CN110772275A - CT scanning method, device and system based on ultrasound - Google Patents
CT scanning method, device and system based on ultrasound Download PDFInfo
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Abstract
The embodiment of the invention discloses a CT scanning method, a device and a system based on ultrasound, wherein the method comprises the following steps: acquiring blood flow information of a measured object through ultrasonic equipment; determining a scanning plan for scanning the target part according to the blood flow information; and performing CT scanning on the target part of the measured object based on the scanning plan. The embodiment of the invention provides a data base for the CT scanning plan through the blood flow information measured by the ultrasonic equipment, solves the problem of higher radiation dose and contrast agent dose in the existing CT scanning process, and realizes the accurate CT scanning of the target part of the measured object under the condition of using the radiation dose and contrast agent dose of a standard level.
Description
Technical Field
The embodiment of the invention relates to the technical field of medical imaging, in particular to a CT scanning method, a device and a system based on ultrasound.
Background
The CT scanning mode is a mode of carrying out CT scanning after a certain dose of iodine-containing water-soluble contrast medium is injected intravenously, and the density difference between normal tissues and focal tissues of an observation part can be effectively increased by injecting the CT contrast medium intravenously, so that the display degree of the focal tissues is improved. The CT scanning method is widely applied in the field of medical imaging, and it is important to accurately obtain the time when the CT contrast medium reaches the target region after being injected.
Due to individual differences of different tested objects, the time for the contrast agent to reach the target observation part is not fixed, and in order to accurately acquire the time for the contrast agent to reach the target part, the bolus tracking technology and the CT scanning technology are combined in the prior art to acquire the action time of the contrast agent of different individuals, so that the time for CT scanning the target part is acquired. Wherein the bolus tracking technology comprises a bolus contrast agent tracking technology and a small-dose bolus tracking technology.
Bolus contrast tracking techniques image tissue by CT scans that are performed when the contrast content of the target site reaches a threshold, but this approach increases the radiation dose of the CT scan. The small-dose bolus tracking technique also requires imaging of tissue by CT scanning, and obtains the time for the contrast agent to reach the target site by injecting a small dose of CT contrast agent in advance, thereby obtaining the time for CT scanning. In the above prior art, in order to accurately obtain the time for CT scanning the target region, both the radiation dose and the contrast agent dose of the CT scan are higher than the standard level.
Disclosure of Invention
The embodiment of the invention provides an ultrasound-based CT scanning method, device and system, which are used for realizing accurate CT scanning of a target part under the condition of using lower radiation dose and contrast agent dose.
In a first aspect, an embodiment of the present invention provides an ultrasound-based CT scanning method, where the method includes:
acquiring blood flow information of a measured object through ultrasonic equipment;
determining a scanning plan for scanning the target part according to the blood flow information;
and performing CT scanning on the target part of the measured object based on the scanning plan.
In a second aspect, an embodiment of the present invention further provides an ultrasound-based CT scanning apparatus, where the apparatus includes:
the blood flow information acquisition module is used for acquiring blood flow information of the measured object through the ultrasonic equipment;
the scanning plan determining module is used for determining a scanning plan of a CT scanning target part according to the blood flow information;
and the CT scanning module is used for carrying out CT scanning on the target part of the measured object based on the scanning plan.
In a third aspect, an embodiment of the present invention further provides an ultrasound-based CT scanning system, where the system includes:
the ultrasonic equipment is used for acquiring blood flow information of a measured object;
the CT scanning device is used for acquiring a CT scanning image;
CT contrast agent for improving display degree of CT scanning image of target part;
a processor for performing the ultrasound-based CT scanning method as claimed in any one of the preceding claims.
In a fourth aspect, embodiments of the present invention also provide a storage medium containing computer-executable instructions which, when executed by a computer processor, are configured to perform any of the ultrasound-based CT scanning methods referred to above.
The embodiment of the invention provides a data base for the CT scanning plan through the blood flow information measured by the ultrasonic equipment, solves the problem of higher radiation dose and contrast agent dose in the existing CT scanning process, and realizes the accurate CT scanning of the target part of the measured object under the condition of using the radiation dose and contrast agent dose of a standard level.
Drawings
Fig. 1 is a flowchart of an ultrasound-based CT scanning method according to an embodiment of the present invention.
