CN108175957B - Method and device for monitoring focus position in radiotherapy - Google Patents
Method and device for monitoring focus position in radiotherapy Download PDFInfo
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- CN108175957B CN108175957B CN201810060487.0A CN201810060487A CN108175957B CN 108175957 B CN108175957 B CN 108175957B CN 201810060487 A CN201810060487 A CN 201810060487A CN 108175957 B CN108175957 B CN 108175957B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/103—Treatment planning systems
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1092—Details
Abstract
The embodiment of the invention discloses a method for monitoring the position of a focus in radiotherapy, which can be used for acquiring reference data related to the body shape of a patient in an initial state in advance, wherein the reference data can reflect the accurate position of the focus because the position of the focus can be considered to be accurate in the initial state. Detection data related to the patient's shape may be obtained before or during each radiotherapy, and the detection data may reflect the actual position of the lesion before or during the radiotherapy. Therefore, the detection data and the reference data are compared, the body shape change data of the patient relative to the initial state can be determined, and the body shape change data can reflect the position change condition between the actual position of the focus and the accurate position of the focus, so that whether the position of the focus changes or not can be judged according to the body shape change data.
Description
Technical Field
The invention relates to the technical field of radiotherapy, in particular to a method and a device for monitoring a focus position in radiotherapy.
Background
Radiation therapy is an important approach to tumor treatment, and its goal is to maximize the concentration of the radiation dose in the focal zone, killing tumor cells, while surrounding normal tissues or organs are spared or protected from unnecessary radiation.
Before radiotherapy, a patient is firstly subjected to positioning scanning to determine the position of a focus, a body model is customized according to the body shape of the patient, and positioning marks for radiotherapy are marked on the body model, wherein the positioning marks correspond to the part irradiated by a radiation dose. In the radiotherapy process, the phantom covers the part of the patient needing to be subjected to radiotherapy and fixes the patient, radiotherapy is carried out according to the positioning marks, and the deviation of the radiotherapy position caused by the movement of the patient in the radiotherapy process is avoided.
However, during the irradiation process of radiotherapy, due to pain or other reasons, the body of the patient may drive the phantom to move or move in the phantom, and the body condition of the patient may change after the radiotherapy, so that the original phantom is not suitable for the body type of the patient, and these various reasons may cause the problem of deviation of the irradiation region during the radiotherapy, which affects the health and treatment effect of the patient.
Disclosure of Invention
The invention provides a method and a device for monitoring the position of a focus in radiotherapy, which are used for monitoring the position of the focus in real time before or during the irradiation process of the radiotherapy, thereby ensuring the accuracy of the position of the radiotherapy in the radiotherapy and ensuring the body health and the treatment effect of a patient.
The invention provides a method for monitoring the position of a focus in radiotherapy, which is used for acquiring reference data related to the body shape of a patient in an initial state in advance, and comprises the following steps:
obtaining test data relating to the patient's size;
determining body shape change data relative to the initial state according to the detection data and the reference data;
and judging whether the position of the focus is changed or not according to the body shape change data.
Optionally, the reference data and the detection data are weight data of the patient at different positions on the treatment couch, and the shape change data is weight change data.
Optionally, the determining, according to the detection data and the reference data, the shape change data relative to the initial state includes:
comparing the detection data at the same position point with the reference data to obtain weight change data at each position point;
the judging whether the position of the focus is changed according to the body shape change data comprises the following steps:
obtaining abnormal position points of the weight change data exceeding a first threshold;
judging whether the number of the abnormal position points exceeds a second threshold value;
if yes, determining that the position of the focus is changed.
Optionally, the determining, according to the detection data and the reference data, the shape change data relative to the initial state includes:
comparing the detection data and the reference data at the same position point in a preset area, and determining weight change data at each position point in the preset area;
the judging whether the position of the focus is changed according to the body shape change data comprises the following steps:
obtaining an abnormal position point of the weight change data exceeding a third threshold;
judging whether the number of the abnormal position points exceeds a fourth threshold value;
if yes, determining that the position of the focus is changed.
Optionally, the reference data and the detection data are body temperature data at different locations of the patient;
before the method is carried out, the method further comprises the following steps:
constructing an initial contour model of the patient using the reference data;
the determining of the body shape change data relative to the initial state according to the detection data and the reference data comprises:
constructing a detection contour model of the patient by using the detection data;
obtaining position change data of the detection contour model relative to the initial contour model, wherein the position change data is body shape change data; then the process of the first step is carried out,
the judging whether the position of the focus is changed according to the body shape change data comprises the following steps:
judging whether the position change data exceeds a fifth threshold value;
if yes, determining that the position of the focus is changed.
