must M-mode ultrasound images use the same scale in a comparison figure?

Matching scales let readers visually compare corresponding structures and movement between the images. If the images have different depth scales, placing them side by side is like comparing graph lines that share an x-axis but use different y-axes.

Q: Why do the two cardiac ultrasound images have different depth scales?

The images come from the same subject at different time periods, and remodeling has made one heart bigger. Its M-mode line therefore spans a longer distance, while the software still displays the data in the same-sized window and changes the visible scale.

Q: What depth-scale differences appear in the example images?

The first scale runs from a 9 mm focal depth to 16.4 mm. The second runs from 8.5 mm to 16.7 mm, so the images cannot initially be compared directly at the same displayed size.

Q: How many cardiac cycles should be included when cropping the images?

The demonstrated crop covers approximately five cardiac cycles. Both images are cropped to a similar area before their scales are matched more precisely.

Q: How does transparency help align two M-mode ultrasound images?

Making the front image about 50% transparent allows both the foreground and background scales to remain visible during the overlay. If the wrong image obscures the other, bring the transparent image to the front before aligning and stretching it.

Q: Which keyboard controls help with cropping, stretching, and alignment?

On a PC, hold Control to crop or stretch without restrictions; on a Mac, use Command for the same purpose. Hold Shift while moving an image to constrain its movement to the horizontal axis.

Q: How do you finish the figure after matching the image scales?

Turn off transparency and place the two images side by side. Hold Shift to align them horizontally, then use the crop tool so each image snaps to the corresponding edges of the other. The finished images will have identical scales.

Summary & Key Takeaways

• The content discusses the process of creating a figure using two cardiac ultrasound M-mode images with different scales.

• The purpose is to visually compare the differences between the two images and highlight any functional changes.

• By cropping and aligning the images, adjusting transparency, and stretching one image to match the other, a scaled and aligned figure can be created.