Fig. 2 is a flowchart of an ultrasound-based CT scanning method according to a second embodiment of the present invention.
Fig. 3 is a schematic diagram of an ultrasound-based CT scanning apparatus according to a third embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an ultrasound-based CT scanning system according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of an ultrasound-based CT scanning method according to an embodiment of the present invention, where the present embodiment is applicable to a case where an ultrasound apparatus guides CT scanning, and the method may be executed by an ultrasound-based CT scanning apparatus, and the apparatus may be implemented in a software and/or hardware manner. The method specifically comprises the following steps:
and S110, acquiring blood flow information of the measured object through an ultrasonic device.
Among them, the ultrasonic device refers to a medical instrument developed by using physical characteristics of ultrasonic waves and applied to the medical and health fields for diagnosing and treating diseases. The ultrasonic wave is a sound wave with frequency more than 20kHz, has the characteristics of directivity and strong penetration capacity, and the frequency of the ultrasonic wave commonly applied to medical diagnosis is 1MHz-5 MHz. The detection principle of the medical ultrasonic equipment is that the reflection characteristics of different tissues are different when sound waves are transmitted in a human body, and after ultrasonic waves are transmitted to the human body, whether an examined organ is normal or not is diagnosed according to echo signals received by an ultrasonic probe. Ultrasonic apparatuses can be mainly classified into an a-type ultrasonic apparatus, a B-type ultrasonic apparatus, an M-type ultrasonic apparatus, and a D-type ultrasonic apparatus according to the display type of an ultrasonic echo signal, wherein the D-type ultrasonic apparatus is an ultrasonic apparatus for detecting blood flow in a human body using the doppler principle, and is also called a doppler ultrasonic apparatus. In one embodiment, blood flow information of the measured object is acquired by a D-type ultrasonic device.
In one embodiment, optionally, blood flow information of at least one predetermined portion of the object is measured by the ultrasound device. The preset site may be an injection site, a target site, or any site between the injection site and the target site, and the preset site is not limited herein. The blood flow information includes, but is not limited to, blood flow velocity, blood flow volume, blood flow direction, blood flow echo signal, and the like.
And S120, determining a scanning plan for scanning the target part according to the blood flow information.
Improving the image quality of an enhanced CT scan is critical to the medical diagnostic process, but an enhanced CT scan is generally affected by a variety of factors, so planning a scan before performing a CT scan can help improve the image quality of a CT scan and can also reduce the radiation dose and ultrasound contrast agent dose brought by an enhanced CT scan. In one embodiment, the scan plan optionally includes at least one of a delay time, a monitored site, a contrast dose of the CT contrast agent, and an injection rate of the CT contrast agent.
The delay time is a time from the start of injection of the CT contrast medium to the time when the contrast medium reaches the target site through blood circulation. In one embodiment, when the blood flow information includes a blood flow rate, optionally, a length of a blood vessel from the injection site to the target site is determined, and a delay time for scanning the target site is determined based on the length of the blood vessel and the blood flow rate. The length of the blood vessel can be estimated according to the body conditions of different patients, the blood vessel can be imaged by using imaging equipment, and the length of the blood vessel can be calculated according to the imaging result.
In one embodiment, optionally, the total length of the vessel from the injection site to the target site is determined, and the delay time for scanning the target site is determined based on the total length of the vessel and the blood flow rate. More than one type of blood vessel may be flowed through by blood from the injection site to the target site. The total length of the blood vessel refers to the total length of all types of blood vessels that flow between the injection site and the target site. The blood flow rate may be the blood flow rate at any vascular site between the injection site and the target site, but may be the blood flow rate at the injection site or the target site. For example, the total length of a blood vessel from an injection site to a target site is l, the blood flow velocity at a certain blood vessel position is measured as v, and the delay time t for scanning the target site is calculated according to the formula t ═ l/v. The advantage of this arrangement is that the delay time for scanning the target site can be determined by acquiring the blood flow rate once by the ultrasonic apparatus, simplifying the operation steps of scanning.