Optionally, the method further comprises:
and if the change of the focus position is determined, sending a prompt of the change of the focus position.
A device for monitoring the location of a lesion during radiation therapy, comprising:
the reference data acquisition unit is used for acquiring reference data related to the body shape of the patient in an initial state in advance;
the detection data acquisition unit is used for acquiring detection data related to the body type of the patient;
the change data determining unit is used for determining body shape change data relative to the initial state according to the detection data and the reference data;
and the lesion position change judging unit is used for judging whether the lesion position changes according to the body shape change data.
Optionally, the reference data and the detection data are weight data of the patient at different positions on the treatment couch, the shape change data is weight change data, and the change data determination unit includes:
a weight change data acquisition unit for comparing the detection data at the same position point with the reference data to obtain weight change data at each position point;
the lesion position change determination unit includes:
a first abnormal position point obtaining unit, configured to obtain an abnormal position point at which the weight change data exceeds a first threshold;
a first abnormal position point number judging unit for judging whether the number of the abnormal position points exceeds a second threshold value;
a first lesion position change determination unit, configured to determine that a change occurs in a lesion position if the change occurs.
Optionally, the change data determining unit includes:
the weight change data determining unit is used for comparing the detection data at the same position point in a preset area with the reference data to determine weight change data at each position point in the preset area;
the lesion position change determination unit includes:
a second abnormal position point obtaining unit, configured to obtain an abnormal position point at which the weight change data exceeds a third threshold;
a second abnormal position point number judging unit, configured to judge whether the number of the abnormal position points exceeds a fourth threshold;
and the second lesion position change determining unit is used for determining that the lesion position changes if the lesion position changes.
Optionally, the reference data and the detection data are body temperature data at different locations of the patient;
the device, still include:
an initial contour model construction unit for constructing an initial contour model of the patient using the reference data;
the change data determination unit includes:
a detection contour model construction unit for constructing a detection contour model of the patient using the detection data;
a position change data acquisition unit, configured to acquire position change data of the detected contour model relative to the initial contour model, where the position change data is body shape change data; then the process of the first step is carried out,
the lesion position change determination unit includes:
a position change data judgment unit configured to judge whether the position change data exceeds a fifth threshold;
and the third lesion position change determining unit is used for determining that the lesion position changes if the lesion position changes.
The method for monitoring the position of the focus in radiotherapy provided by the embodiment of the invention can be used for obtaining the reference data related to the body type of a patient in the initial state in advance, and the reference data can reflect the accurate position of the focus because the position of the focus can be considered to be accurate in the initial state. Detection data related to the patient's shape may be obtained before or during each radiotherapy, and the detection data may reflect the actual position of the lesion before or during the radiotherapy. Therefore, the detection data and the reference data are compared, the body shape change data of the patient relative to the initial state can be determined, and the body shape change data can reflect the position change condition between the actual position of the focus and the accurate position of the focus, so that whether the position of the focus changes or not can be judged according to the body shape change data. Therefore, the embodiment of the invention can obtain the body shape change data of the patient, and can monitor whether the position of the focus is changed according to the obtained body shape change data, thereby ensuring the accuracy of the radiotherapy position during radiotherapy and ensuring the body health and the treatment effect of the patient.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic view of an application scenario of a method for monitoring a lesion position in radiotherapy according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for monitoring a lesion position in radiotherapy according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating an exemplary distribution of pressure sensors on a couch, according to an embodiment of the present invention;
FIG. 4 is a flowchart of a method for monitoring lesion location based on body temperature data according to an embodiment of the present invention;
fig. 5 is a block diagram of a monitoring device for the location of a lesion during radiotherapy according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As described in the background art, during the radiotherapy, although the phantom may be used to cover the part of the patient to be treated with radiotherapy and fix the patient to locate the position of the lesion, during the irradiation process of radiotherapy, the patient may move due to pain or over-long radiotherapy time, and other reasons, so that the location mark marked on the phantom for radiotherapy may not correspond to the position of the lesion of the patient. In addition, after the patient is subjected to multiple times of radiotherapy, the physical condition of the patient may change, so that the original phantom is not suitable for the body type of the patient, for example, after the patient is subjected to multiple times of radiotherapy, the body weight of the patient is reduced, so that the phantom is not fit to the body of the patient any more, and thus, the positioning mark marked on the phantom for performing radiotherapy may not correspond to the position of the focus of the patient.
