I think the "halo" is a bit misleading.

Recent articles have used measurements along with the halo. Another sign is difficulty compressing due to the edema in the wall.

The halo is usually shown with color Doppler pictures. When the color is off the wall looks gray to me. With the color on less signal to create the gray scale and I think more contrasty gray scale so the wall looks darker. 

Do people get really dark walls with gray scale.

BTW we are finding it easier to measure with the much higher frequency probes, 16-22 Mhz.

Thoughts?

Larry Needleman

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