In one embodiment, optionally, at least two vessel lengths from the injection site to the target site are determined, based on the at least two vessel lengths and the blood flow corresponding to the vessel lengthsAnd determining the delay time of scanning the target part. The length of any one of the at least two blood vessels may include at least one blood vessel type, that is, for a certain blood vessel length, the length of the blood vessel may be the length of a certain type of blood vessel, and of course, the length of the blood vessel may also be the total length of the blood vessel composed of a plurality of types of blood vessels. The blood flow rate corresponding to the length of the blood vessel refers to the flow rate of blood flowing through any position within the corresponding length of the blood vessel. For example, if the injection site is the left arm vein and the target site is the brain, the blood flow velocity v of the left arm vein and the blood flow velocity v of the carotid artery are obtained by the ultrasound device from the injection site to the target site through the left arm vein and the carotid artery
1And the blood flow velocity v of the carotid artery
2And determining the vessel length l of the left arm vein
1And the vessel length l of the carotid artery
2According to the formula t
1＝l
1/v
1Calculating the time t of the vein flowing through the left arm
1According to the formula t
2＝l
2/v
2Calculating the time t of the vein flowing through the left arm
2According to the formula t ═ t
1+t
2And calculating to obtain the delay time t of scanning the target part. This has the advantage that since a plurality of blood vessels may pass from the injection site to the target site, the blood flow rates in different blood vessels may be different, and the accuracy of the delay time can be improved by calculating the blood flow times of different blood vessels separately.
Wherein the monitoring site is from the injection site to a reference site prior to reaching the target site. Because the preparation time of CT scanning exists between the opening of the CT equipment and the scanning of the CT equipment, the monitoring part is added in the scanning plan, and the CT scanning equipment can be opened when the CT contrast agent reaches the monitoring part, thereby avoiding the influence of the preparation time of the CT scanning on the scanning result and improving the quality of the CT scanning. In one embodiment, optionally, the monitored site of the target site of the CT scan is determined based on the delay time, the preparation time of the CT scan, and the blood flow rate. For example, the delay time t from the injection site to the target site is calculated by the technical method described in the above embodiment, and the preparation time of the CT scan is assumed to be t
mThe blood flow rate isv, then according to the formula t
c＝t-t
mThe time t from the injection site to the monitoring site is calculated
cAccording to the formula l-v × t
cAnd calculating to obtain the blood vessel distance l between the monitoring part and the target part, thereby determining the position of the monitoring part.
And S130, performing CT scanning on the target part of the measured object based on the scanning plan.
In one embodiment, the scan plan optionally includes at least one of a delay time, a monitored site, a contrast dose of the CT contrast agent, and an injection rate of the CT contrast agent. In one embodiment, the contrast agent amount of the CT contrast agent and the injection speed of the CT contrast agent may be calculated according to the physical conditions of different patients.
Wherein, when the scan plan includes a delay time, after the injection of the CT contrast agent, in one embodiment, optionally, after the delay time, the CT scan is performed on the target part of the object to be measured.
Wherein, after injection of the CT contrast agent, optionally in one embodiment, a time t elapses for the CT contrast agent to reach the monitored site when the scan plan includes the monitored site
cAnd then, opening a CT scanning device to carry out CT scanning on the target part of the measured object.
According to the technical scheme of the embodiment, a data basis is provided for the CT scanning plan through the blood flow information measured by the ultrasonic equipment, the problem that the radiation dose and the contrast agent dose are high in the existing CT scanning process is solved, and the accurate CT scanning of the target part of the measured object is realized under the condition that the radiation dose and the contrast agent dose of a standard level are used.
Example two
Fig. 2 is a flowchart of an ultrasound-based CT scanning method according to a second embodiment of the present invention, and the technical solution of the present embodiment is further detailed based on the above-mentioned embodiments. Optionally, before obtaining blood flow information of the measured object through the ultrasound device, the method further includes: an ultrasonic contrast agent or a bubble-containing CT contrast agent is injected into the measured object.
The specific implementation steps of this embodiment include:
s210, injecting an ultrasonic contrast agent or a bubble-containing CT contrast agent into the measured object.
The ultrasound contrast agent is a medical agent used in medical ultrasound contrast imaging at present, and generally consists of coated micron-sized bubbles. On the basis of conventional ultrasonic detection, the blood flow echo signal of a human body can be enhanced by intravenous injection of an ultrasonic contrast agent, and the microvascular perfusion information of the tissue is dynamically observed in real time, so that the signal-to-noise ratio and the resolution of an ultrasonic image are improved. As the main component of the ultrasonic contrast agent is micron-sized bubbles, the effect of enhancing the blood flow echo signal of a human body can be realized by adding the bubbles into the CT contrast agent. The blood flow echo signal refers to an echo signal which is generated by backscattering of blood flow and received by the ultrasonic equipment.