In the above situation, there may be a problem that the irradiation region is deviated during the radiotherapy, and if the radiotherapy irradiation is continued according to the positioning mark of the radiotherapy, the irradiation region may not be or not be completely the lesion position, thereby causing unnecessary irradiation to the surrounding normal tissues or organs, and affecting the health and treatment effect of the patient.
Therefore, the embodiment of the invention provides a method and a device for monitoring the position of a focus in radiotherapy, which are used for monitoring the position of the focus in real time before or during the irradiation process of the radiotherapy, thereby ensuring the accuracy of the position of the radiotherapy during the radiotherapy, ensuring the physical health of a patient and the treatment effect
For example, embodiments of the present invention may be applied to the scenario shown in FIG. 1. In the above scenario, the user 103 may monitor the position of the lesion of the patient in real time through the user terminal 102, and in order to monitor the position of the lesion, the user terminal 102 may obtain reference data related to the patient's shape in an initial state in advance through the measurement device 101, where the reference data may reflect an accurate position of the lesion. Before or during radiotherapy, the user terminal 102 may obtain, in real time, detection data related to the patient's body form through the measuring device 101, where the detection data may reflect the actual position of the lesion before or during radiotherapy. Wherein, the measuring device can be positioned on the treatment couch or in the treatment room. The user terminal 102 may determine the body shape change data of the patient relative to the initial state by using the obtained detection data and the reference data, the body shape change data may reflect the position change condition between the actual position of the lesion and the accurate position of the lesion, and the user terminal 102 may determine whether the position of the lesion changes by analyzing the body shape change data, so that the user 103 may determine whether to adjust the position of the lesion according to the determination result of the user terminal 102. Therefore, the change condition of the focus position can be monitored in real time in the radiotherapy process, the accuracy of the radiotherapy position is ensured constantly, and the body health and the treatment effect of a patient are ensured.
It should be noted that the above application scenarios are only presented to facilitate understanding of the present invention, and the embodiments of the present invention are not limited in any way in this respect. Rather, embodiments of the present invention may be applied to any scenario where applicable.
The following describes in detail how the embodiments of the present application can monitor the position of a lesion in radiotherapy.
An embodiment of the present application provides a method for monitoring a lesion position in radiotherapy, referring to fig. 2, where fig. 2 is a flowchart of the method for monitoring a lesion position in radiotherapy provided in an embodiment of the present application, and the method includes:
s201, obtaining detection data related to the body type of the patient.
It should be noted that, before the patient does not have any radiotherapy, the body model is customized according to the body shape of the patient to position and mark the position of the focus, at this time, the body shape of the patient is adapted to the body model, and the position of the focus can be accurately reflected by the positioning mark, so that the body model can be customized as an initial state, and the data related to the body shape of the patient, which is used for customizing the body model, is used as reference data. Therefore, before the patient does not carry out any radiotherapy, the data related to the patient body shape according to the customized body model can be obtained, namely the reference data related to the patient body shape in the initial state is obtained, so that the reference data can be compared with the obtained detection data to determine whether the position of the focus is changed.
It should be noted that the reference data and the detection data may be any data related to the body shape of the patient, for example, the reference data and the detection data may be the weight data of the patient at different positions on the treatment couch, in this case, the reference data and the detection data may be obtained by pressure sensors arranged at different positions on the treatment couch, that is, the measuring device may be a pressure sensor.
It should be noted that, when the reference data and the detection data may be the weight data of the patient at different positions on the treatment couch, the method of the embodiment may be applied before or during the radiotherapy, that is, before or during the radiotherapy, to obtain the detection data related to the body shape of the patient, so as to monitor the position of the lesion. The radiotherapy treatment process can be the whole process from the beginning of radiotherapy irradiation to the end of radiotherapy irradiation.
Wherein the pressure sensors may be evenly distributed over the treatment couch, e.g. the distribution shown in fig. 3. As can be seen, the pressure sensors 301 are evenly distributed on the couch 302, and each sensor 301 can obtain the weight data of the patient. In other embodiments, the pressure sensors 301 may be non-uniformly distributed according to the distribution of the patient's contact with the couch 302, for example, the pressure sensors 301 may be more densely distributed at the patient's contact with the couch 302.
