A system for measuring lesion formation in a tissue, comprising: a lesion analysis processor programmed to receive as input at least two A-line scan echograms of the tissue, to determine progress of a lesion forming in the tissue by comparing the at least two A-line scan echograms to each other, and to output feedback about the lesion, characterized in that the at least two A-line scan echograms of the tissue are taken at common cardiac deformation states, and along common scan lines at different timings, the lesion analysis processor is programmed to determine progress of the lesion forming in the tissue from the at least two A-line scan echograms by comparing a brightness of a first echogram of the at least two A-line scan echograms to a brightness of a second echogram of the at least two A-line scan echograms, wherein the lesion analysis processor is programmed for acquiring a first A-line scan electrogram of the tissue from an ultrasound imaging device operating at a first transmit power and a first gain, wherein the first A-line scan electrogram comprises a first line scan of the tissue from a surface of the tissue to a depth within the tissue; acquiring a second A-line scan electrogram of the tissue from the ultrasound imaging device after acquiring the first A-line scan electrogram and after an ablation of the tissue, wherein the second A-line scan electrogram comprises a second scan line of the tissue from the surface of the tissue to the depth within the tissue; identifying a region that appears darker in the second A-line scan electrogram than in the first A-line scan electrogram when the second A-line scan electrogram is acquired with the ultrasound imaging device operating at the first transmit power and the first gain; increasing a brightness of the second A-line scan electrogram until the region that appears darker in the second A-line scan electrogram than in the first A-line scan electrogram appears as bright in the second A-line scan electrogram as it appears in the first A-line scan electrogram; and after increasing the brightness of the second A-line scan electrogram: identifying a region that appears brighter in the second A-line scan electrogram than it appears in the first A-line scan electrogram; and providing feedback about a lesion forming in the tissue based upon the region that appears brighter in the second A-line scan electrogram than it appears in the first A-line scan electrogram. a lesion analysis processor programmed to receive as input at least two A-line scan echograms of the tissue, to determine progress of a lesion forming in the tissue by comparing the at least two A-line scan echograms to each other, and to output feedback about the lesion, characterized in that the at least two A-line scan echograms of the tissue are taken at common cardiac deformation states, and along common scan lines at different timings, the lesion analysis processor is programmed to determine progress of the lesion forming in the tissue from the at least two A-line scan echograms by comparing a brightness of a first echogram of the at least two A-line scan echograms to a brightness of a second echogram of the at least two A-line scan echograms, wherein the lesion analysis processor is programmed for acquiring a first A-line scan electrogram of the tissue from an ultrasound imaging device operating at a first transmit power and a first gain, wherein the first A-line scan electrogram comprises a first line scan of the tissue from a surface of the tissue to a depth within the tissue; acquiring a second A-line scan electrogram of the tissue from the ultrasound imaging device after acquiring the first A-line scan electrogram and after an ablation of the tissue, wherein the second A-line scan electrogram comprises a second scan line of the tissue from the surface of the tissue to the depth within the tissue; identifying a region that appears darker in the second A-line scan electrogram than in the first A-line scan electrogram when the second A-line scan electrogram is acquired with the ultrasound imaging device operating at the first transmit power and the first gain; increasing a brightness of the second A-line scan electrogram until the region that appears darker in the second A-line scan electrogram than in the first A-line scan electrogram appears as bright in the second A-line scan electrogram as it appears in the first A-line scan electrogram; and after increasing the brightness of the second A-line scan electrogram: identifying a region that appears brighter in the second A-line scan electrogram than it appears in the first A-line scan electrogram; and providing feedback about a lesion forming in the tissue based upon the region that appears brighter in the second A-line scan electrogram than it appears in the first A-line scan electrogram. identifying a region that appears brighter in the second A-line scan electrogram than it appears in the first A-line scan electrogram; and providing feedback about a lesion forming in the tissue based upon the region that appears brighter in the second A-line scan electrogram than it appears in the first A-line scan electrogram.