And S220, acquiring blood flow information of the measured object through an ultrasonic device.
In one embodiment, the blood flow information optionally includes, but is not limited to, information such as blood flow velocity, blood flow volume, blood flow direction, and blood flow echo signals.
S230, determining a scanning plan for scanning the target part according to the blood flow information.
In one embodiment, the scan plan optionally includes at least one of a delay time, a monitored site, a time of occurrence of a vascular phase, a contrast dose of the CT contrast agent, and an injection rate of the CT contrast agent.
In one embodiment, optionally, the delay time for scanning the target site is determined based on a change in a blood flow echo signal of the target site. Since the ultrasound contrast agent or the bubble-containing CT contrast agent can enhance the intensity of the blood flow echo signal, when the ultrasound device detects that the blood flow echo signal of the target region changes, it indicates that the ultrasound contrast agent or the bubble-containing CT contrast agent is flowing through the target region. The time from the injection of the contrast agent to the detection of the change in the blood flow echo signal at the target site is used as the delay time for scanning the target site.
The vascular phase comprises an arterial phase, a venous phase and a balance phase. The arterial phase or the venous phase refers to a period in which the contrast medium flows through an artery or a vein of the target site, and the equilibrium phase refers to a period in which the distribution of the contrast medium inside and outside the blood vessel is in an equilibrium state. The appearance time of the vascular phase refers to the time from injection of the contrast agent to the arterial, venous, or equilibrium phase of the contrast agent to the target site. In one embodiment, optionally, a blood vessel phase of the target region is determined according to the blood flow information, and the contrast agent amount and the injection speed of the CT scanning target region are determined according to the blood vessel phase.
Wherein, in one embodiment, optionally, the vascular phase of the target site is determined based on the blood flow echo signal. When the target site is in different vascular phases after injection of the contrast agent, the blood flow echo signals detected by the ultrasound device exhibit different echo signal characteristics. The different types of target sites may exhibit different flow echo signals at different vascular phases. In one embodiment, optionally, a vascular phase of the target site is determined based on the blood flow echo signals and the type of target site. For example, when the target site is a liver cancer site, the blood flow echo signal exhibits a completely enhanced signal characteristic when the contrast agent reaches the arterial phase, and exhibits a low echo signal characteristic during the venous phase and the equilibrium phase. When the target site is a regenerative nodule in the liver, the blood flow echo signal exhibits a uniformly enhanced signal characteristic in the portal phase and an equal echo signal characteristic in the equilibrium phase.
Among them, the appearance time of the vascular phase is closely related to the contrast agent amount and the injection speed. In one embodiment, optionally, the detected appearance time of the vascular phase is compared with the standard appearance time of the vascular phase according to the corresponding relationship between the appearance time of the standard vascular phase and the contrast agent dosage and injection speed, and the contrast agent dosage and injection speed are decreased when the detected appearance time of the vascular phase is earlier, and correspondingly, the contrast agent dosage and injection speed are increased when the detected appearance time of the vascular phase is later.
And S240, performing CT scanning on the target part of the measured object based on the scanning plan.
In one embodiment, the scan plan includes at least one of a delay time, a monitored region, an appearance time of a blood vessel phase, a contrast agent amount of a CT contrast agent, and an injection speed of the CT contrast agent when injecting an ultrasound contrast agent to the object to be measured. In one embodiment, the contrast agent amount of the CT contrast agent may be calculated according to the body condition of different patients, or may be determined according to the appearance time of the blood vessel phase. In one embodiment, the injection speed of the CT contrast medium may be calculated according to the body conditions of different patients, or determined according to the appearance time of the vascular phase, or may be kept consistent with the injection speed of the ultrasound contrast medium.
Wherein, when the scan plan includes a delay time or an appearance time of a vascular phase, after the injection of the CT contrast agent, in one embodiment, optionally, when the delay time or the appearance time of the vascular phase is reached, the CT scan is performed on the target part of the measured object. Further, in an embodiment, optionally, the delay time or the appearance time of the vascular phase is subtracted from the preparation time of the CT scan to obtain a corresponding preparation start time, and when the preparation start time is reached, the CT scanning apparatus is turned on to perform the CT scan on the target portion of the object to be measured.