For another example, the reference data and the detection data may be body temperature data of different positions of the patient, and in this case, the reference data and the detection data may be obtained by an infrared sensor disposed in the treatment room, that is, the measuring device may be an infrared sensor, the infrared sensor may obtain body temperature data of different positions of the patient, and a method for monitoring a lesion position according to the body temperature data will be described later.
It should be noted that, when the reference data and the detection data can also be body temperature data of different positions of the patient, the method of this embodiment can be applied before radiotherapy.
S202, determining the body shape change data relative to the initial state according to the detection data and the reference data.
And S203, judging whether the position of the focus is changed or not according to the body shape change data.
In this embodiment, since the lesion position may be considered to be accurate in the initial state, the reference data may correspond to the accurate position of the lesion. And detection data related to the body shape of the patient is obtained in real time before or during each radiotherapy, and the detection data can correspond to the actual position of the focus before or during the radiotherapy. Thus, the detection data and the reference data are compared to determine the body shape change data of the patient before or during the radiotherapy relative to the initial state, and the body shape change data can reflect the position change condition between the actual position of the focus and the accurate position of the focus, so that whether the position of the focus changes can be judged according to the body shape change data.
In the present embodiment, when the reference data and the detection data are weight data of the patient at different positions on the treatment couch, the shape change data is weight change data. For example, if the patient moves due to pain during radiotherapy, and the pressure obtained by the pressure sensor located at the position where the treatment couch contacts the patient may change from the initial state due to the movement of the patient, that is, the weight data obtained by the pressure sensor changes from the initial state, one implementation manner of S202 may be to compare the detected data at the same position point with the reference data to obtain the weight change data at each position point.
After the weight change data at each position point is obtained, whether the weight change data at each position point exceeds a first threshold value or not can be judged, the position points of which the weight change data exceed the first threshold value are taken as abnormal position points, the number of the abnormal position points is counted, when the number of the abnormal position points is very small, the lesion position change can be shown to be very small, the lesion position can be almost considered not to be changed, and when the number of the abnormal position points is enough, for example, exceeds a second threshold value, the lesion position can be considered to be changed. Wherein the first threshold and the second threshold may be set empirically.
It will be appreciated that, in general, the lesion site is located only in a certain region of the patient's body. When the reference data and the detection data are weight data of the patient at different positions on the treatment couch, and the body shape change data is weight change data, if the body of the patient moves or the weight of the patient decreases, a situation may occur: the weight change data at the position points in the region where the lesion position is located may be small, and it may be considered that the lesion position is not changed according to the weight change data at the position points in the region where the lesion position is located, but the weight change data at the position points in the regions where some non-lesion positions are located may be large, and it may be considered that the lesion position is changed according to the weight change data change at the position points in the region where these non-lesion positions are located. In this case, whether the lesion position changes or not is mainly determined by the weight change data at the position point of the region where the lesion position is located, so that whether the lesion position changes or not is more accurately determined to better meet the actual situation of radiotherapy in order to avoid the influence of the weight change data at the position point in the region where the lesion position is not located on determining whether the lesion position changes or not, and the region where the lesion position is located can be used as a preset region, and whether the lesion position changes or not can be determined only according to the weight change data at the position point in the preset region.
As an example, one implementation manner of S202 may be to compare the detection data and the reference data at the same position point in a preset area, and determine weight change data at each position point in the preset area.
After the weight change data at each position point in the preset area is obtained, whether the weight change data at each position point in the preset area exceeds a third threshold value or not can be judged, the position points of which the weight change data exceed the third threshold value are taken as abnormal position points, the number of the abnormal position points is counted, when the number of the abnormal position points is very small, the lesion position change can be represented to be very small, the lesion position can be almost considered to be unchanged, and when the number of the abnormal position points is enough, for example, exceeds a fourth threshold value, the lesion position can be considered to be changed. Wherein the third threshold and the fourth threshold may be set empirically.
In this embodiment, before radiotherapy, the lesion position monitoring method described in this embodiment is used to determine that the lesion position changes, and at this time, the body weight of the patient may be significantly reduced after multiple radiotherapy, so that the phantom is no longer attached to the body of the patient, and the lesion position changes. Thus, a prompt for a change in lesion location may be issued to the user in order for the user to determine whether the lesion location of the patient needs to be repositioned to re-customize the phantom for the patient.
