Method and apparatus for improved spatial and temporal resolution in ultrasound imaging
First Claim
1. A method for obtaining diagnostic ultrasound images, the method comprising:
- transmitting a first set of ultrasound pulses at a first frame rate in accordance with a first mode of operation;
receiving echoes from the first set of ultrasound pulses;
transmitting a second set of ultrasound pulses at a second frame rate in accordance with a second mode of operation, said first frame rate differing from said second frame rate;
receiving echoes from the second set of ultrasound pulses; and
displaying a single image representative of echoes received from both of said first and second sets of ultrasound pulses.
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Abstract
A method is provided to simultaneously acquire two ultrasound images. A first set of ultrasound pulses are transmitted at a first frame rate utilizing a first mode of operation. The echoes from the first set of ultrasound pulses are received. A second set of ultrasound pulses are transmitted at a second frame rate utilizing a second mode of operation. The first and second frame rates are different. The first set of ultrasound pulses defines an entire image, while the second set of ultrasound pulses defines a partial image. The echoes from the second set of ultrasound pulses are received, and the echoes from the first and second sets of ultrasound pulses are displayed as a single image.
108 Citations
24 Claims
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1. A method for obtaining diagnostic ultrasound images, the method comprising:
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transmitting a first set of ultrasound pulses at a first frame rate in accordance with a first mode of operation;
receiving echoes from the first set of ultrasound pulses;
transmitting a second set of ultrasound pulses at a second frame rate in accordance with a second mode of operation, said first frame rate differing from said second frame rate;
receiving echoes from the second set of ultrasound pulses; and
displaying a single image representative of echoes received from both of said first and second sets of ultrasound pulses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
transmitting a series of uninterrupted, successive pulses in a common direction relative to an area being scanned;
detecting a series of echoes from the series of uninterrupted, successive pulses; and
calculating a portion of a Doppler image from the series of echoes, said portion of the Doppler image corresponding to the common direction.
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9. The method of claim 1, wherein the first set of ultrasound pulses is interleaved with the second set of ultrasound pulses.
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10. The method of claim 1, wherein transmitting the first set of ultrasound pulses further comprises:
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transmitting at least one ultrasound pulse in a first direction corresponding to a first portion of the single image;
transmitting an ultrasound pulse in a second direction corresponding to a second portion of the single image;
transmitting a second ultrasound pulse in said first direction; and
transmitting a second ultrasound pulse in said second direction.
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11. A method for obtaining ultrasound images of an area of interest, the method comprising:
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transmitting a set of Doppler pulses in accordance with a Doppler mode of operation;
receiving Doppler echoes from the set of Doppler pulses;
after receiving the Doppler echoes, transmitting a set of non-Doppler pulses in accordance with another mode of operation differing from the Doppler mode of operation, wherein said set of non-Doppler pulses corresponds to a sub-region of a displayed image;
receiving non-Doppler echoes from the set of non-Doppler pulses; and
displaying images based on the Doppler and non-Doppler echoes from the Doppler and non-Doppler pulses. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
transmitting at least one Doppler pulse corresponding to a first sub-region of an image; and
immediately receiving echoes from the Doppler pulse, transmitting at least one Doppler pulse corresponding to a second sub-region of the image.
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15. The method of claim 11, wherein said transmitting step further comprises:
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transmitting a first packet of successive Doppler pulses directed in a first direction relative to an area of interest; and
after receiving the echoes from a subset of said set of non-Doppler pulses, transmitting a second packet of successive Doppler pulses in a second direction relative to an area of interest.
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16. The method of claim 11, wherein the second transmitting step includes transmitting at least one non-Doppler pulse corresponding to a sub-region of an image, and wherein the echoes from the non-Doppler pulses form a partial image.
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17. The method of claim 11, wherein the set of Doppler pulses defines N frames of Doppler images and the set of non-Doppler pulses defines M frames of non-Doppler images, and wherein M is less than N.
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18. The method of claim 11, wherein the transmit and receive steps form a scan sequence divided into scan intervals, each Doppler and non-Doppler pulse being transmitted and received in a unique, non-overlapping scan interval, further comprising:
suspending the transmitting and receiving steps during at least one scan interval in a sequence of scan intervals, in which non-Doppler pulses are being transmitted and received.
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19. The method of claim 11, wherein the transmit and receive steps form a scan sequence divided into scan intervals, wherein a subset of non-Doppler pulses is transmitted and received during each scan interval, further comprising:
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transmitting in a first scan interval at least one non-Doppler pulse associated with a first sub-region of a non-Doppler image; and
transmitting in a second scan interval at least one non-Doppler pulse associated with a second sub-region of a non-Doppler image.
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20. The method of claim 11, wherein said transmitting and receiving steps form a scan sequence divided into scan intervals of equal duration.
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21. The method of claim 11, wherein said transmitting a set of non-Doppler pulses includes transmitting at least one non-Doppler pulse corresponding to a sub-region of the image, wherein the received Doppler echoes form a complete image, and wherein the received non-Doppler echoes form a partial image.
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22. The method of claim 11, wherein said image based on the received Doppler echoes is calculated by utilizing a sliding window technique.
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23. The method of claim 11, wherein said image based on the received echoes from the Doppler pulses is comprised of a number of transmit directions, and wherein the first transmitting step further comprises:
transmitting one Doppler pulse in each said transmit direction.
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24. The method of claim 11, wherein the Doppler and non-Doppler pulses are transmitted at a predefined pulse repetition time, further comprising the step of pausing during the transmitting steps by a duration greater than the pulse repetition time.
Specification