Wherein, after injection of the CT contrast agent when the scan plan includes the monitored site, in one embodiment, optionally, depending on the time t at which the CT contrast agent reaches the monitored site
cAnd opening the CT scanning equipment to carry out CT scanning on the target part of the object to be detected.
In one embodiment, the scan plan includes a monitored part when a bubble-containing CT contrast medium is injected into the object to be measured, and after the bubble-containing CT contrast medium is injected, in one embodiment, the CT scanning device is optionally turned on to perform CT scanning on the target part of the object to be measured when a blood flow echo signal of the monitored part changes.
According to the technical scheme of the embodiment, the problem that the radiation dose and the contrast agent dose are high in the existing CT scanning process is solved by injecting the ultrasonic contrast agent or the bubble-containing CT contrast agent, and the accuracy of the CT scanning plan is further improved under the condition that the radiation dose and the contrast agent dose of a standard level are used, so that accurate CT scanning of the target part of the detected object is realized.
EXAMPLE III
Fig. 3 is a schematic diagram of an ultrasound-based CT scanning apparatus according to a third embodiment of the present invention. The embodiment can be applied to the case of guiding CT scanning by an ultrasonic device, and the device can be realized by adopting a software and/or hardware mode. The ultrasound-based CT scanning apparatus includes a blood flow information acquisition module 310, a scan plan determination module 320, and a CT scanning module 330.
The blood flow information acquiring module 310 is configured to acquire blood flow information of a measured object through an ultrasonic device;
a scan plan determining module 320, configured to determine a scan plan of a CT scan target region according to the blood flow information;
and the CT scanning module 330 is configured to perform CT scanning on a target portion of the object to be measured based on the scanning plan.
According to the technical scheme of the embodiment, a data basis is provided for the CT scanning plan through the blood flow information measured by the ultrasonic equipment, the problem that the radiation dose and the contrast agent dose are high in the existing CT scanning process is solved, and the accurate CT scanning of the target part of the measured object is realized under the condition that the radiation dose and the contrast agent dose of a standard level are used.
On the basis of the above technical solution, optionally, the apparatus further includes:
and the contrast agent injection module is used for injecting an ultrasonic contrast agent or a bubble-containing CT contrast agent into the tested object.
On the basis of the above technical solutions, the scan plan includes at least one of delay time, monitoring site, contrast agent amount, and injection speed.
On the basis of the above technical solutions, the scan plan determining module 320 includes:
a first delay time determining unit for determining at least one blood vessel length from the injection site to the target site, and determining a delay time for scanning the target site based on the at least one blood vessel length and a blood flow rate corresponding to the blood vessel length.
On the basis of the above technical solutions, the scan plan determining module 320 includes:
and a second delay time determination unit for determining a delay time for scanning the target site according to a change in a blood flow echo signal of the target site.
On the basis of the above technical solutions, the scan plan determining module 320 is specifically configured to:
and determining a monitoring part of the CT scanning target part according to the delay time, the preparation time of the CT scanning and the blood flow rate.
On the basis of the above technical solutions, the scan plan determining module 320 is specifically configured to:
determining a blood vessel phase of the target part according to the blood flow information;
and determining the contrast agent amount and the injection speed of the CT scanning target part according to the vascular phase.
The ultrasound-based CT scanning device provided by the embodiment of the invention can be used for executing the ultrasound-based CT scanning method provided by the embodiment of the invention, and has corresponding functions and beneficial effects of the executing method.
It should be noted that, in the embodiment of the ultrasound-based CT scanning apparatus, the included units and modules are only divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
Example four
Fig. 4 is a schematic structural diagram of an ultrasound-based CT scanning system according to a fourth embodiment of the present invention, where the fourth embodiment of the present invention provides a service for implementing the ultrasound-based CT scanning method according to any of the above embodiments of the present invention, and the ultrasound-based CT scanning apparatus according to the above embodiments of the present invention may be configured.
The system includes an ultrasound device 40, a CT scanning device 41, a CT contrast agent 42, and a processor 43. The ultrasonic device 40 is used for acquiring blood flow information of a measured object; a CT scanning device 41 for acquiring a CT scanning image; a CT contrast agent 42 for improving the display of a CT scan image of the target region; a processor 43 for performing the ultrasound-based CT scanning method described above.