When the lesion position monitoring method described in this embodiment is used to determine that the lesion position changes during the radiotherapy process, at this time, the patient may move during the radiotherapy process, and the movement may change the lesion position, which may affect the treatment effect. Therefore, the prompt of the change of the lesion position can be sent to the user, so that the user can pause the treatment, adjust the position of the patient and perform the treatment after the position of the patient returns to normal.
The method for monitoring the position of the focus in radiotherapy provided by the embodiment of the invention can be used for obtaining the reference data related to the body type of a patient in the initial state in advance, and the reference data can reflect the accurate position of the focus because the position of the focus can be considered to be accurate in the initial state. Before or during each radiotherapy, detection data related to the body type of the patient can be obtained in real time, and the detection data can reflect the actual position of the focus before or during the radiotherapy. Therefore, the detection data and the reference data are compared, the body shape change data of the patient relative to the initial state can be determined, and the body shape change data can reflect the position change condition between the actual position of the focus and the accurate position of the focus, so that whether the position of the focus changes or not can be judged according to the body shape change data. Therefore, the embodiment of the invention can obtain the body shape change data of the patient in real time, and can monitor whether the position of the focus is changed or not in real time according to the body shape change data obtained in real time, thereby ensuring the accuracy of the radiotherapy position during radiotherapy and ensuring the body health and the treatment effect of the patient.
Based on the foregoing provided lesion position monitoring method, in view of the situation that the reference data and the detection data are body temperature data of a patient, this embodiment provides a method for monitoring a lesion position based on body temperature data, with reference to fig. 4, where the method includes:
s401, obtaining detection data related to the body type of the patient.
In this embodiment, body temperature data at different locations of the patient may be obtained by infrared sensors in the treatment room.
It should be noted that the method provided in this embodiment is generally applied before radiotherapy. Before radiotherapy, a patient is positioned on a treatment couch, the patient is in contact with a part of the treatment couch, and in general, reference data or detection data acquired by an infrared sensor in a treatment room may include the body temperature of the patient and the temperature of the treatment couch not in contact with the patient. Since the body temperature of the patient and the temperature of the treatment couch may be different, the body temperature of the patient may be a series of consecutive temperatures, for example, the series of consecutive temperatures may be about 37 degrees, the temperature of the treatment couch may be another series of consecutive temperatures, for example, the another series of consecutive temperatures may be about 20 degrees, so that the boundary of the two consecutive temperatures may be used as a contour model of the human body, thereby enabling the determination of the model of the human body from the temperature distribution obtained by the infrared sensor.
Before the method is carried out, reference data related to the body shape of the patient in the initial state, namely body temperature data at different positions of the patient can be obtained in advance, and an initial contour model of the patient can be constructed by using the body temperature data at different positions of the patient. At this time, the position of the initial contour model may correspond to the exact position of the lesion. S402, constructing a detection contour model of the patient by using the detection data.
Before radiotherapy, detection data related to the body type of the patient can be obtained, namely body temperature data of the patient at different positions before radiotherapy is obtained, so that a detection contour model of the patient is constructed according to the body temperature data of the patient at different positions.
S403, obtaining position change data of the detection contour model relative to the initial contour model, wherein the position change data is body shape change data.
S404, judging whether the position change data exceeds a fifth threshold value;
and S405, if so, determining that the position of the focus is changed.
Since the detection data is obtained before each radiotherapy, the detection data may correspond to an actual position of the lesion before the radiotherapy, and the position of the detection contour model may correspond to an actual position of the lesion. Therefore, according to the size of the position change data of the detection contour model relative to the initial contour model, the position change condition of the actual position of the focus relative to the accurate position of the focus can be determined. When the position change data is large enough, for example, exceeds a fifth threshold, the lesion position may be considered to have changed; when the position change data is very small, e.g., does not exceed the fifth threshold, then the lesion position may be considered unchanged.
Similarly, in this embodiment, after determining that the lesion position has changed by using the lesion position monitoring method provided in this embodiment, a prompt indicating that the lesion position has changed may also be sent to the user, so that the user may determine whether to adopt measures such as re-customizing the phantom or suspending treatment, and details thereof are not repeated herein.
The method for monitoring the position of the focus in radiotherapy, provided by the embodiment of the invention, can be used for obtaining reference data related to the body type of a patient in an initial state in advance, and constructing the initial contour model of the patient according to the reference data. Before each radiotherapy, detection data related to the patient body type can be obtained, a detection contour model of the patient is constructed according to the detection data, and the position of the detection contour model of the patient can reflect the actual position of a focus before the radiotherapy. Therefore, the position of the detection contour model of the patient is compared with the position of the initial contour model, so that the position change data of the patient relative to the initial state can be determined, and the position change data can reflect the position change condition between the actual position of the focus and the accurate position of the focus, thereby judging whether the position of the focus is changed or not according to the position change data. Therefore, the position change data of the patient can be obtained, and whether the position of the focus is changed or not can be monitored according to the obtained position change data, so that the accuracy of the radiotherapy position in the radiotherapy process is guaranteed, and the body health and the treatment effect of the patient are guaranteed.
Based on the foregoing embodiments, a method for monitoring a lesion position in radiotherapy is provided, and this embodiment provides a device for monitoring a lesion position in radiotherapy. Referring to fig. 5, fig. 5 is a block diagram showing a structure of a device for monitoring a lesion position in radiotherapy, which includes a reference data acquiring unit 501, a detection data acquiring unit 502, a change data determining unit 503, and a lesion position change judging unit 504:
the reference data acquiring unit 501 is configured to acquire reference data related to the body shape of the patient in an initial state in advance;
the detection data acquisition unit 502 is used for acquiring detection data related to the body type of the patient;
the change data determining unit 503 is configured to determine, according to the detection data and the reference data, body shape change data in an initial state;
the lesion position change determining unit 504 is configured to determine whether a lesion position changes according to the body shape change data.
Optionally, the reference data and the detection data are weight data of the patient at different positions on the treatment couch, and the body shape change data is weight change data.
Optionally, the change data determining unit includes:
a weight change data acquisition unit for comparing the detection data at the same position point with the reference data to obtain weight change data at each position point;
the lesion position change determination unit includes:
a first abnormal position point obtaining unit, configured to obtain an abnormal position point at which the weight change data exceeds a first threshold;
a first abnormal position point number judging unit for judging whether the number of the abnormal position points exceeds a second threshold value;
a first lesion position change determination unit, configured to determine that a change occurs in a lesion position if the change occurs.
Optionally, the change data determining unit includes:
the weight change data determining unit is used for comparing the detection data at the same position point in a preset area with the reference data to determine weight change data at each position point in the preset area;
the lesion position change determination unit includes:
a second abnormal position point obtaining unit, configured to obtain an abnormal position point at which the weight change data exceeds a third threshold;
a second abnormal position point number judging unit, configured to judge whether the number of the abnormal position points exceeds a fourth threshold;
and the second lesion position change determining unit is used for determining that the lesion position changes if the lesion position changes.
Optionally, the reference data and the detection data are body temperature data of different positions of the patient;
the device, still include:
an initial contour model construction unit for constructing an initial contour model of the patient using the reference data;
the change data determination unit includes:
a detection contour model construction unit for constructing a detection contour model of the patient using the detection data;
a position change data acquisition unit, configured to acquire position change data of the detected contour model relative to the initial contour model, where the position change data is body shape change data; then the process of the first step is carried out,
the lesion position change determination unit includes:
a position change data judgment unit configured to judge whether the position change data exceeds a fifth threshold;
and the third lesion position change determining unit is used for determining that the lesion position changes if the lesion position changes.
Optionally, the method further includes:
and the lesion position change prompting unit is used for sending a lesion position change prompt if the lesion position is determined to change.
The monitoring device for the focus position in radiotherapy provided by the embodiment of the invention can obtain the reference data related to the body shape of the patient in the initial state in advance, and construct the initial contour model of the patient according to the reference data. Before each radiotherapy, detection data related to the patient body type can be obtained, a detection contour model of the patient is constructed according to the detection data, and the position of the detection contour model of the patient can reflect the actual position of a focus before the radiotherapy. Therefore, the position of the detection contour model of the patient is compared with the position of the initial contour model, so that the position change data of the patient relative to the initial state can be determined, and the position change data can reflect the position change condition between the actual position of the focus and the accurate position of the focus, thereby judging whether the position of the focus is changed or not according to the position change data. Therefore, the position change data of the patient can be obtained, and whether the position of the focus is changed or not can be monitored according to the obtained position change data, so that the accuracy of the radiotherapy position in the radiotherapy process is guaranteed, and the body health and the treatment effect of the patient are guaranteed.