In one embodiment, the system optionally further comprises an ultrasound contrast agent for enhancing blood flow echo signals.
The number of processors 43 in the system may be one or more, and one processor 43 is taken as an example in fig. 4; the ultrasound device 40, the CT scanning device 41 and the processor 43 in the system may be connected by a bus or other means, and fig. 4 exemplifies a connection by a bus.
In one embodiment, optionally, the system further comprises a memory. The memory, as a computer-readable storage medium, may be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the ultrasound-based CT scanning method in embodiments of the present invention (e.g., blood flow information acquisition module 310, scan plan determination module 320, and CT scanning module 330). The processor 43 executes software programs, instructions and modules stored in the memory to perform various functional applications and data processing, i.e., to implement the ultrasound-based CT scanning method described above.
The memory can mainly comprise a program storage area and a data storage area, wherein the program storage area can store an operating system and an application program required by at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory may further include memory located remotely from the processor 43, which may be connected to the processor 43 through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
By the CT scanning system based on the ultrasound, the problem that the radiation dose and the contrast agent dose are high in the existing CT scanning process is solved, and the accurate CT scanning of the target part of the detected object is realized under the condition that the radiation dose and the contrast agent dose of a standard level are used.
EXAMPLE five
An embodiment of the present invention further provides a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform a method for ultrasound-based CT scanning, the method including:
acquiring blood flow information of a measured object through ultrasonic equipment;
determining a scanning plan for scanning the target part according to the blood flow information;
based on the scan plan, a CT scan is performed on a target portion of the object to be measured.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, or the like, as well as conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
Of course, the storage medium containing the computer-executable instructions provided by the embodiments of the present invention is not limited to the above method operations, and may also perform related operations in the ultrasound-based CT scanning method provided by any embodiments of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An ultrasound-based CT scanning method, comprising:
acquiring blood flow information of a measured object through ultrasonic equipment;
determining a scanning plan for scanning the target part according to the blood flow information;
and performing CT scanning on the target part of the measured object based on the scanning plan.
2. The method according to claim 1, before acquiring blood flow information of the measured object by the ultrasonic device, further comprising:
an ultrasonic contrast agent or a bubble-containing CT contrast agent is injected into the measured object.
3. The method of claim 1 or 2, wherein the scan plan comprises at least one of a delay time, a monitored site, a contrast dose of CT contrast agent, and an injection rate of CT contrast agent.
4. The method of claim 3, wherein determining a scan plan for scanning the target site based on the blood flow information comprises:
the length of a blood vessel from an injection site to a target site is determined, and a delay time for scanning the target site is determined based on the length of the blood vessel and a blood flow rate.
5. The method of claim 3, wherein determining a scan plan for CT scanning the target site based on the blood flow information comprises:
and determining the delay time for scanning the target part according to the blood flow echo signal of the target part.
6. The method according to claim 4 or 5, wherein the determining a scan plan for CT scanning the target site according to the blood flow information comprises:
and determining the monitoring part of the CT scanning target part according to the delay time, the preparation time of the CT scanning and the blood flow rate.
7. The method of claim 3, wherein determining a scan plan for CT scanning the target site based on the blood flow information comprises:
determining a blood vessel phase of the target part according to the blood flow information;
and determining the contrast agent amount and the injection speed of the CT scanning target part according to the vascular phase.
8. An ultrasound-based CT scanning apparatus, comprising:
the blood flow information acquisition module is used for acquiring blood flow information of the measured object through the ultrasonic equipment;
the scanning plan determining module is used for determining a scanning plan of a CT scanning target part according to the blood flow information;
and the CT scanning module is used for carrying out CT scanning on the target part of the measured object based on the scanning plan.
9. An ultrasound-based CT scanning system, comprising:
the ultrasonic equipment is used for acquiring blood flow information of a measured object;
the CT scanning device is used for acquiring a CT scanning image;
CT contrast agent for improving display degree of CT scanning image of target part;
a processor for performing the ultrasound based CT scanning method of any of claims 1-7.
10. The system of claim 9, further comprising:
an ultrasound contrast agent for enhancing blood flow echo signals.
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