Based on the foregoing method and apparatus for monitoring a lesion location in radiotherapy, embodiments of the present application further provide a computer-readable storage medium having instructions stored thereon, which when executed by one or more processors, cause an apparatus to perform the following instructions:
obtaining reference data related to the body shape of a patient in an initial state in advance;
obtaining test data relating to the patient's size;
determining body shape change data relative to the initial state according to the detection data and the reference data;
and judging whether the position of the focus is changed or not according to the body shape change data.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, they are described in a relatively simple manner, and reference may be made to some descriptions of method embodiments for relevant points. The above-described system embodiments are merely illustrative, wherein the modules or units described as separate parts may or may not be physically separate, and the parts displayed as modules or units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (5)
1. A method for monitoring a lesion position in radiotherapy, which is characterized in that reference data related to a patient's body type in an initial state is obtained in advance, the method comprising:
obtaining detection data related to the patient's shape before or during radiotherapy;
determining body shape change data relative to the initial state according to the detection data and the reference data, wherein the reference data and the detection data are the weight data of the patient at different positions on the treatment couch, and the body shape change data are weight change data;
judging whether the position of the focus is changed or not according to the body shape change data;
the determining of the body shape change data relative to the initial state according to the detection data and the reference data comprises:
comparing the detection data at the same position point with the reference data to obtain weight change data at each position point;
the judging whether the position of the focus is changed according to the body shape change data comprises the following steps:
obtaining abnormal position points of the weight change data exceeding a first threshold;
judging whether the number of the abnormal position points exceeds a second threshold value;
if yes, determining that the position of the focus is changed.
2. The method of claim 1, wherein determining from the detection data and the reference data, shape change data relative to an initial state comprises:
comparing the detection data and the reference data at the same position point in a preset area, and determining weight change data at each position point in the preset area;
the judging whether the position of the focus is changed according to the body shape change data comprises the following steps:
obtaining an abnormal position point of the weight change data exceeding a third threshold;
judging whether the number of the abnormal position points exceeds a fourth threshold value;
if yes, determining that the position of the focus is changed.
3. The method according to any one of claims 1 or 2, further comprising:
and if the change of the focus position is determined, sending a prompt of the change of the focus position.
4. A device for monitoring the position of a lesion in radiotherapy, comprising:
the reference data acquisition unit is used for acquiring reference data related to the body shape of the patient in an initial state in advance;
the detection data acquisition unit is used for acquiring detection data related to the body shape of the patient before or in the radiotherapy process;
the change data determining unit is used for determining body shape change data relative to the initial state according to the detection data and the reference data, the reference data and the detection data are the weight data of the patient at different positions on the treatment couch, and the body shape change data are weight change data;
the lesion position change judging unit is used for judging whether the lesion position changes according to the body shape change data;
the change data determination unit includes:
a weight change data acquisition unit for comparing the detection data at the same position point with the reference data to obtain weight change data at each position point;
the lesion position change determination unit includes:
a first abnormal position point obtaining unit, configured to obtain an abnormal position point at which the weight change data exceeds a first threshold;
a first abnormal position point number judging unit for judging whether the number of the abnormal position points exceeds a second threshold value;
a first lesion position change determination unit, configured to determine that a change occurs in a lesion position if the change occurs.
5. The apparatus of claim 4, wherein the change data determining unit comprises:
the weight change data determining unit is used for comparing the detection data at the same position point in a preset area with the reference data to determine weight change data at each position point in the preset area;
the lesion position change determination unit includes:
a second abnormal position point obtaining unit, configured to obtain an abnormal position point at which the weight change data exceeds a third threshold;
a second abnormal position point number judging unit, configured to judge whether the number of the abnormal position points exceeds a fourth threshold;
and the second lesion position change determining unit is used for determining that the lesion position changes if the lesion position changes.
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| CN111905272A (en) * | 2020-09-10 | 2020-11-10 | 广州集佳科技有限公司 | Special interventional therapy instrument for ears, noses and throats |
| CN112617825A (en) * | 2020-12-17 | 2021-04-09 | 中国人民解放军西部战区总医院 | Application of lead electrode in rapid positioning of epileptic focus |
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